Furnaces and kilns and ovens and retorts (F27)
F27 Furnaces; kilns; ovens; retorts(13203)
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
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
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
FIELD: technological processes.SUBSTANCE: invention relates to tubular reactor with rotary chamber for biomass heat treatment. Reactor comprises reactor chamber, which is divided by annular sheets into several zones, and feeding tools attached to annular sheets, wherein at least one sheet provision is made for feeding tools for different directions of rotation.EFFECT: invention enables production of homogeneous product.7 cl, 3 dwg
FIELD: ventilation.SUBSTANCE: invention relates to a method of controlling the main exhaust fan and a system for implementing the method of control. Method involves obtaining an amount of the large gas duct arranged horizontally under the air curtain chamber and required for normal sintering, obtaining the required total negative pressure of the main exhaust fan by using, with the help of several data bases, the required negative pressure in the gas duct, negative pressure required for the flow rate in the pipeline, as well as negative pressure required for the flow rate at the air curtain window, and controlling the main exhaust fan according to the total required negative pressure of the main exhaust fan.EFFECT: invention enables to avoid losses caused by excessive amount of air consumption, thus saving energy.10 cl, 5 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to physics and metallurgy, namely to devices used in research and laboratory operations for measuring physical parameters of meltings. Proposed apparatus comprising a suspension system in the form of an elastic nichrome thread, on which a non-metallic sleeve is suspended, a mirror reflecting a light beam, crucible with melting sample located coaxially in a container secured to a ceramic rod connected to a non-metallic sleeve by means of a ceramic pin, and a heat shield for protection against overheating the non-metallic sleeve, according to the invention, the non-metallic sleeve is equipped with a non metallic fixing unit, fixed relative to the non-metal sleeve by means of three ceramic pins and made in the form of a box of four pairwise parallel rectangular plates, each of which has two slots for their mutual fixation and holes for installation of said ceramic pins perpendicular to the plates, each of said plates can be in contact with the non-metallic sleeve at continuous straight line to provide minimum thermal contact of said sleeve and said unit.EFFECT: invention is intended for non-contact measuring physical parameters of metal melting samples, for example, based on iron, cobalt and nickel, by photometric method based on measuring torsion oscillations of the crucible with the melting in vertical vacuum electric furnace, possibility of performing experiments without disruption, as well as reliability and accuracy of obtained results when determining kinematic viscosity and electrical resistance of metal meltings are increased.1 cl, 3 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for production of steel in electric arc furnaces with control of flicker parameters. In the method memory bank data on flicker is created by storage device, storing momentary flicker (MF) time dynamics depending on state and performance characteristics, MF time dynamics measurement during initial phase of melting and related characteristics of state and operating characteristics is performed using recording device, MF time dynamics comparison during initial phase of melting is performed using computing device with stored melting phases time dynamics of common flicker data bank taking into account state characteristics and operating characteristics, selection of time general dynamics with maximum MF matching is performed using computing device, as well as state characteristics and operating characteristics as predicted total flicker dynamics, advanced dynamic matching of further steel production process control in comparison of predicted general dynamics with preset limits for flicker is performed using control unit.EFFECT: invention allows to control flicker indices to be expected and with high degree of probability can be determined, on the basis of state characteristics and operating characteristics, which are recorded during first minutes in melting phase; as such flicker can be effectively alleviated and maintained below preset limit values.26 cl, 4 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for pre-heating of scrap before loading into furnace. Device includes bottom, side walls and ceiling, which together define a channel, transportation means extending in an axial direction of said channel from an entry port of channel to an exit port of said channel, for transferring scrap from said entry port to said exit port, wherein transportation means have a larger width compared to entry port than exit port.EFFECT: invention provides more efficient pre-heating of scrap.14 cl, 1 dwg, 1 tbl
FIELD: furnaces; dentistry.SUBSTANCE: invention relates to dental furnace. Furnace consists of sintering chamber for thermal treatment of restored parts of teeth. Sintering chamber is connected to negative pressure source via suction line. Valve mechanism is located between sintering chamber and suction line, and with its help line is closed in direction to sintering chamber to keep negative pressure in it. Suction line between valve mechanism and source of negative pressure is ventilated, in particular via connection with ambient air.EFFECT: higher quality of restored parts of teeth and reliability of furnace operation are achieved.13 cl, 2 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, in particular, to methods of protective scull forming on converter lining surface. Method consists in final slag leaving in converter, preliminary blowing of final slag with oxygen and magnesia briquetted flux addition into converter with subsequent flux modified final slag blowing with neutral gas. Between lining spraying additionally performing is magnesia briquetted flux addition in supplied into converter charging on scrap metal, wherein at each stage flux is added in amount of 2.7–8.0 kg/t of steel, spraying and melting are carried out at temperature of 1,580–1,680 °C, and used magnesia briquetted flux is composition containing magnesian component, containing periclase-carbon, in form of melting and casting units waste lining scrap and dolomite.EFFECT: enabling increased duration of vessel campaign period from 3,000 to 5,000–8,000 melts with considerable cost-cutting of used magnesian flux.2 cl, 2 tbl, 3 ex
