Furnaces and kilns and ovens and retorts (F27)

F27            Furnaces; kilns; ovens; retorts(13260)

Improved method of mass production of phosphoric acid with application of rotation furnaces // 2642651
FIELD: chemistry.SUBSTANCE: method involves the following steps: (1) primary processing of raw materials, (2) preparing internal areas of the granules, (3) forming composite pellets, (4) restoring composite pellets on heating method, and (5) hydrating and absorbing phosphorus.EFFECT: energy-saving, environmentally safe and highly efficient process, which allows to produce high-quality phosphoric acid.13 cl, 20 dwg

System and method for reducing powder iron ore in fluidized bed // 2642252
FIELD: metallurgy.SUBSTANCE: invention provides high-speed gas treatment which makes it possible to increase the rate of iron ore reduction and increase gas treatment efficiency of a single effective cross-section of the boiling layer. The coefficient of iron ore reduction is increased due to oxidizing processes. By means of parallel lines through which the reducing coke gas passes, the volume of gas passing through each individual boiling layer is reduced.EFFECT: invention enables highly efficient reduction of powdered iron ore in the boiling layer at near atmospheric pressure.8 cl, 1 dwg

Plant for loading charge materials into induction furnace for melting ferrous and nonferrous metals // 2642214
FIELD: heating.SUBSTANCE: invention relates to an installation for loading a batch into an induction furnace. Installation contains a loading bin, a vibrating machine movable along the track with a batch loading device, a loading tray, a vibrating mechanism, in accordance with the invention, it is provided with a device for removing contaminants from the batch during its charging into an oven, consisting of a grid with apertures, a storage bin and a box with a handle for removing contaminants, guides and two locks securing the box to the guides, note here that support are secured at vibrating loader welded frame to fasten the loading chute with loading chute arranged there above, the loading chute has a rear and two side walls and is welded of sheet steel, the vibrating mechanism of the machine consists of four unbalanced centrifugal vibrators, which are fixed on four plates-brackets welded to the side walls of the loading chute, and there is the slip, welded to the edge of loading chute, in the middle part of the frame on a steel plate welded to it there is a drive for a mobile vibrating machine moving down the rails along a row of furnaces, in this case, the device for loading a batch into the movable vibrating machine consists of four hoppers supported by four columns, while a support platform with a ladder is welded to two columns, in addition, the hoppers are equipped with pneumovibrators and stirrup with a pneumatic drive, the weighing of the batch is carried out on electronic platform scales, the feed of the batch from the batch storage to the hoppers is carried out by grooved belt conveyors, and the movable vibrating machine unloading into the hopper is performed on a steel slime located under each hopper.EFFECT: higher reliability, mechanized feed of charge materials into an induction furnace.4 cl, 5 dwg
ethod of cleaning melt surface when growing germanium monocrystals // 2641760
FIELD: metallurgy.SUBSTANCE: essence of the invention consists in extraction of slags (oxide films) from the melt surface, and from crucible walls below the level of germanium melt in the crucible. The method consists in collecting the most part of all available oxide films on the melt surface and below melt level in the zone where it adjoins the crucible by sticking thereof to a preliminarily grown crystal. The result of efficient melt cleaning is achieved by adjusting the rotation speed of the crucible, crystal, the crucible position in a heat unit, as well as consumption of working gas (argon), wherein maximum high concentration of slag on the melt surface of crystal growth zone is achieved, and it facilitates their extraction on the preliminarily grown crystal. The preliminarily grown crystal is subjected to 2-5 cycles of sharp pulling with separation of the preliminary crystal from melt and then its subsequent complete immersion into the melt, which provides separation of slag impurities from the crucible below the melt level with subsequent floating thereof on the melt surface. Subsequent drawing up the preliminary crystal in each cycle provides collection of oxide films from the melt surface onto crystallisable surface of the ingot.EFFECT: yield of monocrystals with significantly lower dislocation density, reduced risk of twinning and polycrystallisation of the ingot during the growing process and reduced average time of the growth plant working cycle.2 cl, 2 ex

Cooler grate with shearing grate grids // 2640701
FIELD: machine engineering.SUBSTANCE: grate has a horizontal base and a plate inclined thereto and having through passages for cooling air and refracting to form a pushing platform. In the inclined plate, the angle of inclination (α) which is relative to the horizontal in the range from 10° to 30°, there are cavities made with formation of alternating benches, at that the bottom of the cavities is concave and has a slope increasing in the movement direction of the cooling material, and in vertical-longitudinal section of the grate it has a surface contour in the form of a broken line, in which there is a section forming a slope of the bench in movement direction of material, and made with inclination (β) relative to the upper surface of the inclined plate of the grate from 10° to 45°, wherein the through passages for cooling air are made in the walls of the cavities, and the bottom wall of the cavities is made with a bend, which angle (γ) is from 90° to 170°.EFFECT: grate strength and its operating life is increased without increasing metal capacity, accelerated cooling of the hot material.5 cl, 3 dwg

