Furnaces and kilns and ovens and retorts (F27)

F27            Furnaces; kilns; ovens; retorts(13260)

Device and method for controlling charge in electric arc furnaces // 2627821
FIELD: metallurgy.SUBSTANCE: device is provided with, at least, a registration system of the metal charge pointing profile on the conveyor, with, at least, two means for selective storing and loading the metal charge, spaced apart from each other along the said conveyor. The device also comprises a data processing and controlling system connected to the said registration system of the metal charge pointing profile for detecting empty or insufficiently filled conveyor zones. In addition, the said selective storing and loading means are configured to be selectively activated by the said data processing and controlling system to replenish the metal charge located on the said conveyor with an additional charge in accordance with the said empty or insufficiently filled zones.EFFECT: improving the loading quality.13 cl, 5 dwg

Heat exchange chain with elliptical wire links having increased wear resistance and improved heat transfer // 2627314
FIELD: heating.SUBSTANCE: heat exchange chain comprises of annular links with elliptical cross-section. The major axis of said elliptical cross-section extends in a diametrical direction of an annular link. The chain links are made of alloy steel or carbon steel.EFFECT: improved heat transfer between contacting fluids.4 cl, 3 dwg

anaged injection of solid particles // 2627091
FIELD: metallurgy.SUBSTANCE: to form a mixed stream fed to the fuel and oxidant in the apparatus combustion chamber to form a mixed stream of solid particles and a hot gas is combusted fuel and oxidant into the combustion chamber to form a hot gas stream containing products of combustion, which passes through the nozzle into mentioned conduit, and solids fed through mentioned feed tube to a pipeline and involve particulates in the combustion product stream to form a mixed stream of solids and hot gas which exits through the open end of the pipeline.EFFECT: invention allows injection of a mixed stream of solid particles and hot gas into an electric arc furnace containing a molten metal bath and a slag layer, or to a calciner or chemical reactor.5 cl, 3 dwg

ethod of heating charge stock in a high-temperature furnace // 2626382
FIELD: metallurgy.SUBSTANCE: in the method for heating charge stock in a high-temperature furnace (1), in which, charge stock and center punch (2) made of petroleum coke and having a current lead are layer-by-layer charged in bath furnace, the bottom of which is made with chamfered corners, according to the invention, additional center punches made of petroleum coke and having current leads located at a distance from the first, are used. The distance from the center punches wall to the furnace wall is chosen to be a≥0.5 m. The center punches are located symmetrically with respect to the axis of bath, the total mass of center punches for a different number of center punches is chosen to be constant.EFFECT: increase in efficiency, expressed in increasing the mass yield of melting product, reducing the melting time, reducing the consumption of energy resources, reducing harmful emissions into the environment.7 cl, 8 dwg, 1 tbl
Furnace for ignition of agglomeration charge, sintered on moving grate trolleys // 2626370
FIELD: metallurgy.SUBSTANCE: furnace for ignition of the agglomeration charge, sintered on moving grate trolleys, contains a metal lined frame, air-blown side panels and dashboards, an ignition chamber and a transition chamber with a partition wall between them, devices for ignition and flame control. The roof panels are made in the form of alternating air-insulated panels and panels with burners, between which the transition pipes are mounted, which form platforms for maintenance of the panels. The partition wall is formed on a curved suspension with radius of curvature, equal to half the height of the ignition chamber, and the furnace is provided with a collector into which the cooling air nozzles with nozzles are withdrawn to flow towards the separation wall and which serves as a frame for said wall.EFFECT: it is possible to use air, heated in the charge cooler to 300-450 degrees, and personnel access for maintenance of the furnace.3 cl, 6 dwg
Production method of castings in induction furnace // 2626114
FIELD: metallurgy.SUBSTANCE: in the method provide the preparation, charge and melting of the stock in the melting pot with the bottom drain, the melting of the plug and the metal discharge into the mould, after charging the stock into the melting pot the oxygen-free flux is added, wt %: alumina 10÷12, fluorspar 7÷10, cryolite is the rest in the amount of 10÷15% from the mass of the stock. The plug is made of the material with the melting point at 100-200°C is higher than the metallic part of the stock, in the content of which it is taken into account, and its melting is carried out together with the stock. The melting pot and the mould is placed in the single female inductor, and the stock has the following composition, wt %: metal part 95÷97 and ferrosilicon 3÷5.EFFECT: invention makes possible to improve the quality of the iron based castings by performing the melting in the flux protective medium during induction heating and introduction of the active alloying elements.5 cl, 6 ex, 1 tbl, 5 dwg

ethod of processing oxidised of nickel ores // 2624880
FIELD: metallurgy.SUBSTANCE: method includes preliminary drying of nickel ore, annealing of nickel ore in a tubular rotary kiln, continuous charging of the resulting cinder to the bottom of the Vanyukov's furnace including melting and reducing zones and a siphon, melting the cinder in the melting zone of the furnace, transferring the resulting melt to the reducing zone of the furnace and siphoning, the production of the resulting slag and the release of the ferronickel melt from the furnace to the ladle. In this case, the ferro-nickel melt is heated on the bottom of the furnace by means of electric heaters installed in the bottom under water-cooled partitions located between the melting and reducing zones and between the reducing zone and the siphon.EFFECT: ensuring the production of ferronickel in liquid form during the processing of oxidized nickel ores in the Vanyukov's furnace with a continuous process, ensuring the comprehensive extraction of useful components from nickel ore.5 cl, 2 tbl, 7 dwg

Retentive shaft for scrap retention // 2623550
FIELD: metallurgy.SUBSTANCE: retentive shaft has tumbler pins which can be pushed into the shaft volume along the direction (x) of inlet and pushed out of the shaft volume against the direction (x) of inlet by means of the drive mechanism in the area of the lower end of the shaft construction. Shaft construction has recesses in the area of its lower end, through these recesses the tumbler pins can be pushed into the shaft volume and pushed out of the shaft volume. Scraping elements are positioned at the shaft construction in the area of the recesses, which are adjacent to the shaft construction and enfold the tumbler pins in a plane oriented perpendicular to the direction (x) of the inlet of thecross-sectional plane.EFFECT: increased reliability.12 cl, 5 dwg