FIELD: technological processes; furnaces and ovens.SUBSTANCE: invention relates to a rotary inclined furnace for processing aluminium scrap. Furnace comprises a lined body with a support ring, which rests on two rollers, a burner shield with a gas injection burner fixed on it with eleven mixers, a turning lined bowl with two lined chutes, a drive of the furnace rotation and a burner shield supply-discharge drive. Lined body has a heat-insulating layer consisting of a heat-insulating glass-fibre mullite silica felt and a layer of a chamotte lightweight material, which is packed with a layer of lining from a mullite silica ramming mass with a crust of slag lining. Burner includes an air flow rate control device, is installed with the inclination of 20° to the axis of the lined body with the possibility to feed gas to the burner through a pipe welded to a bracket secured on the rotary column. Furnace has a mounted on a trolley rotary lined bowl with two lined chutes, herewith one of the two lined chutes has on its bottom a chute attached thereto, which can move under the bottom of the upper one for increasing or decreasing the length of the mated chutes, the trolley moves along rails toward the lined body and backward by means of an electric drive, a rotary frame in the working position resting on the front and the rear supports of the rotary frame, the furnace can operate on both natural and artificial draft with a two-stage dust-gas cleaning plant for obtaining an ecologically clean process.EFFECT: provided is longer life of the furnace, reduced heat losses and harmful emissions into the atmosphere.7 cl, 12 dwg
FIELD: electrical engineering.SUBSTANCE: invention relates to heating elements. Heating element includes current leads and even number of series-connected coaxially arranged heating pipes, connected by links. Internal heating pipe is connected with one current lead by split current conducting adapter, which is on one side is rigidly connected with current lead, and on opposite side is in contact with internal pipe by sliding fit. External pipe is rigidly connected with other current lead by sliding conical fit.EFFECT: result is high specific heat output.1 cl, 2 dwg
FIELD: machine building.SUBSTANCE: invention relates to thin long articles thermal treatment furnace. Furnace consists of refractory hearth, refractory arch and conveying device for heated items movement along furnace length. Conveying device contains traction element and load-carrying elements, rigidly connected to each other. Conveying device traction element is made in form of shaft, installed with possibility of rotation, which is arranged inside furnace hearth. Load-carrying elements in form of discs with radial slots are rigidly fixed on shaft, made with possibility of heated products laying.EFFECT: result is reducing furnace length and enabling heated products single-piece dispensing.3 cl, 4 dwg
FIELD: technological processes.SUBSTANCE: group of inventions relates to high-emissive coating compositions and methods of their production. Thermionic coating composition for a substrate includes a dry mixture of substances increasing emission capacity of the coating, herewith the substances increasing emission capacity of the coating contain titanium dioxide, and substances, which increase mechanical strength. In another version the composition additionally contains a solution-based component containing phosphoric acid. Method of producing the coating involves determination of a specified level of the coating emission capacity, determination of concentration of titanium dioxide, determination of adhesion properties and manufacturing of the thermionic coating composition.EFFECT: technical result is increased heat emission by radiation.35 cl, 5 dwg, 4 tbl, 7 ex
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for regulating length of electric arc in an arc furnace. Method comprises measuring vibrations at a wall of furnace vessel, through which is determined a slag height (Hrel) of melt, wherein when at deviations of a determined actual slag height (Hrel) from a given value (S), control and/or regulation signals are output, through which is set electric arc length of at least one electrode by regulation of impedance of at least one electrode. Device comprises at least one structure-borne sound sensor for detecting vibrations at a wall of furnace vessel, computing unit configured to calculate an actual value of a slag height (Hrel) in furnace vessel, and a control or regulating unit for adjusting electric arc length of at least one electrode by regulating impedance of at least one electrode at deviation of actual slag height (Hrel) from specified value.EFFECT: invention provides fast response to change of slag height, wherein fuzzy logic-based control system generates correction coefficients for individual electric arc lengths over a short reaction time of approximately one second.28 cl, 2 dwg