Clamping device for electrode // 2639900
FIELD: metallurgical engineering.SUBSTANCE: device includes at least one power generating means configured to apply radial force to the electrode and a flexible peripheral tension element configured to receive a reactive force directed from the electrode and distributing it around the periphery of the electrode. The power generating means includes a dislocating means in the form of a spring, the first end of the spring being attached to the electrode while the second end is disposed radially outwardly relative to its first end, and the end areas of said flexible peripheral element are biased in the angular direction relative to the longitudinal axis of said dislocating means.EFFECT: reducing the size and weight of the spring due to the optimal distribution of forces, using the device for heavier solid electrodes requiring less expansion, without an external support frame to counteract the forces applied by the springs.18 cl, 4 dwg
ethod of producing high-strength maraging steel // 2639190
FIELD: metallurgy.SUBSTANCE: invention relates to the production of high-strength maraging steels microalloyed with rare earth metals (REM), and can be used for manufacturing high-loaded parts of large cross-section, force parts operating from -70 to 400°C under high load conditions, for example, gas turbine engine shafts, parts of chassis, wing and other parts used in aircraft engineering and in mechanical engineering. Method includes loading charge containing iron, nickel, molybdenum, cobalt without wastes into vacuum induction furnace, its melting and deoxidation of rare-earth metals, introduction of titanium, forced melting followed by introduction of magnesium and calcium, melt casting, production of ingot and its further remelting in vacuum arc furnace. Nickel oxide is introduced into vacuum induction furnace after charge melt at rate of 0.45-0.55% of melt weight with holding for 15-30 Min at t=1600-1650°C, after that yttrium, dysprosium, neodymium, cerium, lanthanum in amount of 0.01-0.05% of each element are introduced as rare-earth metals in order to increase degree of their deoxidising capacity.EFFECT: invention makes it possible to reduce content of harmful impurities of carbon, nitrogen and sulphur, increase strength, plasticity and impact viscosity indexes, prevent formation of carbide and carbonitride grids at slow cooling from high temperatures after deformation.2 cl, 1 tbl

Brick connection system // 2639179
FIELD: construction.SUBSTANCE: arch bridge structure is formed in a system of refractory ceramic bricks made with two elements of the geometric closure in the X and Y directions, which simultaneously stabilise the connection in the Z-direction.EFFECT: it is possible to arrange bricks with a continuous connection in a simple way not only in the X and Y-direction, but also in the Z-direction of the coordinate system.12 cl, 5 dwg
ulti-chamber furnace for vacuum cementation and hardening of gears, shafts, rings and similar treated workpieces // 2639103
FIELD: machine engineering.SUBSTANCE: invention relates to the multi-chamber furnace for vacuum cementation and hardening of separate workpieces, such as gears, shafts and rings. The furnace has three technological chambers made in the form of a heating chamber, a cementation chamber and a diffusion chamber which are placed one above the other with formation of vertical arrangement. Said technological chambers are located between two transportation chambers with built-in mechanisms for loading/unloading of workpieces to be processed into/from the separate technological chambers. Each technological chamber is equipped with graphite heating system with thermal insulation and mechanism of step feed.EFFECT: strength and compactness of structure.5 cl, 5 dwg

Device and method for sequential melting and refining by continuous method // 2639083
FIELD: metallurgy.SUBSTANCE: process includes melting and refining of material subjected to processing at different pressures in different chambers with heat sources. At that, the process is carried out continuously by transferring liquid conductive material from the first processing chamber to the second processing chamber by creating pressure difference. The transfer of liquid conducting material is effected by creating pressure difference in combination with electromagnetic effect on the flow rate of liquid conducting material between processing chambers by such means, which create a stray electromagnetic field providing slowing and/or stopping the flow of liquid material. The invention is used for processing of metals, semimetals and ceramics, for example, for the manufacture of alloys and/or refining materials.EFFECT: improvement of the device.14 cl, 3 dwg

ethod for melting metal material in melting unit and melting plant // 2639078
FIELD: metallurgy.SUBSTANCE: at the loading stage, the first sub-operation is carried out, on which said metal material is loaded in an amount from 25 to 45% of total amount of molten material which is contained inside the furnace before the tapping stage and subjected to tapping after completion of the melting stage, the second charging and melting operation, at which the rate of metal material supply is reduced by means of a control device, to maintain the amount of solid mass of said metal material in gradually formed liquid metal bath, the third sub-operation, in which the feed rate is further reduced until stopping of loading process to ensure complete melting of all metal material in the melting furnace. The tapping stage is performed when the entire mass of solid metallic material is melted. The melting furnace comprises a roof covering the body and made separate from the latter, and a panel arranged between the body and the roof. There is a hole in the panel for installing said supply means there through. Said body has depth D and the lower edge of said opening is distanced in height from the lower edge of the panel by distance from 0.3 to 3D.EFFECT: invention makes it possible to reduce heat losses from the bath of molten metal, reduce wear of heat-resistant coating of the furnace walls, and reduce maintenance time.14 cl, 5 dwg
Cap unit for high-temperature thermochemical activation of coals // 2638390
FIELD: machine engineering.SUBSTANCE: cap unit with a gas flow vibration modulator comprises a hermetic body, a cylindrical vessel (2) for placing the activated material, heaters (4), a circulation fan (3) located under the container with material, two coaxial perforated cylindrical inserts (7 and 8) for loading the activated material therebetween and located inside the container for material. The housing is formed by the outer heat-insulating and the inner protective caps (9 and 1). The lower edge of the protective cap shell (1) is immersed in the sand gate. The cylindrical vessel (2) is installed inside the protective cap (1) with a gap from the body wall. The heaters (4) are arranged in the gap.EFFECT: increased uniformity of activation in height and thickness of activated material layer due to intensification of chemical heterophase processes, diffusion transfer, heat and mass exchange in particles during material conversion.4 cl, 1 dwg