Device and method of metal band continuous processing // 2623520
FIELD: metallurgy.SUBSTANCE: device for continuously processing of the metal band (1), in particular the metal band made of aluminium, or the aluminium alloy, or the non-ferrous metal or the non-ferrous metal alloy, contains the temperature maintaining device (2) through which passes the suspended metal band (1) and the adjustment device (7) of the band middle position, by means of which it is possible to control or adjust the metal band (1) middle position in the band moving plane and across the band moving. The temperature maintaining device (2) has at least one heating section (3) from the input side, and the cooling section (4) from the output side. The band position adjustment device (7) according to the invention is located inside the cooling section (4).EFFECT: provision of the band stable movement in the heating device and the exclusion of its damage.15 cl, 3 dwg

Device for unloading mine lime-gas furnace // 2623402
FIELD: mining engineering.SUBSTANCE: device contains a hearth, mounted on rolling elements with the possibility of moving in a horizontal plane relative to the furnace shaft for dispensing lime to the periphery through the gap between it and the lower part of shaft, knives with adjustable angle of attack for dropping lime into the receiving hopper and conical cap located in the center of the lower part of shaft above the hearth. Wherein, the hearth is made with the possibility of plane-parallel movement by means of two identical gear wheels horizontally mounted on the vertical axes, with synchronous rotation by drive gear placed between them on one line of centers, and provided with rigidly fixed vertical fingers displaced relative to the axes of rotation of wheels by the same distance in same direction and arranged with possibility of relative rotation in cylindrical holes formed in the lower support surface of hearth.EFFECT: uniform delivery of material in a continuous mode from the furnace and increase of lime quality due to creation of stable roasting process conditions.2 dwg

ethod of thermal neutralisation of municipal waste in melted slag and furnance for its implementation // 2623394
FIELD: technological processes.SUBSTANCE: in the method of thermal neutralisation of solid municipal waste in a melted slag including loading of a prepared charge to the working chamber, burning it with formation of a melted slag bath, bubbling the melt with natural gas combustion products through submerged lances, discharging smelting products and cleaning gases after thermal decomposition of the charge, the thermal detoxification of waste is carried out directly in the bath of melted slag due to loading of the charge directly to the level of the melted slag bath and the supply to the melt of the air, preheated to 500°C, with an excess air ratio of α≤1.3 through lances located on the side walls of the working chamber, while the temperature of the slag bath is maintained in the interval of 1400-1600°C, the natural gas is combusted in the removable furnace chambers under α≤0.9, where the combustion products of the natural gas for bubbling of the slag bath and maintaining its tempreture are supplied for the melt level through the nozzles, mounted in the furnace chambers, disposed on the side walls of the working chamber in the staggered order against the nozzles, located on the opposite wall. The furnace for implementating the method comprises a caissonized working chamber equipped with remote combustion furnaces and lances for supplying air to the melt, which are disposed on the side walls above the nozzles of the removable combustion furnaces; the nozzles of the removable combustion furnaces are disposed on opposite side walls of the working chamber in a staggered order against each other; the upper parts of the side walls of the working chamber are inclined; and the loading device is disposed above the level of the axes of the combustion chambers outlet nozzles at a distance no more than 40 diameters of the outlet section of the combustion chamber nozzle.EFFECT: simplified preparation technology of materials for processing.14 cl, 1 dwg, 9 tbl

ethod of obtaining antieroasion coating on the internal wall of chamber unit and the anchor structure for obtaining such coating // 2623267
FIELD: machine engineering.SUBSTANCE: method includes: (i) forming a honeycomb metal anchor structure, mentioned anchor structure being formed by a plurality of strands connected in pairs by a connection of the fastening sections of these strips so as to obtain a plurality of cells between two adjacent strips; (Ii) attaching mentioned anchor structure to mentioned metal wall, so that each cell of the anchoring structure is welded to the wall of the chamber at least at the junctions between the contacting fastening sections of two adjacent strips; (Iii) placing the composite material in the cells from the metal wall up to at least the upper longitudinal edge of each strip.EFFECT: invention provides a coating that is resistant to the phenomenon of decomposition, particularly corrosion, especially due to sulfidation, carburization, oxidation or carbon formation.18 cl, 6 dwg
Oven with rotating drum // 2623158
FIELD: machine engineering.SUBSTANCE: oven contains the inclined-lined body, the heating and firing zones, the intermediate zone between them with the insert, embedded into lining, forming the retaining thresholds, made of the turned along the body rotation the volume rings of hollow blocks, forming the curved along the helical line through channels, charge and discharge chambers, connected outside the housing with the recirculating gas duct with integrated smoke exhauster and cyclone, communicating with the charging tube, the blade nozzle in the heating zone from the series of S-shaped cross section longitudinal blades, located in the staggered rows and provided with perforations close to the blades bottom.EFFECT: provision of the heat transfer intensification from the gas to the material in all oven zones due to the gas emissivity factor increase, the heat-exchange channels surfaces and the material falling particle increase, that increases the productivity of the furnace without reducing its thermal efficiency, or reduces the dimensions and material consumption of the oven, while keeping the productivity.3 dwg

ethod for controlling melting process in vacuum arc furnace // 2620537
FIELD: measuring equipment.SUBSTANCE: method comprises the natural resonant frequency measurement of the oscillating circuit excited by the electromagnetic waves and containing a consumable electrode with an arc, according to which the inter-electrode gap is determined and according to the magnitude of which the melting process is controlled. Herewith the excitation of the electromagnetic waves is performed in the resonant circuit, that is an open resonator, in which the consumable electrode end made with a through hole, through which the electromagnetic waves are introduced, and the liquid metal bath in the mould are used as its reflectors.EFFECT: improving the measurement accuracy of the electrode gap.1 dwg