FIELD: technological processes.SUBSTANCE: invention relates to method and apparatus for reducing melting. Plant includes loading device for solid carbon carriers and iron containing charge components, melting gasification area, which comprises stationary layer formed by solid carbon carriers and iron containing components of charge, lower section to receive liquid cast iron or, respectively, steel semi-finished product, and liquid slag, tap hole for discharge of liquid slag and liquid cast iron, oxygen blowing Tuyere for oxygen supply. At that, Tuyere are arranged in at least two spaced apart, in particular in vertical direction, and located parallel to each other Tuyere caissons zones, and distributed along horizontal plane around the perimeter of installation for reduction smelting, and in different zones of Tuyere caissons are shifted relative to each other. Vertical distance between Tuyere belts, in particular, vertical distance between tuyeres outlets, is less than or equal to horizontal distance between oxygen blowing tuyeres.EFFECT: invention provides reliable operation of the plant, higher efficiency.10 cl, 3 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, specifically to a method and a device for preliminary treatment of a rolled article. Method for preliminary treatment of a rolled steel article before hot rolling includes preliminary heating of rolled article in preheating furnace using burners, removal of scales in device for removal of scales and heating article in heating furnace using burners. Burner is fired at conditions lower than stoichiometric conditions, carbon carrier while holding article in furnace in reducing atmosphere. Further, method includes introduction of a first part of exhaust gas and oxygen into preheating furnace and post-combustion of first part of exhaust gas in preheating furnace. Amount of oxygen is selected to allow holding of article in preheating furnace in an oxidative atmosphere.EFFECT: providing energy-efficient heating and thorough release from scale.14 cl, 3 dwg
FIELD: metallurgy.SUBSTANCE: present invention relates to a method for extracting metal from metal-bearing slag, in which the metal-bearing slag is heated with mixing in at least one reactor and in which the liquid slag in a reactor is periodically mixed by an appropriately directed magnetic field by switching on and off the magnetic field over the course of 5 seconds to 10 minutes. Reactor with mixing is a reduction furnace with a variable magnetic field, preferably a direct current electric furnace, most preferably a reactor in the form of a melting chute or ladle. Displayed here is a device for extracting metal from metal-bearing slag, including a reactorwith mixing for heating the metal-bearing slag and an electromagnet to induce a magnetic field in such a way that liquid slag is mixed, wherein a switching device is provided for periodic operation of the electromagnet.EFFECT: higher degree of metal extraction from metal-bearing slag is provided.14 cl, 4 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used during shaft furnace charging. Charging installation comprises first and second collecting bins arranged parallel to each other, wherein each of first and second collecting bins has inlet hole to receive material and outlet hole for material charging into shaft furnace. Receiving bin is arranged to turn about horizontal axis of rotation and is designed for receiving and distributing material into one of first and second bins, wherein receiving bin is made with possibility of rotation at least between two transfer positions, wherein in the first transfer position receiving bin outlet is arranged coaxially with first collecting bin inlet opening, and in second transfer position is coaxially with second collecting bin inlet opening. Charging installation also contains material gate, related to receiving bin outlet opening, and drive mechanism related to material gate, for receiving bin outlet hole opening and closing, wherein drive mechanism is made with possibility to close outlet opening when receiving bin is in rest position and outlet opening when receiving bin is in any of first or second transfer positions. Drive mechanism is made with possibility to actuate material gate due to receiving bin turning movement.EFFECT: invention allows creating special material gate structure able to prevent charge material residue fall on closed sealing valve or against falling between two collecting bins.17 cl, 4 dwg
FIELD: fuel.SUBSTANCE: invention relates to a method of combustion of the main and the auxiliary fuel in a combustion furnace, to a device for injection of liquid oxygen into the combustion furnace and to the combustion furnace. Method involves introduction of the main fuel and the main oxidizer into the combustion furnace to form the main combustion zone, in which the main fuel is burnt with the main oxidizer, injection of liquid oxygen into the combustion furnace as an auxiliary oxidant to form a separate auxiliary zone for auxiliary oxidizer together with the auxiliary fuel. Disclosed are a device for injection of liquid oxygen into the combustion furnace and a combustion furnace.EFFECT: provided is the possibility of complete combustion of the auxiliary fuel in the furnace having considerably lower calorific capacity than the main fuel to produce a product of improved quality.15 cl, 3 dwg
FIELD: measuring equipment.SUBSTANCE: present invention relates to methods for electromagnetic measurement of a vertical filling level of a bath with electrically conductive material contained in a metallurgical vessel. Disclosed measuring system comprises: transmitting conductor (5) for generating an electromagnetic field when connected to an alternating power source, receiving conductor (6), which is arranged to sense electromagnetic field for generation of an output signal as a function of vertical filling level, wherein transmitting and receiving conductors (5, 6) are arranged inside metal casing (2), to co-extend with mutual spacing (d) to define spacing area (7) that faces containment volume (3) and extends along periphery of containment volume (3), in a substantially closed circuit, wherein spacing distance (d) is selected so that changes in output signal are influenced by change of electromagnetic field caused by local changes in amount of conducting material, adjacent to said spacing area (7), wherein part of spacing area (7) defines a vertical measurement region, in which spacing area (7) is slanted along periphery of containment volume (3) so as to diverge from horizontal and vertical directions of vessel (1).EFFECT: purpose of invention is to install a sensor for measuring level, independent of shape of metallurgical vessel, as well as to provide a sensor for measuring level, aimed at increasing signal resolution in vertical direction and improving signal quality.22 cl, 11 dwg