ine kiln for roasting carbonate rocks // 2638268
FIELD: mining.SUBSTANCE: mine kiln comprises a lower mine and an upper circular mine entering into its cavity forming a gas channel. The said mines are interconnected with a metal structure with air-cooled metal ring at the base of the upper mine. The walls of the upper mine located above the metal ring in the area of the gas channel are made of refractory bricks. The metal ring is rigidly connected to the air-cooled metal beams mounted transversely and resting on the housing of the lower mine.EFFECT: simplified design of the mine kiln and reduced cost of its manufacturing.3 cl, 2 dwg

ethod and device for producing cement clinker // 2638059
FIELD: chemistry.SUBSTANCE: raw meal is preheated in the preheater using hot exhaust gases from the clinker furnace, wherein heated raw meal, which can optionally be calcined in the calciner, is fired to produce clinker in the clinker furnace, the heater comprises, at least, one of several cyclone branches suspended heat exchangers, through which furnace exhaust gas is sequentially flowing and in which raw meal is preheated in several steps, the partial furnace flow of off-gas is withdrawn such that only the remaining residual furnace waste gas stream is used to preheat raw meal, the withdrawn partial furnace waste gas stream and the furnace effluent from the last cyclone overhead heat exchanger (9) in the furnace flue gas stream flow are supplied on thermal utilisation, being mixed with each other or separately. An installation for producing the cement clinker, in particular for carrying out the said process, comprising a clinker furnace (2), which is connected to a clinker cooler (6) on the outlet end side and connected to a heater (3) at the outlet side and, optionally, to the calciner (4), the heater (3) comprising, at least, one of several branches of the cyclone suspended heat exchangers (8, 9, 10), through which exhaust gas of the furnace can consistently proceed along the flow path, in which raw meal is preheated in several stages, and to divert a partial stream of furnace exhaust gas from the flow path provides a discharge duct (16), which outlet duct (16) and hot flue gases (13) coming from the last cyclone suspension heat exchanger (9) in the flow direction of furnace exhaust gas located with the possibility of mixing these furnace exhaust gases and supply them to the thermal disposal or feed them on a heat recycling separately. The invention is developed in dependent claims of the invention formula.EFFECT: improving the efficiency of the method for the production of cement clinker.19 cl, 2 dwg

ethod and device for detecting leakage in area by at least one furnace cooling unit and furnace // 2636795
FIELD: machine engineering.SUBSTANCE: in case of leakage, liquid coolant from the at least one cooling device flows into furnace flame space. A representative partial flow is separated from exhaust gas stream from furnace gas for a predetermined period of time. The condensation of vaporous constituents contained in partial stream (30 a) is performed, and the resulting stream of condensate is determined (10) and compared with threshold value of the condensate stream. Presence of liquid coolant leakage is determined when the condensate stream (10) exceeds the threshold value of the condensate stream.EFFECT: increased accuracy of determination.25 cl, 3 dwg

Arc furnace // 2636793
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and an arc furnace having a roof for closing a furnace metal receiver and a rotation device which is movably mounted for movement in the vertical direction with respect to the rotation device which has a lock made for detachable fixation of the roof. The roof is arranged for fixation in the vertical direction by the rotation device lock and separation from the furnace metal receiver during movement in the vertical direction. The invention makes it possible to dispense with an articulated cylinder due to vertical movable installation of the furnace metal receiver together with the roof which results in saving of necessary structural elements and time-consuming intensive mechanical treatment of a roof lifting mechanism. In addition, the roof and the rotation device are not tilted together with the furnace metal receiver, so that it is possible to discharge simultaneously during energy supply to the furnace or to electrodes.EFFECT: increased furnace efficiency.8 cl, 3 dwg

Sealing gate for furnace for continuous heat treatment of fiber carbon material // 2636776
FIELD: machine engineering.SUBSTANCE: sealing gate for the furnace for continuous heat treatment of the carbon fiber material comprises a body 1 with a longitudinal through passage 2 for the material to be treated 3. The body 1 is made in the form of two aligned sections - a receiving section 4 and an outlet section 5. On one side, the body 1 is equipped with a flange 6 for fastening to the furnace working chamber and flaps 7 at the channel 2 outlet. Above and below the channel 2 in the receiving section 4 heat-insulated heated chambers 8 are placed, the lower one has a cavity 9 with nozzles 10 for process gas heating. In the side wall of the receiving section 4 channel 2, a window 11 is provided for communicating via a heated branch pipe 12 with a burner 13 for exhaust gases combustion. The burner 13 is provided with a slide gate 14 to adjust its outlet section.EFFECT: increased efficiency of heat treatment by increasing the gate tightness.2 cl, 4 dwg