Burn-through point prediction method and system // 2620211
FIELD: metallurgy.SUBSTANCE: method comprises determining the air amount in each air chamber (6) and determining the exhaust gas components in large chimney (7); calculation of the effective air fraction in each air chamber (6) defined in accordance with the exhaust gas components. Also an effective air amount in each air chamber (6) is calculated and the vertical speed of the material layer sintering in the position of each air chamber (6) is determined. The sintering process end point is determined taking into account the trolley speed, air chamber (6) length and the vertical sintering speed. In this method, analysis of the air amount and exhaust gas components during material sintering can accurately predict the air chamber position where the agglomerate layer thickness is equal to the material layer thickness.EFFECT: improved accuracy of determining the end point of the sintering process on the assembly line.8 cl, 9 dwg

Roasting machine grate // 2619652
FIELD: metallurgy.SUBSTANCE: roasting machine grate comprises upper and lower support horns, remote straps, working body formed by an upper working surface, a bottom surface and side surfaces, wherein grooves are made at least on one side surface from the upper working surface to the bottom surface along the direction of motion of heating carrier gas, their smallest width is equal to or less than the particle size of roasted metallurgical raw materials.EFFECT: acceleratedb pellets annealing by increasing heat-carrying gas flow.6 cl, 9 dwg

Electric arc furnace with tracked swing frame // 2618985
FIELD: metallurgy.SUBSTANCE: invention refers to metallurgy and can be used in an electric arc furnace with a tracked swing frame. The furnace includes a lifting frame with blocks of hydraulic cylinders and supports and a control system for hydraulic cylinders and supports and a swing frame in which a ladle for molten metal is placed, and the swing frame is designed to be placed in the upper side of the lifting frame, or to be placed on supports or rising evenly or unevenly by means of hydraulic cylinder blocks depending on the state of the control system by the hydraulic cylinder blocks and supports of the lifting frame. Under the swing frame, two cross pieces are mounted, each of them having one rail on it, the swing frame is provided with wheels, while the swing frame is designed by means of control system of hydraulic cylinder blocks and supports to be mounted by wheels on the rails, and after installation to move thereon in the exit direction (C) from zone above the lifting frame. The furnace is equipped with a working station adjacent to the swing frame on the side of the swing frame opposite to the exit direction (C), during positioning of the swinging frame on the supports, and the platform for maintenance, located between the furnace working station and the swing frame.EFFECT: invention provides for a more economical and efficient design of the swing frame capable in an emergency situation to quickly remove from the zone above the lifting frame.9 cl, 8 dwg

Rocking kiln for calcining expanded clay // 2618305
FIELD: construction.SUBSTANCE: kiln comprises the lined housing with the sector cutout with an opening angle of 150-160° in the high temperature zone, one sector cutout with a collector for supplying cooling air being formed additionally in the cooling zone, the burner devices and the actuator. The housing is installed horizontally and is mounted of alternately connected sections assembled along the housing perimeter from the alternately connected first equilateral trapezoid, two identical scalene elements and the second equilateral trapezoid, lesser by height than the first one, the lower bases of which are equal to each other and are smaller than the upper bases equal to each other, the section butt ends forming a square. The square of each subsequent section is turned relative to the square of the previous one at an angle of 90° or 180°. The square sides of each attached section bottom base are equal to the square sides of the previous section upper base, with forming a zigzag-shaped multistart drum with broken lines around its perimeter, the pitch of which is increased in the direction from loading to unloading.EFFECT: manufacturing and maintenance simplification, expansion of technological capabilities.9 dwg

ethod of applying protective coating onto quartz crucible inner surface // 2618061
FIELD: metallurgy.SUBSTANCE: by applying a protective coating on the inner surface of the quartz crucible, GeO2 is used formed by passing through a closed cold crucible of gaseous GeO, heated to 850-1,000°C, then the crucible is opened and heated under air to 850-1,000°C, then the crucible is held at the same temperature in an air atmosphere to obtain a dense coating.EFFECT: invention allows to obtain a uniform coating of germanium dioxide in the inner surface of quartz crucible with thickness to 100-150 microns using a technologically simple method not requiring significant energy expenditure.1 dwg, 1 ex

Dental furnace // 2618028
FIELD: heating.SUBSTANCE: dental kiln furnace comprises a base and cover of the furnace, with the furnace cover comprises a chamber for burning replacement for teeth placement of elements. The furnace also comprises a temperature sensor operable to record the temperature displacing element teeth and connected to a control device arranged to control the dental kiln. Dental furnace (10) comprises a block (18) of the actuator configured to actuate the cover (16) of the furnace, and means (30) control configured to control unit (18) of the drive, in particular with the possibility of opening the oven cover for based on the temperature recorded by the sensor (20) temperature.EFFECT: improved accuracy and durability of the manufactured items.15 cl, 2 dwg

Rotating melting furnace for nonferrous waste processing // 2617082
FIELD: metallurgy.SUBSTANCE: furnace comprises a cylindrical body, lining having heat insulating layer consisting of three layers of flexible heat insulation fiber glass mullite silica cardboard and a layer of lightweight chamotte, which is stuffed with the lining layer of mullite non-shrink ramming mass with scull crust, two feed openings formed in front and rear end walls of furnace, tap-hole for molten metal discharging and tap-hole for slag discharging, and a burner device, characterized in that the burner device is designed as two gas injection cylindrical burners embodied in caps, covering the feed openings. Each of these burners has twelve mixers, five of which are equipped with nozzles, are placed at the top in the installation place in the lids of the furnace feed openings, providing a flame with a length 2.4 m, and seven mixers without nozzles are made with the possibility of providing, when burning, a gas-air mixture with flame with a length 1.5 m. The furnace has two rotary lined gutters with welded lined cups mounted on the trolley which can be moved on the trolley along the rails to the tap-hole for molten metal discharging and back by means of an electric drive, and a flue is made in each lid closing the feed opening. The furnace is arranged to operate on natural and artificial draft with two-stage gas scrubbing system providing an environmentally friendly process and comprising a mixing chamber, exhauster, two-piece gas scrubbing unit and unit cyclones.EFFECT: low heat loss, increased productivity and longer furnace life.5 cl, 10 dwg