FIELD: technological processes.SUBSTANCE: invention can be used for high-temperature treatment of rod parts, including for formation of composite, for example glass-metal, materials and articles by diffusion welding of glass and metal billets units. Heating furnace chamber treated parts housing is made of ceramics and comprises detachable bottom and cover. Housing walls by height are formed, at least, from two identical hollow modules installed on each other with possibility of their detachable electric connection to corresponding outputs of adjacent modules. Heating device is made in form of spiral, fixed on each module chamber housing inner surface. Bottom is made in form of flat disk equipped in its central part with coaxial cylindrical protrusion, with possibility of placing on it with gap of module chamber housing lower end. Housing cover is made in form of flat disc having through coaxial opening and equipped with coaxial annular protrusion, having cylindrical groove, which inner diameter is equal to diameter of jointed with it module chamber housing upper end cavity.EFFECT: chamber ensures possibility of easy device adaptation for discharge of articles of different dimensions in height while maintaining high degree of chamber volume filling.3 cl, 3 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for pre-heating of transported scrap. Device includes bottom, side walls and ceiling, which together form channel, as well as carrier, extending axially from channel inlet to channel outlet, for transportation of scrap from inlet to outlet, besides at least one radiant burner is located between inlet and outlet, wherein radiant heat released by radiant burner is directed to scrap at carrier, which is equipped with gas duct with possibility of collection and transportation of gases generated by at least one radiant burner in place, separated from at least one radiant burner, and then supply into channel in form of heating gas, which is directed over scrap or into scrap before direction of scrap into furnace.EFFECT: invention provides effective pre-heating of scrap by means of radiation heating due to intensive contact of radiant heat and scrap.15 cl, 1 dwg
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry and can be used as a component of hydraulic binder for making cement and construction materials. Method involves firing lump magnesite in fixed bed in a furnace, heated by gaseous fuel, and subsequent crushing of burnt product. Firing is carried out in an annular furnace with a movable bottom, firing temperature of magnesite is maintained within range of 650÷800 °C with content of impurities in magnesite higher than 8.0 % and 650÷950 °C with content of impurities in magnesite less than 8.0 %. Thickness of magnesite layer on furnace hearth is kept at 45 ± 15 mm, gaseous fuel used is generator synthesis gas produced by coal gasification. Lump magnesite with particle size not more than 30 mm with content of fraction of minus 5 mm not more than 15 % is fired. In annular furnace is maintained under pressure not less than 500 Pa, and flue gases from firing furnace is used for heating of magnesite before firing.EFFECT: invention provides continuous process of firing magnesite in a furnace, control of composition of atmosphere in firing furnace by maintaining optimum vacuum therein, reduce volume of dust formation.3 cl, 1 dwg, 5 tbl, 3 ex
FIELD: melting furnace.SUBSTANCE: invention relates to design of a notch of a blast furnace for production of cast iron. Device comprises heat-resistant bricks located along the inner side of the furnace casing, a cylindrical housing passing through the furnace casing and directed to the heat-resistant bricks, and an annular sealing assembly located on the end of the housing near the heat-resistant bricks and containing the housing seal. Herewith the housing seal is arranged to provide an airtight seal of the housing along its periphery, and the seal of bricks - to provide an airtight seal of bricks along the entire periphery between the heat-resistance bricks and the sealing assembly.EFFECT: invention is aimed at elimination of gas leaks at the outlet of liquid cast iron.6 cl, 8 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for intensification of melting in arc steel furnace. Device comprises a combined tuyere-burner and a copper water-cooled housing in form of a prism with rectangular cross-section with a through longitudinal hole in middle section of prism, in which is inserted a combined tuyere-burner, and on periphery of cross-section of prism in housing there are channels for water cooling and a flange for its fixation on casing of furnace. In copper water-cooled housing, water cooling channels are made in form of longitudinal drill holes, into which are inserted pipes with clearance, wherein flow sections of drill holes and pipes are connected to each other. Ratio of total area of water-cooled surface of drill holes for passage of water to area of heat-absorbing outer surface of housing is equal to 0.4-0.82. Width of gap between walls of drill holes and outer wall of pipes is 0.1-0.3 of outer diameter of pipes.EFFECT: invention improves cooling efficiency of device for intensification of melting in arc steel melting furnace and improves its resistance.3 cl, 6 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to electrometallurgy, particularly, to arc melting and its furnaces for melting and heating of metal. Electrode holder consists of head with yoke and contact plate for current supply to graphitized electrode conducting sleeves for transmitting current from flexible cables to contact plate and spring-hydraulic mechanism clamp or release of the electrode, wherein at current-conducting sleeve outer surface along its length there are ribs in form of wave, which width by 2-10 times more than its height.EFFECT: invention allows to create rigid structure to prevent vibration electrode holder under effect of impact of short-circuit currents at minimum external dimensions of the cross section of sleeve, to reduce active and inductive resistance of current-carrying sleeve and reducing electric losses during operation of furnace by increasing perimeter of electrode holder section.1 cl, 3 dwg