Sealing gate to conveyor furnace for continuous heat treatment of chemical fibre in manufacture of carbon fibrous material // 2636541
FIELD: machine engineering.SUBSTANCE: gate has a body 1 with a flange 2 for attachment to a furnace working chamber 3 and a longitudinal rectangular through channel 4. The through channel 4 is made open at a first end which is associated with input or output port 5 of the working chamber 3. At a second end opposite to the first one there are seals 6 providing sealing when contacting the processed fibre 11 moving along the channel 4. The gate also gas supply means in the form of manifolds 25. The second end of the through channel 4 is provided with a pair of walls 7 rigidly interconnected and inclined to the axis of the channel of walls 7 which are engageable with the seals 6 for their interaction (movement relative to each other). The seals 6 are pressed against the inclined walls 7 by means of adjustable clamps 18. For moving the seals 6 along the inclined walls 7 during opening-closing of the gate, a movement mechanism is used that is made in the form of two pairs of upper 12 and lower 13 movable parallelograms connected to each other by central balancing links 14, and a pair of eccentric drives 16 locked by an axle 15 and installed in the upper channel wall 4. Each seal 6 is made of a pack of compressed heat-resistant tissues and having an inclined surface 9 conjugated with the inclined wall 7, and a horizontal working surface 10 formed by the ends of cloth threads similar to a brush. The horizontal surface 10 is in contact with the processed fiber 11. The eccentric drives 16 are connected to links of the lower pair of parallelograms 13. On horizontal links of parallelograms 12, 13 there are seals 6 secured by means of swinging shackles 17, and adjustable clamps 18 of the seals 6 are mounted on the inclined walls 7.EFFECT: increased heat treatment efficiency of the fibrous material by improving the gate sealing quality.3 cl, 2 dwg

Dust collector for blast-furnace gas // 2636340
FIELD: metallurgy.SUBSTANCE: blast-furnace gas collector (10) comprises a settling chamber (12) which is formed in a container (11), a feed channel (13), arranged to supply blast-furnace gas inside the settling chamber (12), a distributing chamber (15) which is provided above the settling chamber (12) and is in communication with the upper part of the settling chamber (12) and cyclones (16). The cyclones are arranged around the settling chamber (12) and each has an air inlet (163) in communication with inner part of the distribution chamber (15).EFFECT: improved dust collection performance.6 cl, 10 dwg, 5 ex

Device and method for introducing oxygen into gasification process in fluidized formation under pressure // 2635631
FIELD: machine engineering.SUBSTANCE: oxygen lance comprises three pipes arranged coaxially with respect to each other. An outer pipe 6 is arranged to pass the superheated steam 7. An inner pipe 2 leads to a middle pipe 4 and comes to a nozzle type cone before its mouth and is configured for passing oxygen 1 with temperature not exceeding 180°C. There is a temperature sensor 3 in the inner part of the inner pipe 2 that almost completely reaches the mouth of the outer pipe 2. The mouth of the middle pipe 4 further extends relative to the moth 8 of the outer pipe 6. The method for introducing oxygen into the fluidized-formation gasification reactor operated according to the Winkler method comprises supplying wet gas to the outer pipe under pressure by the oxygen lance exceeding the pressure in the fluidized-formation gasification reactor. The oxygen 1 is passed through the inner pipe 2 under a pressure higher than the pressure in the fluidized-formation gasification reactor. Wet gas is discharged from the mouth 8 of the outer pipe 6 as an external flow around the mouth of the middle pipe 4, and the free jet 10 is discharged. The flow velocity of discharged wet gas is higher than the velocity of the discharged gas from the inner pipe 2.EFFECT: invention makes it possible to provide efficient, safe and accessible introduction of oxygen into the gasification process in the fluidized formation under pressure above 10 bar as well.14 cl, 2 dwg, 4 ex

ethod and system to control amount of air of agglomeration car air box // 2635590
FIELD: metallurgy.SUBSTANCE: each valve in the agglomeration conveyor has a valve. The air quantity of a given air chamber is determined and the valve opening degree is adjusted for the other chamber. Said adjustment is carried out according to the data on the air quantity of the given air chamber and the relation between the air quantity of each air chamber recorded in the database, and the degree of opening of the valve in order to allow the air quantity of the other air chamber to be in accordance with the air quantity of the given predetermined air chamber. As the actual amount of air in the air chamber is in accordance with the required amount of air as far as possible, the situation is therefore excluded in which the proportion of the active air in the air chamber gradually reduces.EFFECT: reduction of the amount of inactive air with guaranteed quality of agglomeration products.12 cl, 5 dwg, 2 tbl