ethod of cooling melting unit housing and melting unit for its implementation // 2617071
FIELD: metallurgy.SUBSTANCE: method of cooling the melting unit housing comprises feeding of liquid metal heat carrier into the melting chamber housing. The liquid metal heat carrier is cooled by gaseous heat carrier in the heat exchanger. The temperature of the liquid metal heat carrier is recorded. The liquid metal heat carrier cools the upper part of the sealed cavity by supplying liquid metal heat carrier into the cavity, covering the free space, slag bath and the top of the lined metal bath. The lower part of the sealed cavity is cooled by gaseous heat carrier supplied through nozzles arranged on a side surface of the heat exchanger outer wall. The heated gas is withdrawn from the heat carrier from the heat exchanger through nozzles. The liquid metal heat carrier temperature is maintained within the prescribed limits. Consumption of gaseous cold heat carrier is changed automatically or manually. The invention also includes a device for cooling the melting unit housing.EFFECT: increased productivity and efficiency.14 cl, 3 dwg
Unit for thermal processing of cold reducing tube mill working roll and method of its thermal processing // 2615917
FIELD: metallurgy.SUBSTANCE: unit for thermal processing of cold reducing tube mill working roll comprises a lined heating chamber (1) longitudinally disassembled along a vertical plane, high-speed burners (2), a sprayer (3), a lifting and lowering mechanism (4), a frame (5), a mechanism (6) of the heating chamber (1) releasable parts lateral motion. The unit is equipped with a pit (7) located under the base of the heating chamber (1) and protective rotary screens (8) to block the pit (7) and isolate it and the sprayer device (3) located in it from the heating chamber (1). The heating chamber (1) is provided with a recuperator (10). The sprayer (3) comprises water-air nozzles (14) arranged in two rows along the roll (13) and protective curtains (15). The heating chamber (1) is provided with frontal sealing inserts (16). A method of thermal processing of cold reducing tube mill working rolls includes automatic disconnecting and connecting of heating chamber detachable parts horizontally transversely with respect to the roll axis, the sprayer positioning in the heating chamber pit, and isolating it from the latter. In this case, after heating the rolls, they are automatically lifted up into the working position of the roll cooling.EFFECT: increase of efficiency and economy by increasing the productivity and quality of rolls thermal processing.4 cl, 3 dwg
Transporting unit with isolation from ambient atmosphere // 2614912
FIELD: transportation.SUBSTANCE: invention relates to transportation, in particular, to lump or bulk hot material transportation conveyor. Conveyor comprises transport sections, in transportation direction having front and rear walls, as well as connecting them side walls and bottom. Transportation sections by means of stationary and covering their open surface gas-proof upper covering, as well as by located on both sides of transport sections stationary and permeable side coverings are isolated from ambient atmosphere with possibility of inner space filling with introduced protective gas. In transport sections bottom area located opposite upper covering sealing elements are arranged, insulating intermediate spaces from ambient atmosphere, and sealing elements from both sides laterally projecting beyond transport sections side walls and accordingly forming sealing gap with stationary side coverings lower edge.EFFECT: disclosed is transporting unit with isolation from ambient atmosphere.13 cl, 5 dwg
Device for leaf direct reduced iron elements separation // 2614498
FIELD: metallurgy.SUBSTANCE: device includes a motor, drive and idler rotors, between which the leaf iron is divided into elements, and control unit. At that the drive rotor is connected to the drive shaft of the motor with capability to rotate with it and has the first protruberances on its outer surface. The idler rotor is located parallel to the drive rotor with capability of free rotation and has the second protruberances around the outer side. The control unit adjusts the clearance between the drive rotor and the idler rotor by moving the idler rotor relatively the drive rotor in accordance with the number of leaf direct reduced iron, supplied between the idler rotor and the drive rotor.EFFECT: ability of changes flexibile compensation in the working load, depending on the performance and prevention of clogging and blockage of direct reduced iron between the rotors at productivity increase.6 cl, 3 dwg

Rotary charging device for shaft furnace // 2614485
FIELD: metallurgy.SUBSTANCE: device contains a stationary housing for mounting on the throat of a shaft furnace and a mounted rotor installed in the stationary housing for rotation about a substantially vertical axis and forming the main annular chamber of the rotary charging device. The charge distributor is suspended so that it can pivot towards the mounted rotor. The device also contains rotation drive facilities for rotating the mounted rotor about its axis, independent tilt drive facilities for rotating the charge distributor about the substantially horizontal pivot axis independently from the rotation drive facilities. The rotation drive facilities contain a tilt motor with a horizontal output shaft, which is rigidly mounted in relation to the stationary housing, a tilt drive shaft in the main annular chamber which is installed on the mounted rotor. The first outward end of the tilt drive shaft is coupled to the tilt motor through a motion transmission facility and the opposite, second inward end of the tilt drive shaft is connected with the charge distributor for selective actuating its rotation. The motion transmission facilities are designed for peripheral actuation of the mounted rotor to provide for driving force transmittion from the tilt drive motor to the tilt drive shaft in any angular position of the mounted rotor. The motion transmission facilities contain a pair of rotationally integrated gear rims of large diameter, installed in the main annular chamber rotatable about the vertical axis. The first of the gear rims is coupled to the tilt drive motor to transmit the driving force, and the second gear rim is operatively connected with the first end of the tilt drive shaft in such a way that the rotation of the gear rims causes the suitable rotation of the tilt drive shaft about its axis.EFFECT: ensured continuous charging.19 cl, 4 dwg