FIELD: metallurgy.SUBSTANCE: invention can be used for maintenance of an electric melting furnace. Furnace consists of fixed bearing frame and supported on frame in working position melting vessel, a cart for changing vessel,to be displaced between parking position (P) parking and transfer position (Ü), having a retainer for melting reservoir, disconnecting melting reservoir in transfer position from bearing frame and mounted in retainer of cart for changing vessel transfer device, wherein by means of transfer device bearing frame can be dropped relative to transfer position (Ü) for changing from operating position (A) so that during lowering melting vessel first, is installed on retainer, and then being raised from bearing frame is detached from it, bearing frame is equipped with props to complete tilting.EFFECT: invention makes it possible to install lifting or tilting mechanism fixed at shaft and support melting vessel on a stationary holder, wherein cart for replacement of reservoir is used only for intended purpose.21 cl, 5 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to counterflow kiln for production of anodes. Furnace comprises chamber for material, burning channel made at both sides of chamber for material, front wall, and rear wall, channel for collecting volatile component, made over chamber for material, vertical channel for volatile component made inside front wall, vertical channel for volatile component made inside rear wall, vertical channel for volatile component in front wall therein is communicates with channel for collecting volatile component and lower level of channel for combustion, and vertical channel for volatile component in rear wall communicates with channel for collecting volatile component, second lower level channel for combustion, and middle section of channel for combustion, exhaust plate for volatile component located at inlet to lower level of channel for combustion, exhaust plate for volatile component located at inlets to second lower level of channel for combustion and middle section of channel for combustion, air preheating channel located below lower level of channel for combustion, exhaust plate of air preheating arranged at inlet to air preheating channel, air preheating channel therein communicates with rear wall of lower level of channel for combustion, first level of channel for combustion communicates with flue pipe, and sleeve for cooling water is located below chamber for material.EFFECT: higher maximum temperature and product quality.6 cl, 2 dwg
FIELD: fuel combustion methods.SUBSTANCE: invention relates to a method for fuel combustion and optimizing combustion thereof in partition lines of a rotary-burner multi-chamber kiln for firing carbon blocks, said kiln comprising heating chambers, fuel required for firing carbon blocks being partially injected by at least two heating manifolds directly controlled by a master controller which controls inputs/outputs of said manifolds. Method comprises automatic identification, by master controller, of relative position of one manifold relative to others when said manifold is connected to a grid, and operation of injectors of heating manifolds being organised by distributing operating sequences of injectors individually over time.EFFECT: preventing incomplete fuel combustion and improving quality of combustion.10 cl, 7 dwg
FIELD: technological processes.SUBSTANCE: invention relates to equipment for deformation, welding and sintering powder articles in vacuum, in a gas medium with low excess pressure and at high pressure of gases and high temperature. Proposed press comprises high-pressure compactions and series-arranged behind them vacuum seals arranged at connection points of: the housing with plugs and the male die, the gate with the plug, inspection openings and current leads with the movable plug. Besides, it is equipped with a cylinder for moving the plug fixed on the base of the bed. Its heat insulating chamber, the heater and the table are fixed on the movable plug, herewith the heat insulating chamber is equipped with tightly arranged transparent windows and gas feed tubes. In the heat insulating chamber there is a hole for passage of the male die equipped with a centering ring movable in the radial direction, installed on the chamber and preventing the heated gas outlet into the gap between the male die and the chamber. End of the male die is attached with a hammer isolated from the male die with intermediate gaskets and a heat clearance.EFFECT: provided is the press operation at the gas pressure up to 10 MPa and its reliability.1 cl, 1 dwg, 3 ex
FIELD: metallurgy.SUBSTANCE: invention relates to special electrometallurgy, particularly to electroslag casting of cooling tray of the metallurgical furnace. Method involves making a workpiece of the tray by electroslag remelting of copper electrode at a temperature of 1,200-1,350 °C in uncooled steel crystallizer, inner sizes of which correspond to dimensions and shape of the tray, workpiece is obtained in the form of bimetallic casting with steel coating on two mutually parallel surfaces of larger size and on three surfaces of smaller size, then steel coating is removed from one of the parallel surfaces of larger size of said casting to obtain copper horizontal surface of the working part of the tray for placement the furnace inside it, and on the opposite horizontal surface with steel coating used as outer part of the tray, grooves forming a channel for cooling liquid are milled, then the external part of the tray is covered with a steel sheet, then the steel sheet is welded along the generatrix sheet edge.EFFECT: invention allows creating a reliable and efficient cooled tray of the metallurgical furnace.1 cl, 3 dwg, 1 ex
