596results about "Preheating charges" patented technology

The invention relates to the technical field of lime shaft kilns, in particular to a full-automatic Kawasaki rotating lime shaft kiln device, and aims to solve the problems that during combustion of an existing lime shaft kiln, due to the fact that flame heat is concentrated on a local part, a disordered and uniform temperature field cannot be formed, and the calcination temperature of limestone is not uniform; limestone processing is achieved through the combustion mechanism on the supporting seat, the soaking assembly in the thermal insulation shell guides materials and cooperates with the combustion assembly for preheating, a flame jet device of the combustion assembly jets flames, the flames act with heating gas blown out by the high-pressure air pump to form a uniform temperature field, and the material guiding plate guides the materials to enter the rotating processing part. And the processing component disperses the materials through the rotating and material uniformizing assembly, so that the limestone is uniformly heated, and the uniform effect during limestone calcination is improved.

The invention discloses a coal gangue distributed homogeneous high-temperature activation calcination method and system, and relates to the technical field of resources and environments, the system comprises a coal gangue powder preparation and feeding system, a coal gangue powder distributed homogeneous high-temperature activation calcination system, a high-temperature powder cooling system, a finished product collection system and a flue gas purification system; the coal gangue powder distributed homogeneous high-temperature activation calcining system comprises a primary cyclone preheating system and a distributed homogeneous high-temperature activation furnace; the air inlet end of the primary cyclone preheating system is communicated with the coal gangue powder preparing and feeding system, the primary cyclone preheating system is communicated with the homogeneous high-temperature activation furnace, materials in the distributed homogeneous high-temperature activation furnace are separated by the gas-solid cyclone separator and then are divided into two parts by the distributor, one part enters the high-temperature powder cooling system, and the other part enters the high-temperature powder cooling system; and the other part returns to the distributed homogeneous high-temperature activation furnace for circulation. According to the method, large-scale treatment of high-temperature activation and calcination of the coal gangue is realized, and the uniformity and controllability of product quality are remarkably improved.

The invention relates to the technical field of carbon black production, in particular to high-volume resistance carbon black production equipment. The furnace comprises a furnace body, the furnace body is divided into three areas from top to bottom, and the furnace body comprises a preheating area, a reaction area and a homogenizing area from top to bottom; a coil pipe is arranged in the preheating area, the end part of the coil pipe is fixedly connected with a furnace wall lining, the furnace wall lining is positioned in the reaction area, the bottom of the furnace wall lining is fixedly connected with a furnace chamber, and the furnace chamber is positioned in the homogenizing area; a plurality of rotational flow assemblies are arranged in the furnace wall lining, a uniform distribution plate is arranged in the furnace cavity, a gap is reserved between the furnace cavity and the homogenizing area, and a water cooling device is arranged in the gap between the furnace cavity and the homogenizing area. Through a three-area modular structure, accurate regulation and control of the preheating temperature of raw materials are realized, a uniform and stable material basis is provided for a reaction area, and the problem of insufficient preheating of a traditional single cavity structure is solved.

The utility model provides a charging waste heat platform for secondary aluminum production, and relates to the field of secondary aluminum production. The charging waste heat platform for secondary aluminum production comprises a platform body and supporting legs installed at the bottom of the platform body, the charging waste heat platform body comprises a fixed platform body, a fixed cover and a fixed shell, a feeding device used for smashing aluminum raw materials is installed on the fixed shell, and a conveying mechanism is installed in the fixed cover and the fixed shell. Feeding holes are formed in an outer cylinder and a fixed shell of the conveying mechanism; according to the feeding waste heat platform for secondary aluminum production, flue gas is wrapped by the fixing cover and can flow in the specific direction, the heat loss amount in the preheating process is reduced, energy is saved, aluminum raw materials are crushed through the two crushing cutters, the contact area of the aluminum raw materials and air is increased, the subsequent preheating effect is improved, and the service life of the aluminum raw materials is prolonged. And the conveying mechanism can intermittently supply materials and is matched with the inner cylinder and the outer cylinder to rotate, so that the aluminum raw materials continuously roll, the retention time and the heated contact area are increased, and the preheating effect is improved.