Device for electric supply of melting furnaces // 2635497
FIELD: metallurgy.SUBSTANCE: invention relates to the field of metallurgy and can be used for electric connection of the melting furnace to a current source. The connecting device comprises at least one contact body, which is connected by means of power cables to the current source, and at least one shaped portion as part of electric socket on the melting furnace. A movement device is provided for transporting at least one contact body from the initial position to the connection position, which is configured to provide electrically conducting connection with a geometrical closure of the contact body and a special piece by inserting the contact body into the special piece. One special piece has a seat with a centring function for the contact body. The seat has the shape of a negative truncated cone, and the contact body has an appropriately shaped positive truncated cone shape.EFFECT: automatic connection and disconnection of electrical connection with minimal cost.8 cl, 3 dwg

Continuous furnace // 2634540
FIELD: machine engineering.SUBSTANCE: guide chute for the continuous furnace with side delivery of billets has support and side guides surfaces and is arranged with the possibility of installation along the billtes delivery direction from the furnace. The support and side guiding surfaces of the chute are made of hollow elements filled with bulk damping fire-resistant material to overflow from the hollow element portion with distorted shape of its cross section from the force effect of the billet falling into the hollow element portion, in which there is no effect of said force and restoration of the distorted shape of the hollow element portion cross section. The hollow elements are closed with plugs at their ends that are configured to be installed and provided with movable connection of their subsisting conical surfaces with subsisting conical surfaces of the furnce frame side walls and brickwork of the furnace side walls.EFFECT: improved operating reliability of the continuous furnace and reduced operational costs.4 dwg

Sets of burner panel and/or water-cooled injector, device of burner panel and/or water-cooled injector and ways of its application // 2634523
FIELD: metallurgical engineering.SUBSTANCE: panel includes the first and the second cooling water circuits passing through the inner part of the panel between the inlet and outlet, at least one hole for installing the burner and/or the injector, and tools for reversibly attachment to the outlet of the first circuit and to the inlet of the second circuit in the form of a removable flexible hose or rigid pipe with the possibility of providing a flow of water without leaks in series through the inlet of the first circuit, the first circuit, the removable hose or pipe, and the second circuit, and outward from the outlet of the second circuit. The said panel is mounted on the side wall or on the balcony panel of the furnace and its first and second circuits are connected in parallel to the cooling water source without being connected by the flexible hose or the rigid pipe and then the water is supplied or its first and second circuits are connected in series to the cooling water source by means of the flexible hose or the rigid pipe to the inlet or outlet of one of the two circuits to the inlet or outlet of the other of the two circuits and then supply water to them.EFFECT: invention allows to produce a construction of an universal panel that can be easily adjusted for both normally hot positions inside the furnace and for very hot positions inside the furnace.7 cl, 8 dwg
Procedure for melting steel in arc steel melting furnace of three phase current // 2634105
FIELD: metallurgy.SUBSTANCE: method comprises continuous loading by a conveyor located in a gas flue, heated by the charge gases exiting the furnace, and its melting. Before the continuous feeding of the charge, preliminary one-time loading is carried out through the upper open arch of the furnace with a weight of 40-50% of the total weight of the charge, followed by its melting until the power consumption reaches 220-240 kW⋅h/t, after which the rest of the charge, heated to 300-400°C by gases exiting the furnace, is continuously fed into the formed well by the conveyer of the gas flue.EFFECT: invention allows to reduce the specific power consumption and the melting time, while simultaneously increasing the productivity.3 dwg

Sintering trolley of agglomeration machine // 2633683
FIELD: metallurgy.SUBSTANCE: sintering trolley of the agglomeration machine contains a base on which running and load rollers are mounted, grates and sides, consisting of upper and lower parts, and spikes located on the lower parts of the sides. On each part of the lower sides in the outer direction of the cross section, the axis of the bolt for securing the upper and lower part of the bead is located from the axis of the bolt for securing the lower part of the side to the base of the trolley at a distance of 2-7 of the smallest wall thicknesses of the lower part of the side, and the wall of the side lower part is located between the axes of the said bolts.EFFECT: improving agglomerate quality and increasing its production volume.5 cl, 2 dwg, 1 ex

ethod of group firing of roof burners of heat units // 2633442
FIELD: heating system.SUBSTANCE: method of group firing of roof burners of sintering machine ignition furnace comprises combustion of additional gas in flares located near the burner blocks of pilot burners. Combustion of the additional gas is carried out by means of two counter flares which are formed along the axis of installation of firing burners along in a row with the direction of the flare axis towards each other at a distance of 0.5 of the diametre of the burner tunnel from the roof and from the axis of burner installation in the row. The pilot burners are used, each of which consists of an air supply housing with a retaining washer, electrodes of firing and flame control and a gas channel which is divided into two pipelines at the inlet section, one of which is provided with a nozzle with a perforated washer and a baffle providing passage of 10-15% of gas beyond the retaining washer, and the other one is provided with a straight-jet tip which provides passage of 85-90% of gas.EFFECT: obtaining the longest pilot flame with minimum gas flow.6 dwg