FIELD: furnace; oil and gas industry.SUBSTANCE: present invention relates to tube furnace, which can be used for heating oil, oil products and other hydrocarbon mixtures. Furnace includes combustion chamber with burner communicated with heat exchange chamber, in which there product pipes, and burner includes gas holes and air duct. Ends of gas holes are arranged in combustion chamber around outlet of air duct, in combustion chamber there is an air flow swirler, product pipes are a tubular heat exchanger with transverse streamlined bundle of pipes, and in reservoirs of tubular heat exchanger there are partitions with formation of series-parallel circuit connection of pipes.EFFECT: proposed furnace has high power and efficiency.4 cl, 4 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, namely to DC electric arc furnaces. Furnace includes melting chamber housing with a working door, formed by metal shell and lining of layers of refractory non-electro-conductive material, drain chute, roof and crown electrode located along the axis of the melting chamber, bottom electrodes that are displaced relative to axis of the melting chamber, disk solenoid coils with a control unit, heat-sensitive elements in the nature of thermocouple junctions which are installed with possibility of measuring the temperature on the surface layer of lining of the housing of the melting chamber and under the layer of coating lining on the ring end face of the melting chamber, and are located at a distance of not more than 0.5 m from each other, control unit of disk solenoid coils, number of inputs of which is equal to the number of heat-sensitive elements connected to the appropriate outputs of the heat-sensitive elements, while the number of outputs equals to that of disk solenoid coils connected to outputs of the said unit, wherein the control unit of disk solenoid coils is made integral with low-voltage DC source in the form of the said programmed micro-controller. Furnace is equipped with a coolant source with a pipeline connected thereto by its end, while its other end is connected to the disk solenoid coils that are being continuously cooled, and disk solenoid coils are installed inside the housing of the melting chamber, are located in pairs and diametrically opposed between the layers of lining and can be connected to a DC source, wherein the axis passing through the centers of said coils are located at the same height level in the horizontal plane above the maximum level of molten metal and intersect in the center of the melting chamber.EFFECT: invention provides higher efficiency at 10÷15 % and efficiency increased two times due to increased service life of the lining layer and allows to reduce specific power consumption of not less than 5-6 % and improves environmental friendliness of the space around the electric arc furnace.7 cl, 2 dwg
FIELD: metallurgy; electricity.SUBSTANCE: invention relates to provision of metallurgical plant (1) with electric energy. Metallurgical plant (1) receives electric energy from independent network (4) for distribution of electric energy from at least one power plant (3) with at least one gas turbine. Separate units (21, 22, 23) receive electric power required for their operation at least for 80 %, in particular, at least for 90 %, through independent network (4) from said at least one power plant (3). By means of control device (5) control over electric power for one first separate unit (21, 22, 23) is provided on the account of at least one other of two or more separate units (21, 22, 23). Two or more separate units (21, 22, 23) include at least one steel making plant, having at least one electric arc furnace (EAF), and at least one separate unit (21, 22, 24, 25) for metallurgical process carried out before or after steel plant (23).EFFECT: high reliability.14 cl, 4 dwg
FIELD: metallurgy.SUBSTANCE: invention can be used for inducing flow of electrically conductive molten material in a furnace. Apparatus includes a furnace chamber and a port in fluid communication with furnace chamber and having an inclined lower wall, apparatus comprises a bidirectional induction unit mounted to inclined lower wall of port for inducing flow in molten material in port, a retractable channel plate assembly positioned in port to define an extraction flow channel for molten material between channel plate assembly and inclined lower wall, a drive arrangement for moving channel plate assembly into and out of port, including a sensor system for measuring level of molten material in port and a feedback system for providing information regarding position of channel plate assembly.EFFECT: invention enables to use bidirectional induction unit, which operates in two modes - mixing molten material inside furnace chamber and dispensing molten material from furnace chamber through port for casting or other needs.25 cl, 12 dwg
FIELD: heating.SUBSTANCE: invention relates to equipment for sintering powder items, diffusion welding of composite items in vacuum, in a gas medium with low excess pressure and the high pressure of gases up to 10 MPa and the temperature up to 2,500 °C. In the proposed vacuum-compression furnace on the movable plug beside the table there are: a heat-insulating cap, current leads with heaters and inspection windows for pyrometers measuring the product temperature at high heating temperatures in addition to thermocouples. Besides, the vacuum-compression furnace is equipped with high-pressure seals and in-series located vacuum seals behind them arranged at points of the housing connection with plugs, a gate with a plug, current leads and inspection windows with a movable plug, herewith the heat-insulating cap at compression processing is equipped with tightly arranged transparent lenses, to which from the heating working zone tubes are brought to supply the gas and create a gas curtain in front of the cap inspection lenses.EFFECT: easier furnace maintenance, higher reliability of its operation are provided.1 cl, 1 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to mining and metallurgical industry and can be used for burning of metallurgical raw materials on grid kiln. Grate of kiln consists of top and bottom support arms, remote plank and working medium is formed by upper working, lower and side surfaces. Width of the base of the lower bearing branch is 0.85-1.25 from body height and spacing plates are made below the level of working surface by 0.20-0.60 body height, on the side surface of the lower support cones are heat-removing fins.EFFECT: reduce thermal stresses in the body of the grate.1 cl, 4 dwg