The utility model relates to the technical field of preheaters, and provides an efficient preheater for a rotary kiln, which is characterized in that a distributor is arranged in a shell and is used for dividing the interior of the shell into an upper preheating bin and a lower preheating bin; the discharging chute tube is arranged in the shell and located on the periphery of the distributing device, the upper end of the discharging chute tube is communicated with the upper preheating bin, and the lower end of the discharging chute tube is communicated with the lower preheating bin; one end of the lower preheating pipeline is used for being communicated with a waste gas discharge pipe, and the other end of the lower preheating pipeline is used for extending into the lower preheating bin; one end of the upper preheating pipeline is used for being communicated with a waste gas discharging pipe, and the other end of the upper preheating pipeline is communicated with the upper preheating bin. One end of the lower waste gas recovery pipe is communicated with the lower preheating bin, and the other end of the lower waste gas recovery pipe is communicated with waste gas treatment equipment; one end of the upper waste gas recovery pipe is communicated with the upper preheating bin, and the other end of the upper waste gas recovery pipe is communicated with the lower waste gas recovery pipe. According to the technical scheme, the problem that the preheating effect of a preheater on materials needs to be improved in the prior art is solved.

The application discloses a rotary kiln tail gas treatment device, which comprises a rotary kiln, a tail gas treatment mechanism and a preheating mechanism, the rotary kiln comprises a preheating section and a heating section, the preheating mechanism is installed on the preheating section, the tail gas treatment mechanism comprises a spray tower and a connecting pipe, the connecting pipe is arranged in a V shape, the air inlet of the connecting pipe is communicated with the smoke outlet of the rotary kiln, the air outlet of the connecting pipe is communicated with the spray tower, a dust collecting box is connected to the bottom of the connecting pipe, a plurality of baffles are arranged in the connecting pipe at intervals, and the plurality of baffles are arranged in an inclined manner towards the dust collecting box. The rotary kiln tail gas treatment device can recycle the spraying water, and can fully utilize the heat in the tail gas to avoid waste.

The invention discloses an environment-friendly metal combined smelting furnace, relates to the field of metal smelting equipment, and aims to solve the problems of low efficiency, heat energy waste, waste gas pollution, inconvenience in operation and the like of a traditional smelting furnace. The environment-friendly metal combined smelting furnace comprises a smelting furnace support, a rotatable high-temperature smelting furnace is arranged on the support, and a liftable metal preheating furnace is arranged above the support; a smelting crucible and a combustor are arranged in the high-temperature smelting furnace, and a multi-layer heat insulation structure is arranged on the outer side; a preheating box is arranged in the metal preheating furnace, forms an exhaust cavity with the furnace wall, and is butted with the high-temperature smelting furnace through a waste gas guide pipe to realize secondary combustion of waste gas; according to the equipment, waste heat recovery and waste gas harmless treatment are achieved, the energy utilization rate and the environmental protection property are improved, operation is convenient and fast, and the equipment is suitable for smelting of various kinds of metal.

The invention belongs to the technical field of cement production line transformation, and discloses a method for transforming a cement clinker production line into a coal gangue suspension calcination production line, the cement clinker production line comprises five stages of double-series preheaters and a decomposing furnace, the five stages of double-series preheaters are divided into A-row preheaters and B-row preheaters, a preheater in the column A is transformed into a preheating device of the coal gangue powder suspension calcination production line, a preheater in the column B is transformed into a gas-solid separation cyclone and a cooling device of the coal gangue powder suspension calcination production line, and a pipeline furnace is arranged between an air outlet of a decomposing furnace and an air inlet of the gas-solid separation cyclone. A decomposing furnace and a pipeline furnace are jointly transformed into a coal gangue suspension calcining furnace. According to the method, an obsolete cement clinker production line is transformed into a coal gangue suspension calcining production line with the working procedures of coal gangue grinding, conveying, metering, preheating, calcining, cooling and the like.

The utility model discloses a slurry preheating device for ferrite material production, which relates to the technical field of ferrite material production and comprises a base, a preheating box is fixedly mounted at the top of the base, a feed port is fixedly connected to the right side of the top of the preheating box, and a discharge port is fixedly connected to the bottom end of the left side of the preheating box. And plugging plates are movably inserted into the feeding opening and the discharging opening correspondingly, a screening unit is arranged in the preheating box and comprises sliding grooves formed in the top ends of the inner walls of the front side and the rear side of the preheating box, and filter sieves are movably inserted into the sliding grooves. The bidirectional motor is arranged, the top output end of the bidirectional motor is used for driving the driving rod to rotate, the driving rod drives the rotating plate to promote the brake rod to rotate along with the driving rod, the brake rod drives the brake sleeve to promote the reciprocating rod to reciprocate left and right, and the reciprocating rod drives the rolling wheel to roll at the top of the filter sieve to roll and crush agglomerates. The slurry production quality is promoted.