Rotary charging device for shaft furnace // 2614484
FIELD: metallurgy.SUBSTANCE: device comprises a stationary housing, a hinged rotor rotatably mounted relative to the substantially vertical axis, and the charge distributor suspended pivotally to the hinged rotor. The invention also privides for rotation drive facilities for rotating the hinged rotor about its axis, tilt drive facilities for rotating the charge distributor about the substantially horizontal pivot axis independently from the rotation drive facilities. Tilt drive facilities are mounted on the hinged rotor and rotate with it. They include an electric tilt motor mounted within the main chamber and having a substantially horizontal output shaft, a primary tilt gear actuated by the output shaft of the tilt motor and the secondary tilt gear rotationally integral with the suspension arm of the charge distributor. The primary tilt gear comes into engagement with the secondary tilt gear.EFFECT: ease of distribution chute control.18 cl, 12 dwg

Charge igniting method and furnace for its implementation // 2614475
FIELD: metallurgy.SUBSTANCE: sintering method involves charge feeding loaded in fire grate cars into the workspace of ignition furnace and sintering under the action of the combustion products, filtered through the ignited charge layer. Before fire grate cars enter the furnace workspace, the charge is divided in the longitudinal direction and its surface is mechanically sealed, and sintering in the furnace working space is carried out using a movable gasdynamic shutter mounted in place of fire grate cars with charge enter the furnace. The furnace contains a chamber structure with a frame, end, side walls and roof panels with burners. In this case it is provided with a support post made from a transverse bar with separating plates lowered towards the charge and the sealing plate. On the input side, the furnace is configured with a movable gasdynamic shutter consisting of longitudinal bars placed in a lower part on the inlet end wall and the arcuate wall arranged in between them.EFFECT: improved thermal furnace regime and fines reduction in the finished agglomerate.2 cl, 1 dwg

Clinker cooler // 2614295
FIELD: oil and gas industry.SUBSTANCE: clinker cooler comprises a water bath, a rotating drum installed therein, the means for clinker loading and unloading. The drum is designed as the obliquely installed respectively to its horizontal cylinder axis of rotation with flat end walls of elliptical shape, parallel to each other, perpendicularly or obliquely placed at the angle β to the horizontal drum axis of rotation, while maintaining parallel to each other, at that the major axes of the ellipses end walls are turned relative to each other at the angle ϕ and the spring of barrel shape with a circular coils section is fixed along the entire length of the drum, which equipped with device to change the turns pitch by its stretching or compressing.EFFECT: increase of the clinker cooling degree and expansion of the cooler process capabilities.4 dwg

Shaft kiln for loose material calcination // 2613260
FIELD: food industry.SUBSTANCE: invention relates to sugar production technology, namely to equipment for obtaining saturation gas used for purifying the raw juice, and is used for obtaining lime in shaft kilns in the industry of construction materials, chemical and metallurgical industries. The shaft kiln for loose material to obtain saturation gas used for purifying the raw juice contains a cylindrical lined shaft, the outer surface of which is coated with fine fiber basalt material made in the form of twisted bundles arranged as extended in height from the box operating in the air supply mode to the charging device.EFFECT: shaft kiln for the loose material calcination, ensuring the reduction of energy consumption for the heat and mass transfer process of obtaining saturation gas by maintaining the given temperature mode inside the kiln without additional fuel costs for heating lime raw material from the ambient temperature, especially at low and negative values and in case of moistening by precipitation, to the calcination temperature.1 dwg

ethod and device to determine electrode material consumption during electric furnace operation // 2613004
FIELD: metallurgy.SUBSTANCE: invention refers to metallurgy and can be used in determining electrode material consumption during steel manufacturing in an electric arc furnace. In the method, the weight is measured of at least one electrode column located in an electronic arc furnace or introduced into it without removing it from the furnace using at least one weighing device capable of continuous or quasi-continuous measurement of the column weight with a time resolution of 1 to 500 Hz. Furthermore, the present invention refers to the device in which the weight device is capable of continuous or quasi-continuous weight measurement of at least one electrode column located in an electronic arc furnace and is integrated into transport device for conveying and holding the electrode column.EFFECT: invention provides for the possibility to accurately and reliably determine electrode material consumption for any time interval selected arbitrarily short.13 cl, 2 dwg
Installation for material distribution through pneumatic transportation, containing pressure relief device in pressurized tanks, in which material is stored // 2612893
FIELD: transportation.SUBSTANCE: installation comprises dispensing hopper for intermediate storage of granular or powdered material and pressure relief device in the dispenser hopper. The dispensing hopper is made for alternate increasing of the pressure for emptying the hopper and dispensing pressure relief to allow for its completion. Pressure relief device in the dispenser hopper contains a pressure relief pipeline connected to the dispensing hopper, bag filter, connected to the pressure relief pipeline and flow control devices for flow control in the pressure relief pipeline through the bag filter. Bag filter is a filter made for operation under pressure. Flow control devices are static control devices without moving elements disposed on the pressure relief pipeline downstream of the bag filter. Flow control devices comprise a plate with a bore of a given cross-section or de Laval nozzle.EFFECT: provision of passing the maximum volumetric flow rate less or equal to the maximum allowable bag filter flow, thereby the unit weight reduces.6 cl, 2 dwg
ethod of heating metal scrap in shaft heater of arc steel-making furnace and burner for its implementation // 2612472
FIELD: metallurgy.SUBSTANCE: invention refers to ferrous metallurgy and can be used in the operation of electric arc furnaces, which are adjacent to the shaft heater. The method includes loading of scrap metal in the shaft heater adjacent to the electric arc furnace and its heating, periodic discharge of the heated scrap by means of a pusher from the shaft heater through the scrap discharge window into the workspace of the arc furnace. To heat the metal scrap, gas is used in the form of a combustible mixture of fuel gas, oxygen and ballast gases consisting of combustion products cooled after passing through the scrap layer in the shaft heater, which is fed from the burner mounted on a shaft heater into its lower part. The burner for heating the scrap in the shaft heater of the arc steel-making furnace is equipped by an oxygen chamber, located in the upper part of the housing, with supply of oxygen and connected thereto nozzles of the upper mixing chamber connected by the suction nozzles for intake of the formed ballast gases from the top of the shaft heater, and located at the bottom of the housing chamber of gaseous fuel and the lower mixing chamber connected by the nozzles with the chamber of gaseous fuel and the upper mixing chamber by means of injectors located within the housing for creating in the lower mixing chamber of a combustible mixture of the said ballast gas, oxygen and gaseous fuel, with the lower mixing chamber being connected to the lower part of the shaft heater.EFFECT: invention allows to increase the heating temperature of the metal scrap in the shaft of the arc steel-making furnace and affects the decomposition of dioxins and furans contained in the exhaus gases.5 cl, 3 dwg