FIELD: machine building.SUBSTANCE: vibration device is intended for delivery unit (21) serving to advance metal cage in longitudinal direction (X). Device contains two vibration mechanisms (25, 26) located on opposite sides of delivery unit for providing movement of above said metal cage. Each of vibration mechanisms comprises first set of said eccentric weights (31, 32, 33), which centres of masses (B) are oriented in parallel directions to each other, and second set of said eccentric weights (34, 35), which centres of mass are located with angular shift relative to location of those of first set of eccentric weights.EFFECT: large metal cage cargoes delivery along delivery track, limiting of mechanical stresses to support elements of eccentric weights.12 cl, 17 dwg
FIELD: gas industry.SUBSTANCE: invention is related to destruction of waste with combustion and can be used in production of pyrolysis gas by means of thermal treatment of organic substance using pre-heated solid bodies essentially the same size. Proposed plant comprises pyrolysis furnace operating without oxygen at the pre-heated solid bodies essentially the same size, heating system for heating of solid bodies and delivery system of solid bodies, to transportation of heated solid bodies from heating system into the pyrolysis furnace and cooled solid bodies from furnace heating system. System for heating of solid bodies consists of several heating modules, with that heating buckets are arranged to turn around a common horizontal axis, and every bucket is made with the possibility of independent rotation, while the heating system additionally contains a guide rail for loading of solid bodies located above the buckets and equipped with carriage for loading of crucibles, and the guide rail for discharge of heated solid bodies arranged under buckets and equipped with a trolley for unloading of crucibles, with that, the modules and the carriage are made with the possibility of alternate actuation for delivery of heated solid bodies alternately with a uniform flow rate.EFFECT: invention allows optimizing of the plant for production of pyrolysis gas due to design features of gates and heating modules.13 cl, 7 dwg
FIELD: metallurgy.SUBSTANCE: present invention relates to metallurgy and can be used, for example, in a Vanukov furnace. System is additionally equipped with a regulator to correct the ratio of charge/oxygen-air mixture depending on the temperature in the exhaust-heat boiler, a heat-recovery boiler temperature sensor installed on the boundary between the evaporation and convection zones of the heat-recovery boiler, a temperature control in the heat-recovery boiler depending on the flow of cooling water into the uptake of the furnace in front of the heat-recovery boiler, a device for measuring the temperature of the heat-recovery boiler with a preset temperature indicator, a temperature sensor switch, wherein the temperature sensor is connected to correcting temperature regulator, the correcting regulator temperature is connected to the regulator of the ratio of charge/oxygen-air mixture, the temperature sensor switch is connected to the correcting regulator of the ratio of charge/oxygen-air mixture, the regulator of the temperature in the heat-recovery boiler depending on the flow of cooling water into the uptake of the furnace in front of the heat-recovery boiler and the device to measure the temperature in the heat-recovery boiler with a preset temperature indicator.EFFECT: use of the invention ensures stable processes of charge melting, increases the resistance and heat efficiency of the system operation.1 cl, 2 dwg
SUBSTANCE: in method in side wall (201, 301) of industrial furnace (200; 300) there is at least one tuyere (206, 306). Inside furnace (200; 300) through tuyere (206, 306) second oxidiser is supplied with oxygen content of at least 85 wt% with sound speed or higher in form of a jet (207; 307) of second oxidiser. Method provides flow of jet (207; 307) of second oxidiser in horizontal plane over material (202, 302), between and substantially parallel to two consecutive rows (205a, 205b; 305a, 305b) of arched burners (203, 303). Amount of second oxidiser supplied in unit time is balanced so that oxygen fed by means of second oxidiser makes up at least 50 wt% of total oxygen supplied per unit time in furnace (200; 300).
EFFECT: providing uniform heating of material.
11 cl, 5 dwg
SUBSTANCE: invention relates to method of loading material containing lumpy coal-containing material and preferably hot iron containing material, into smelting gas generator of reduction-smelting unit to allow controlled distribution of material. At that, lumpy carbon material and preferably hot iron containing material are combined before and/or during their occurrence in melting gas generator. There is possibility of changing ratio of combined amounts preferably of hot iron-containing material and lumpy carbon containing material.
EFFECT: method is characterised by that combined amount preferably hot iron-containing material and lumpy carbon containing material is distributed by means of dynamic distribution device in cross section of smelting gas generator and ratio of combined amounts of preferably hot iron-containing material and lump coal-containing material is set depending on position of dynamic distribution device.
19 cl, 2 dwg
FIELD: technological processes.
SUBSTANCE: invention relates to a device for thermal oxidation and carbonization of grained active coals. Device comprises a loading chamber, a rotary drum with an inner vessel of pipe-in-pipe type, a furnace with a transition channel located in its lower part, having an input for flue gases and supply of air for dilution of flue gases and outlet into an intertubular space, and a furnace unloading chamber. Ratio Vvessel/Vfurnace is 1:1.4.