Device and method to control and/or adjusting furnace for annealing or heat treatment in production line of metal material processing // 2633411
FIELD: metallurgy.SUBSTANCE: control device comprises at least two measuring devices (7, 8, 17) for recording at least one mechanical property of strip material (6) in the production line (1). The device also contains a control circuit of automatic control system of the process with a control unit (18) and the feedback circuits (9. 10, 11, 12, 13). Wherein the furnace (2) for heat treatment, at least one rolling stand (3) and a drawing stand (4) by means of feedback of corresponding circuits (9, 10, 11, 12, 13) interact in the control loop of the process control system with at least two said measuring devices (7, 8, 17) and said control unit (18).EFFECT: increasing the quality of the strip material.15 cl, 5 dwg

Lattice nozzle assembly, fluidized-bed reactor with lattice nozzle assembly and lattice nozzle assembly application // 2633323
FIELD: electricity-producing industry.SUBSTANCE: lattice nozzle assembly (18), appropriate for set in reaction chamber of the fluidized-bed reactor, comprises the horizontally passing lower plate (14), the gas compression chamber under the lower plate and the stand gas pipes (20) that have the inner diameter, the upper end (26), and that pass upwards from the gas compression chamber through the lower plate. The lattice nozzle assembly comprises the nozzle head (22) with the gas duct for fluidizing gas supply from one of the stand gas pipes (20) into the reaction chamber and the canular ferrule (24), which is capable of durable fixation by dint of the welding round the stand gas pipe upper end. The nozzle head and the canular ferrule form the twist lock (30), which provides the quick joint and quick release of the nozzle head (22) and canular ferrule (24). Moreover, the canular ferrule (24) is composed of the upper surface, and the nozzle head (22) is composed of the horizontally passing upper portion and passing down core with the inner diameter, which is equal to the stand gas pipe inner diameter. Along with this, the core is capable of insertion in canular ferrule (24) in such a way that the core length is designed with a possibility of packing with the stand gas pipe, when the bottom face of the horizontally passing upper portion is packed with the upper surface of the canular ferrule for the turbulence prevention while supplying the fluidizing gas from the stand gas pipe into the gas duct.EFFECT: nozzle head and canular ferrule quick joint and release.15 cl, 5 dwg

Injection device for blowing or injecting oxygen-enriched gases into metallurgical unit or melting vessel and an electric furnace // 2633130
FIELD: metallurgy.SUBSTANCE: device comprises an injector device for creating a high velocity jet from oxygen gas jet and ignited jet of mixture of combustible gas and air in which the injector device comprises a Laval nozzle located in the nozzle head to create a gas stream of oxygen and in which a mixture of combustible gas and air is created by means of mixing element for mixing flammable gas and air. The Laval nozzle element and the mixing element are located together one after the other, configured to disengage along the medial longitudinal axis of the injector device and forming an annular gap between the nozzle head and the Laval nozzle element, wherein the annular gap includes a flammable gas channel and an air channel of the mixing element. The size of the annular gap is adjustable depending on the axial distance between the element in the form of the Laval nozzle and the mixing element. The Laval nozzle element and the mixing element are arranged concentrically inside and/or on the nozzle head part.EFFECT: invention allows to simplify the design of the injector device which will simplify its manufacture and maintenance.29 cl, 11 dwg
ethod for applying skull on converter lining // 2632738
FIELD: metallurgy.SUBSTANCE: process includes leaving final slag in the converter, blowing of final slag with nitrogen and addition of flux to the converter before blowing and/or during blowing of the final slag. A mixture of serpentinite and magnesite containing components in the following ratio, wt %: MgO≥40; CaO≤5; SiO2≤40; Fe2O3≤8; Al2O3≤1; H2O≤2, and ignition loss is ≤47%. In this case, more than 80% of flux has fraction composition of 5-70 mm, flux consumption is 4-15 kg/t steel, and the MgO content in the converter slag used for application of skull is 8-20%.EFFECT: increasing the skull thickness on the converter lining, increasing the resistance of the working layer of the converter lining without intermediate hot repair.1 tbl

ethod and device for feeding electric power to electric arc furnace // 2632366
FIELD: metallurgy.SUBSTANCE: device is arranged for connecting to supply network for feeding at least one said electrode of electric energy with formation of electric arc for melting the metal mass. The device comprises an adjustment unit installed between said supply network and at least one said electrode, and connected thereto and designed to control at least one supply parameter of at least one said electrode, at least one detecting device designed for detecting at least one said power parameter and positioned between said electrode and said adjustment unit, a positioning unit arranged to move at least one said electrode, reducing or increasing the distance between it and the metal mass to be melted, and the control unit. Control unit connected to said adjustment unit, a power supply network and a positioning unit for controlling the control unit and the positioning unit and for performing control of electric arc over a first control channel by effecting on the adjustment unit, and for controlling the electric arc on a second control channel by effecting on the positioning unit.EFFECT: invention makes it possible to control melting power and characteristics of arc voltage and arc current efficiently to provide electric arc stability in the metal melting process, and to suppress disturbances induced in the supply network.9 cl, 2 dwg