Rotating kiln for making cement clinker // 2612114
FIELD: metallurgy.SUBSTANCE: kiln comprises a cylindrical chamber installed in the end and intermediate supports rotatable around its longitudinal axis, inclined at an acute angle to the horizontal, charging and discharging units positioned in the opposite charging and discharging ends, carbon dioxide sampling unit connected to the collector of the abovementioned gas or devices for its utilization and located at the discharge end, and a device for raw mix heating, the cylindrical chamber is designed composite along the length and made up of at least six sections, each of which is provided with a separate rotary drive to ensure rotation independent from the other, the sections are placed one after the other coaxially to the longitudinal axis of the installation and to each other and are separated by five intermediate supports, where the outer ends of the end sections are located in the end supports, and their ends facing the neighbouring sections are placed in the respective intermediate supports. The device for raw mix heating contains several heating units mounted, respectively, on the end and intermediate supports and adapted for heating in the mentioned sections in the direction from the charging unit, respectively, up to 200°C, from 200 to 800 °C, from 800 to 1000 °C, from 1000 to 1300 °C, from 1300 to 1450 °C and from 1300 to 1000 °C. The heating units are designed as burners, preferably gas burners arranged to generate a flame and / or plasma torches mounted on the end and intermediate supports, wherein the heating units are oriented at an acute angle to the longitudinal axis of the installation. A mixture of air and nitrogen is used as plasma-supporting gas in plasma torches, where the plasma torches are communicated with the nitrogen source via a conduit equipped with adjustable gates. The inner surface of the sections has pockets open in the direction of rotation. Nitrogen collector is communicated with the external gas source designed to produce nitrogen from ammonia.EFFECT: increased clinker quality and lower energy costs.6 cl, 2 dwg

Hearth electrode for dc arc furnace // 2611635
FIELD: electricity.SUBSTANCE: invention relates to electrothermics, in particular can be used as anode supply to DC arc furnaces. Hearth electrode includes steel head coupled with a copper case of conical shape, expanded to the bottom, arranged on its side surface fastening flange, contact disk and the cooling unit with water supply and is equipped with a thermocouple arranged in copper body near the joint with steel head, thus, the cooling unit is made in the form of pressure chamber filled with water under pressure and drain chamber with removal of water, and a copper case in the lower part is made with copper sole of cylindrical shape, in the lower end part of which by drilling cylindrical cells are formed in which there are inserted connected with pressure chamber nozzles with a gap with walls of cells to withdraw water to the discharge chamber.EFFECT: invention allows improvement of cooling conditions of hearth electrode and increase its resistance.1 cl, 6 dwg

ethod of power control in eaf and ladle furnace group // 2611605
FIELD: metallurgy.SUBSTANCE: method of power control in EAF and ladle furnace group relates to electrical engineering, namely to electrometallurgy, and also to the power control methods in group of EAFs and ladle furnaces. At the start of each ready-to-start electric arc furnace with the holding time not exceeding the duration of the melt period of the electric arc furnace formerly started, within the allowed adjustment range, when excessing the allowed active power value in the start of each ready-to-start ladle furnace with the holding time within the allowed adjustment range corresponding to the lowest value of active power consumption per a fixed day hour.EFFECT: increased capacity of EAF and ladle furnace group, reduced maximum active power consumption per a fixed day hour.6 dwg

etallurgical plant with efficient use of waste heat // 2610999
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used in metallurgical complex for steel production. System has a unit for melting and/or reduction of metals and a gas generating plant which generates exported gas, wherein carbon dioxide and/or water contained in exported gas in a separation device is at least partially removed from exported gas, wherein obtained gas before feeding into said plant is heated in a furnace device by burning furnace gas, furnace gas is fed into furnace device in a volume, which is more than required for heating obtained gas. Heat energy obtained when burning furnace gas is used inside furnace device for production of steam and/or relative to gas flow of combustion gas generated during combustion of furnace gas, and after furnace device for heating and/or drying raw materials, supplied to gas generating plant and/or installation for melting and/or reduction of metals.EFFECT: invention allows effective use of thermal energy produced in a metallurgical complex, as well as combustible gases.18 cl, 3 dwg
ethod of steel production in electric arc furnace // 2610975
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used in production of steel in an electric arc furnace. Method involves loading into the furnace working space a solid metal charge and solid carbon-containing materials, the charge melting by means of electric arcs and carbonization of the metal with the solid carbon-containing materials during the melting, tapping the metal and slag from the furnace. For additional carbonization of the metal during melting the furnace working space is fed with iron oxides and a carbonaceous material in an amount sufficient for obtaining a high-carbon carbonator in the form of a liquid phase of the reduced in the iron arcs with carbon combustion zone in free and dissolved forms. Herewith the flow rate of iron oxides and the carbonaceous material enabling to obtain the high-carbon carbonator for the melting is not less than 3 % from the metal charge weight.EFFECT: invention increases output of liquid metal due to regulation of carbon content during melting, provides higher degree of metal carbonization since the very beginning of melting and reduction of iron loss into slag and smoke.10 cl, 1 tbl