EFFECT: simplified design and possibility to perform thermal oxidation and carbonization within the temperature range from 300 to 750 °C.
3 cl, 1 dwg
SUBSTANCE: invention relates to metallurgy and can be used for opening and closing outlet hole of metallurgical melting vessel. In an electric arc furnace, in bottom region of which there is a wall portion with an opening, and a hole located device for moving blocking elements in a direction which is perpendicular to normal to wall surface portion in region of opening, device holds locking elements on wall portion in such a way that they fit snugly to wall portion. In order to close outlet device under hole locking member is shifted, which has no through holes, and in order to open outlet device under hole, locking member is shifted, which has at least one through-hole, so that liquid metal can flow from melting vessel through hole in locking member.
EFFECT: invention allows to reliably open and close outlet hole without wear.
3 cl, 4 dwg
SUBSTANCE: invention relates to metallurgical heat engineering. To achieve technical result, device comprises parallel rows of stationary and moving shaped beams arranged within length of article perpendicular to direction of its movement, wherein stationary and moving shaped beams have working profile of same shape, which is slope, changing into stop peak of which changes into next slope, movable beams are arranged relative to stationary so that their peaks profiles are spaced along length of furnace at a distance exceeding radius of transferred article.
EFFECT: technical result is simplification of device.
3 cl, 5 dwg
FIELD: metallurgy; processing and recycling of wastes.SUBSTANCE: invention can be used in power engineering for coal combustion or gasification. Melting unit comprises smelting chamber with oxygen fuel burners, heater of charge materials by heat of smelting chamber exhaust gases, device for metal and slag separate tapping, device for charge materials heater gases heat recovery. Housing of melting chamber is made up of detachable cooled upper and, uncooled lower parts, housing detaching line is located at 200-400 mm higher than preset maximum level of liquid metal in metal bath. Detachable cooled top part of housing is made in form of two-wall metal shell with sealed cavity filled with liquid metal heat carrier. Lower uncooled part is lined with refractory lining and installed on support platform made with possibility of inclination.EFFECT: invention is aimed at reduction of total thermal and electric energy consumption for production of commercial products, easier maintenance of unit by personnel.8 cl, 3 dwg
FIELD: metallurgy.SUBSTANCE: invention relates to a device for burning precursors of oxide catalysts. Device comprises a rotating furnace with a calcination tube having open ends at both terminals; a pair of hoods, each hood covering each open end of calcination tube; and a pair of rings, each ring sealing a gap between calcination tube and hood, wherein rings are directly or indirectly fixed on an outer surface of calcination tube; a groove is provided along a circumferential direction of ring at a contact surface side between ring and hood; a sealed chamber surrounded by hood and groove is formed; and both calcination tube and rings rotate in a circumferential direction of calcination tube while keeping hood in contact with both sides of groove. Invention also discloses a method of producing an oxide catalyst in said device, a method of producing unsaturated acid and a method of producing unsaturated nitrile using a catalyst obtained using said method in said calcination device.EFFECT: ensuring long-term maintenance of inner space of furnace in atmosphere of inert gas.23 cl, 9 dwg, 3 tbl, 23 ex
FIELD: construction.SUBSTANCE: invention relates to cement production. Plant comprises first step for crushing raw material to produce raw powder, second step for burning and sintering of raw powder with formation of cement clinker, third stage for cooling of sintered cement clinker and fourth stage for crushing sintered cement clinker with formation of cement, wherein first system and fourth system are integrated into structurally unified grinding apparatus in which each of said first and fourth systems are made in form of circulation grinding system with separator. Note here that said system is equipped with at least one feed pipeline for gas supply to first and fourth circulation grinding systems of said second and third grinding systems to allow separate gas feed to said first and fourth circulation grinding systems.EFFECT: no necessity to stop plant during maintenance or repair of one of grinding stage due to switching of different assemblies and high efficiency of plant.4 cl, 1 dwg
FIELD: cooling.SUBSTANCE: present invention relates to coolers for cooling hot sintered to produce cement clinker. Cooler is intended for passage of cooling gas (107) almost perpendicular to direction of transportation through layer of hot sintered clinker with heat extraction from it, comprises device for movement of hot clinker with vented hearth, through which cooling gas is supplied in form of covering of movable plates located in direction of movement, at that to ensure movement of hot clinker at least two adjacent plates are made with possibility of simultaneous movement in direction of movement and step-by-step, unequal in time of movement in opposite direction of planks, on which there is layer of hot sintered clinker, are made in direction of movement with different configuration reach average speeds of movement, differing from each other by their different friction engagement with layer of hot sintered clinker, and providing drawing said layer in area of quick movement and its compression in field of slow movement. Disclosed is method of cooling hot sintered clinker to produce cement.EFFECT: higher efficiency of heat energy recovery.10 cl, 7 dwg