Chamber furnace with roll-out hearth // 2632049
FIELD: metallurgy.SUBSTANCE: chamber furnace comprises an end wall which is the roll-out hearth made with side framing and a knife with bevelled edge horizontally installed, and a thermal gate installed under side framing of the hearth. The thermal gate is made in form of bearing surfaces, between which there is a base with sealing material placed layer-by-layer therein, and configured to enter between the layers of said knife. The roll-out hearth comprises a load-bearing transverse beam which is fastened to the side frame of the hearth and to which said knife is welded. The end wall of the furnace comprises a discharge arch with ceramic fibre blocks lined thereunder. The sealing material is fixed on the bearing surfaces by a stainless circle to prevent it from falling out during return movement of the hearth.EFFECT: improved reliability of the furnace hearth end sealing.4 cl, 2 dwg

Industrial tunnel oven // 2631433
FIELD: machine engineering.SUBSTANCE: oven contains an outer wall and an inner wall for limiting the tunnel through which the parts pass. The holes in the air tunnel are provided for discharge inside the tunnel. The outer wall has the shape of a cylinder. By means of mentioned wall, intermediate spaces are formed for circulating the hot air in the direction of mentioned holes and/or towards the hot air extraction channel.EFFECT: simplified construction.18 cl, 10 dwg

easuring device for "hot reconciliations" of rotating furnace axis position // 2630995
FIELD: measuring equipment.SUBSTANCE: measuring device is equipped with a leveling rod and a guide installed on the leveling rod and two holders fixed thereon. At the same time, two mobile carriages connected to each other by an adjusting screw are mounted on the guide, a frame is attached to the side wall of one carriage, in which a vertical design level device is installed, as well as two mutually perpendicular level indicators. To the side wall of the second carriage there are attached a pointer intended for setting the carriage in the desired position with respect to the scale of the leveling rod, and a frame with a dial indicator for determining the distance from the band forming the furnace to the scale of the leveling rod. Herewith the measuring rod of the hour type indicator is supported by the support area of the frame of the first carriage.EFFECT: increasing the accuracy of alignment of the furnace axis.5 dwg

Roller bearing of sintering trolley of agglomeration machine // 2630993
FIELD: metallurgy.SUBSTANCE: sintering trolley roller bearing of the sintering machine contains load and running rollers, the latter comprising two annular separators with tapered rollers contacting the bearing surfaces of the rings, pressed on the axis and an intermediate ring forming a labyrinth seal with the end face of the running roller. The roller bearing is provided with a sleeve installed in the running roller, on which the annular bearing surfaces are made contacting with said conical rollers.EFFECT: simplified structure of sintering trolley roller bearing, increased its operational reliability, reduced lubricant consumption.3 cl, 1 tbl, 2 dwg, 1 ex

Loading and distribution device of uniflow and counterflow regenerative furnace with round shafts for sintering lumpy carbonate material // 2630992
FIELD: metallurgy.SUBSTANCE: invention is related to loading and distribution shaft devices, mainly uniflowflow and counterflow regenerative furnaces with round shafts for sintering carbonate materials and can be used in metallurgical, construction, chemical, food and other industries. The loading and distribution device of the uniflow and counterflow regenerative furnace with two round shafts for sintering lumpy carbonate material consists of a common hopper standing on furnace bearing frame and connecting loading openings of said shafts by means of inclined chutes. The intermediate hoppers are located under the loading holes of the shafts and equipped with rotation drives relative to the axis of the shafts and there are fixed tables located under the intermediate hoppers with a gap that exceeds the maximum size of the processed pieces of material. The brakets with baffles are located under the edge of each fixed table and rigidly fastened to the outer walls of the intermediate hoppers and the fixed tables are provided with a gap.EFFECT: improved quality of sintered lime and furnace efficiency.3 cl, 2 dwg

Thermal screening system // 2630728
FIELD: heating system.SUBSTANCE: system comprises at least one shielding element having a sheath made of sheet/sheets of a refractory metal and a zirconium oxide (ZrO2), Present in the form of a structure of particles and/or fibers. A high-temperature furnace containing said system is disclosed.EFFECT: increase energy efficiency, reduce energy costs and increase the service life.15 cl, 5 dwg
Electric mode automatic control system of melting facility with two electric heating sources using smart control sensor of melting metal aggregate state // 2630160
FIELD: metallurgy.SUBSTANCE: electric mode automatic control system of a melting facility provided with arc heating source and resistance heaters comprise an arc source control line including a power source configured to supply voltage to crown and hearth electrodes through a current controller and current conductors. The system also includes a resistance heater control line including a thyristor voltage regulator connected to the resistance heaters, a video image device for fixing surface of the melting metal with a sensor for controlling its aggregate state. The system includes a microprocessor unit configured to shut off the arc source control line at the time of complete melting of the charge based on signal from said control sensor and connecting the resistance heater control line.EFFECT: improved regulation quality when material is heated in furnace.1 dwg
ethod to produce electrodes of alloys based on titanium aluminide // 2630157
FIELD: metallurgy.SUBSTANCE: method comprises production of cast intermetallic semifinished product by centrifugal SHS casting method using a reaction mixture with the following component ratio, wt %: target composition 57.5-62.0, energy additive 35.0-40.0, CaF2 flux 2.5-5.0, and subsequent vacuum induction remelting of the resulting semifinished product in water-cooled copper crucible, introducing powder master alloy into the melt 1-2 minutes before it is poured into the crystalliser and consisting of pressed aluminium-nanopowder mixture with specific surface area of 5÷30 m2/g in amount providing 0.5-7 vol. % of nanopowder in the melt. A mixture of TiO2, Ti, Al, Ca, Nb2O5 and Cr2O3 are used as the target, and CaO2 are used as energy additive mixture.EFFECT: invention allows to develop integral technology for producing electrodes of titanium aluminide-based alloys by centrifugal atomisation of electrode material and producing granules for additive 3d sintering technologies for complex products of heat-resistant metal materials.3 cl, 10 tbl, 3 ex