Two-bath reverberatory furnace for aluminium scrap remelting // 2610641
FIELD: metallurgy.SUBSTANCE: furnace includes a housing formed with refractory external side, front and rear end walls, two baths restricted by bottoms, a roof and walls, two tap holes, a gas duct and a welded frame on which all parts are arranged. The walls of the furnace have external heat insulation, which consists of a double layer of asbestos-sheet cardboard. The furnace casing is laid in two rows of lightweight blocks with two layers of asbestos cardboard between the blocks, the bottoms of the two baths are made from KS-90 corundum blocks, laid on a layer of asbestos cardboard, a steel box is welded to the furnace casing and has insulation between itself and each wall, consisting of a double layer of asbestos-sheet cardboard, the roofs have a refractory heat-insulating coating over the first and second furnace baths and a double layer of refractory heat-insulating mats laid on top of them. Two side walls of the furnace are provided with four injection thirteen-mixer medium pressure burners directed to the bath bottoms at an angle, and two injection thirteen-mixer burners placed in the roof and directed to the first furnace hearth at an angle. The front end wall of the furnace has a door equipped with a hydraulic drive for lifting and lowering the furnace damper, there is one slag door in one side wall and two tap holes in the rear end wall made of quick-change taphole bricks. The furnace is equipped with an afterburning chamber lined in refractory bricks and located in the upper part of the rear wall with a six-mixer injection gas burner, installed inside the chamber and provided with an air flow control device. The furnace has an economizer, 2-stage dust and gas cleaning unit to ensure an environmentally friendly process.EFFECT: high furnace efficiency, reduced heat and burn-off losses and possibility of ecologically clean remelting of aluminium scrap.8 cl, 15 dwg, 1 tbl
Cooling grid of cement clinker annealing furnace // 2610575
FIELD: construction.SUBSTANCE: invention relates to cooling grid for cooling and supply of cement clinker. Cooling grid contains, at least, one element of lattice bottom with, at least, one substrate for cement clinker, having, at least, one cooling air channel terminating in substrate, made, at least, on one section adjacent to its neck with inclination in transportation direction for enabling of air cooling blowing in clinker and bent in transportation direction. Disclosed also is cooling grid lattice bottom latticed element.EFFECT: enabling higher degree of cement clinker cooling.25 cl, 7 dwg

Furnace mixer // 2610099
FIELD: metallurgy.SUBSTANCE: furnace mixer comprises at least one bath with side walls and a bottom, at least one heater for heating molten and/or solid metal located in the bath, and an electromagnetic mixer inductor with a magnetic conductor and a winding mounted to apply electromagnetic field to the metal in the bath. The bottom is provided with stiffening ribs in the form of longitudinal and transverse beams, and the electromagnetic mixer inducer comprises at least two open-loop magnetic conductors, each of which has at least one inductor winding coil mounted under the bottom ensuring maximum approximation to the bottom of the magnetic conductors end surfaces.EFFECT: efficient melt mixing in the entire bath volume, increased strength of the furnace mixer hearth, reduced inducer installation costs and increased service life of the furnace mixer.5 cl, 9 dwg

Electric graphitisation furnace // 2610083
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry. Electric graphitisation furnace comprises end walls with built-in graphite current leads, leakproof umbrella connected by outlet channel with a smoke exhauster, core, in which materials to undergo graphitisation are placed, surrounded on all sides by heat-insulating layers of a charge, lateral wall 3 with cooling air channels, collectors located in lower part of walls 3, combining all channels of each wall, under with cooled hearth channels. Covering elements arranged in hearth channels, provide in half of them, alternating through one or more, air flow through channel from left to right and its outlet successively into air manifold of right wall, and in other half – air flow from right to left and its outlet into air manifold of left wall. Covering elements are made in form of covering plates 6 made from metal with softening temperature not lower than 1,000 °C, equipped with retaining shoulders 7 made from metal with height of 20–50 mm and having on inner surface transverse rollers with diameter 3–4 mm, swirling cooling air flow. Distance between edges of covering plates 6 of neighbouring cooling channels is not less than 15 mm.EFFECT: invention can be used for production of graphitized electrodes and structural graphite materials.1 cl, 2 dwg

ethod for gold and silver alloys separating by vacuum distillation and device for its implementation // 2609581
FIELD: metallurgy.SUBSTANCE: invention refers to metallurgy of noble metals to obtain high-purity metals. The method of separating gold-silver alloy by vacuum distillation involves heating of the gold-silver alloy in a melting pot in high vacuum to the temperature of silver evaporation from the surface of its melt and silver condensation from the resulting silver-vapor mixture into solid state in the condensation zone of the cooled condenser. Silver condensation from the steam-gas mixture is carried out with creation of conditions for occurrence of crystallization germinal centers by localization of the condensation zone in the direction of steam-gas mixture flow movement from the pot to the condensation zone at a higher pressure of the steam-gas mixture. The following ratio should be complied with: Tcon. <Tmel, where Tcon. and Tmel. mean condensation temperature and melting temperature of the deposited silver.EFFECT: invention allows to increase the productivity of the device without emission of harmful and hazardous substances into the environment and to improve the purity of metal separation and reduce the process cycle time.11 cl, 1 dwg

Sintered material sintering device and method // 2608863
FIELD: technological processes.SUBSTANCE: group of inventions relates to sintered material sintering devices and methods. Sintered material sintering device contains sintered material bowl to be installed into furnace, mounted on support plate and having inner space for accommodation of sintered material as first inner space, it also contains enveloping bowl sleeve-shaped casing with sealed edge relative to support plate, forming inner space as second inner space, which is made with possibility to supply into it and remove from it of shielding gas with provision of eliminating sleeve-shaped casing lifting relative to support plate due to shielding gas excess pressure, wherein bowl is equipped with closing element, and first inner space is connected to second inner space by shielding gas flow.EFFECT: providing sintering at temperatures of 1,200 °C with no undesired sintered material colour changes or oxidation.17 cl, 3 dwg

ethod and system for controlling sintering // 2608256
FIELD: metallurgy.SUBSTANCE: present invention discloses a method and a system for controlling sintering. Method involves: detecting current position of sintering end point on sintering belt, moving at specified speed, determining relationship between current position of sintering end point and first predetermined position N, as well as ratio between current position of said point and second specified position M. [N, M] is range of optimum position of said point on sintering belt. Air flow rate or negative pressure in gas line is reduced, when current position of said point is less than N, and air flow rate or negative pressure in gas line is increased, when current position of said point is more than M.EFFECT: method reduces generation of inefficient vacuum and inefficient consumption of air in sintering process, reduced consumption of electric power consumed by exhauster unit, therefore eliminating negative effect of controlling speed of sintering belt on stability of quality of flow of charge and on control of following technological operations.5 cl, 4 dwg