ethod and device for introducing a fine-dispersed material in a fluidized layer of a restorable unit with a fluidized layer // 2630136
FIELD: technological processes.SUBSTANCE: fluidized layer temperature (24) is greater than 300°C and less than 900°C. The introduction of the fine material (4) is carried out by the burner (2) directly into the fluidized layer (24) and/or into the free space (25) above the fluidized layer (24). At the same time, the surface of the fine particles (4) is fused and agglomerates are formed which are kept in suspension by the upwardly flowing reducing gas. The particles contained in the agglomerates containing iron oxide are reduced and removed from the reducing unit (1).EFFECT: invention allows the use of a finely dispersed material comprising a large number of iron-containing particles, without being pretreated directly in the cast iron production process and/or direct reduction process without adversely affecting the cast iron production process.15 cl, 3 dwg

ethod of operation of arc electric furnace and melting unit equipped with the operated this method of the arc electric furnace // 2630133
FIELD: metallurgy.SUBSTANCE: invention can be used to control the current operating state of an electric arc furnace during its operation in the melting unit, wherein for each of the plurality of the melting furnace components affecting the operating conditions of an electric arc furnace, is recorded at least one measurement value for characterizing its operative state and the measured value is compared with the respectively current limit value admissible for this measured value and on the basis of the comparison result, the maximum input power supplied to the electric arc furnace during the period (Δti) Time if all the current allowable limits is determined. The maximum input power (P) and/or the length of the period (Δti) Time is determined by predicting the time variation of at least one of the measured values.EFFECT: invention makes it possible to increase the productivity of an electric arc furnace.10 cl, 2 dwg

ethod of operation of a vacuum fuel unit and the vacuum fuel unit operated by this method // 2630111
FIELD: metallurgy.SUBSTANCE: by means of at least one body noise sensor indirectly or directly acoustically coupled to the ladle in which the steel melt is placed, the acoustic signals generated in the bucket are received and used in a control and analytical processing device having an algorithm for determining the height or thickness and/or differential ratio to the height time or, respectively, the thickness of the foamed slag located in the ladle above the steel melt bath. In the control and analytical processing device, an algorithm has also been implemented that uses acoustic signals to detect the presence of leaks in a vacuum melting unit.EFFECT: invention makes it possible to monitor the operating state of the vacuum melting unit by using acoustic signals when blowing process gases into the ladle, when the upper level of the foamed slag changes and for detecting looseness in the vacuum melting unit.19 cl, 1 dwg
ethod for melting high-chromium steels and alloys in open induction furnaces // 2630101
FIELD: metallurgy.SUBSTANCE: method includes pouring the charge, melting thereof, introducing slag-forming materials into the furnace, preliminary deoxidation, alloying the melt, absorption of alloying elements, final deoxidation, slag loading and casting into the ladle. At the end of alloying after absorption of alloying elements with melt temperature not higher than 1600°C, chromium and alloying elements that increase the solubility of nitrogen in iron are injected simultaneously, and after absorption, the final deoxidation, slag loading and casting into the ladle are carried out for 5-7 minutes. After the introduction of each portion, the slag-forming mixture is additionally fed in the melt in an amount of 1-3% of the portion weight.EFFECT: invention allows to reduce nitrogen content in high-chromium steels and alloys melted in open induction furnaces.4 cl, 1 tbl

Circuit cooling device and pallet reinforcement for it // 2628592
FIELD: heating system.SUBSTANCE: support beam comprises a front side panel, a rear side panel, a front vertical panel and a rear vertical panel in which the front side panel and the rear side panel are respectively inclined in two directions and the upper edge of the front side panel and the upper edge of the rear side panel are rigidly connected. The front side panel has a front side ventilation grille. The front vertical panel and the rear vertical panel are located under the front side panel and the rear side panel and are respectively fixedly connected to the front side panel and the rear side panel to form a single structure. Between the front vertical panel and the rear vertical panel, a sealed space is formed that is not communicated with the cooling air passage, and the lower edge of the front side panel and the lower edge of the rear side panel extend beyond the front side panel and the rear side panel. The upper edges of both are located in front of the vertical median plane of the sealed space. An annular cooling device with the aforementioned pallet support beam is disclosed.EFFECT: simplification of construction and relatively low self-weight with the provision of increased space for the placement of mineral material and increasing the production efficiency of the ring cooling device.10 cl, 10 dwg

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
 
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