Screw-tube furnace (versions) // 2608155
FIELD: furnaces.SUBSTANCE: invention relates to burning furnaces of continuous operation for thermal processing a material with controlled gas atmosphere and heating temperature in the continuous operation mode and with continuous stirring the material, in particular, to a screw-tube furnace. Screw-tube furnace includes a heat-insulating housing, electric heaters, a pipe-retort equipped with a loading and an unloading chutes, a branch pipe for air feed/intake and an uptake; a screw located inside the pipe-retort and made with the possibility of rotation from an electric drive; a gas duct, a dust collection system and a control instrumentation system, herewith the pipe-retort diameter is 1.4–2.5 times larger than that of the screw forming an above-screw space inside the pipe-retort. Screw-tube furnace can be made of two, three or four stages. Provided is the possibility of processing both powder and fine materials with the humidity of up to 70 % abs. and the content burnt out and highly volatile components from 5 to 95 %, herewith the dust entrainment makes ~0.5 % from the load.EFFECT: screw-tube furnace for processing powder and fine materials.18 cl, 4 dwg

olded ceramic articles annealing method and furnace // 2608097
FIELD: technological processes; furnaces and ovens.SUBSTANCE: invention relates to shaped ceramic articles annealing method, primarily, bricks, in furnace due to movement of several molded articles located in trains passing parallel to each other along longitudinally extending furnace section (1) with annealing zone (7), in which molded items (25) heating is carried out. Located next to each other trains (2, 3) travel in opposite directions (A, B), and of furnace loading with molded items (25) subjected to move in first direction (A) takes place on furnace section (1) first side (10), wherein on one of first sides (10) and located opposite relative to annealing zone (7) of furnace section (1) second side (9) performing loading of subjected to movement in opposite, second direction (B) molded articles. Molded articles (25) in each case of reversing cancellation are moved through annealing zone (7) and accordingly removed from it on opposite relative to their loading furnace section end (9, 10). In radiation zones (11), adjacent to both sides along furnace section (1) to annealing zone (7), molded articles, moving on one train and located well before annealing zone (7), are heated by heat emitted by molded articles, already removed from annealing zone (7) on adjacent furnace train travelling in opposite direction. In circulation zones (12) located on both sides of annealing zone (7) providing air circulation across furnace section longitudinal direction, and ratio of mass flow across circulating gas to mass flow rate of gas to be directed in furnace sections lengthwise direction is more than 10. Invention also relates to furnace for implementation of described method.EFFECT: increasing furnace arrangement reliability and more efficient energy consumption.12 cl, 6 dwg

Scrap submergence system // 2607281
FIELD: metallurgy.SUBSTANCE: invention relates to a furnace for processing metal scrap, including a charge well. Charge well comprises an open top chamber including side and base walls of a heat resistant material. Inlet is provided in a side wall of chamber for receiving molten metal. Ramp is provided adjacent side wall and an inner wall forms a central cavity. Ramp is disposed between inner wall and side wall, and ramp is generally inclined from an intersection with base wall to adjacent a top surface of inner wall. Cavity is in fluid communication with an outlet. Passage in inner wall provides fluid communication between inlet and cavity. Inlet and an outlet each receive a conduit and at least one of conduits can include an elbow joint.EFFECT: possibility of standardisation of charge well to increase efficiency of production.21 cl, 15 dwg

Blowing lance with direct ignition through retractable ignition lance // 2607072
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for vacuum treatment of molten metal by means of blast lance. Blast lance comprises an outer jacket, which extends along a blast lance longitudinal axis, where an oxygen guide runs within outer jacket and comprises an oxygen exit at end. Inside outer side surface there is a channel for combustible gas, which has outlets for exit of combustible gas at end. In lance there is an ignition device with an ignition tip for ignition of combustible gas mixture. Ignition device can move between extended position and retracted position. In extended position ignition tip acts on mixing area, in which combustible gas supplied to oxygen outlet and combustible gas exiting through outlets for combustible gas are mixed to produce a combustible gas mixture. In retracted position ignition device is retracted into a protective area for protection against splashes of molten metal.EFFECT: invention enables to reliably perform ignition of combustible mixture formed at end for purge gas outlet.13 cl, 16 dwg

Apparatus for hot forming powder materials // 2606823
FIELD: metallurgy.SUBSTANCE: invention relates to hot forming of parts from powder workpieces. Apparatus includes storage of powder workpieces, electric resistance furnace, inductor, press for hot pressing, die, mechanism for feeding powder workpieces from inductor into die and an extractor with a mechanism for removal of parts from die. Powder workpiece storage is made with a mechanism for feeding powder workpieces into electric resistance furnace and is arranged in front of its input. Electric resistance furnace and inductor are placed with vertical arrangement of heating elements in a housing closed with a thermal shield, are configured to hold powder workpieces in form of a column and are equipped with common mechanism for vertical displacement powder workpieces, configured for movement of former down from column of powder pieces from electric resistance furnaces into inductor. In lower part of electric resistance furnace there is a locking mechanism for column of powder workpieces, and in upper and lower parts of said housing there are devices for supply of protective gas medium.EFFECT: reliable operation of apparatus and higher quality of heating of workpieces.1 cl, 3 dwg
 
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