The present invention relates to the technical field of alternative fuel in the cement industry. Disclosed is a high-proportion alternative fuel pre-treatment and cement kiln incineration system, comprising a stacking shed, a storage system, a rotary kiln, a pulverized coal burner, a cooler, a tertiary air duct and a preheated raw-material preheater; and further comprising a crushing system, a homogenization system, metering systems, conveying systems, gravity-type feeding systems, a multifunctional decomposition furnace, a special combustor for alternative fuel, and a pneumatic conveying system. In the present invention, the particle size of crushed alternative fuel is controlled on the basis of a flue gas suspension speed, such that the alternative fuel combusts in a suspended manner in the multifunctional decomposition furnace; the alternative fuel is metered by means of the three metering systems, and the alternative fuel in one path is fed into the special combustor; the special combustor and the pulverized coal combustor are arranged one above the other in the rotary kiln, and pulverized coal combustion is used to drive the combustion of the alternative fuel; and the gravity-type feeding systems and their respective two airlock discharge valves, which are alternately opened, are used to feed in the alternative fuel, thereby reducing air leakage during a feeding process.

The invention discloses a process and system for preparing an auxiliary cementing material by calcining granular coal gangue coupled with a cement clinker sintering system, and the process comprises the following steps: treating large undisturbed coal gangue to obtain granular coal gangue, and quantitatively analyzing minerals in the granular coal gangue; feeding the granular coal gangue raw material into an activating calcining kiln for activating and calcining; then feeding into a grate cooler for cooling to obtain calcined activated coal gangue; wherein an activation calcination heat source comes from high-temperature section hot air of a grate cooler and hot air at an outlet of a C4 preheater, the proportion of the high-temperature section hot air, the hot air at the outlet of the C4 preheater and combustion-supporting air is controlled, and temperature and oxygen concentration adjustment at the activation calcination stage is achieved. According to the invention, the system for preparing the auxiliary cementing material by calcining the coal gangue is coupled with the original cement clinker sintering system, so that the on-line doping of the auxiliary cementing material in the cement clinker is realized, and meanwhile, the carbon emission is reduced.

The aluminum product solid solution oven with the preheating and recycling functions comprises a solid solution oven body, a fixing plate is fixedly installed on one side of the solid solution oven body, sliding grooves are formed in the two ends of the top of the fixing plate, round rods are fixedly installed in the sliding grooves, the surfaces of the round rods are movably connected with sliding blocks in a sleeved mode, and the sliding blocks are connected with the top of the fixing plate in a sleeved mode. Buffer springs are fixedly installed between the sliding blocks and the sliding grooves, the inner surfaces of the buffer springs are movably connected with the outer surfaces of the round rods, buffer rods are hinged to the bottoms of the sliding blocks, a bottom plate is hinged to the bottoms of the buffer rods, and a round shaft is movably installed at the top of the fixing plate; the bottom of the circular shaft penetrates through the fixing plate and is fixedly connected with the top of the bottom plate. According to the aluminum product solid solution oven with the preheating and recycling functions, in the daily use process, when a heat pipe heat exchanger is impacted, the heat pipe heat exchanger can drive a carrying plate to slide, and then the carrying plate can extrude and compress supporting springs.

The invention relates to the technical field of chip packaging, and provides a TEC chip packaging and crimping method and an online vacuum pressure sintering furnace. The TEC chip packaging and crimping method comprises the steps that a TEC workpiece and a jig enter a plasma cleaning area, and a plasma cleaning step is executed; the TEC workpiece and the jig enter a formic acid cleaning area, and the formic acid cleaning step is executed; the TEC workpiece and the jig enter a preheating area, and the preheating step is executed; the TEC workpiece and the jig enter a crimping area, and the crimping step is executed; the TEC workpiece and the jig enter a first cooling area, and a first cooling step is executed; and the TEC workpiece and the jig enter a second cooling area, and a second cooling step is executed. And the packaging quality of the TEC chip is improved.

The invention provides a furnace body heat energy recovery device which is arranged on a furnace body with a smelting cavity, the smelting cavity is formed by dividing a molten pool and a furnace shell covering the molten pool, and the furnace body heat energy recovery device comprises a heat absorption mechanism located in the smelting cavity; the heat release mechanism is arranged on the outer side of the furnace body, the heat release mechanism communicates with the heat absorption mechanism, and the heat release mechanism is provided with a heat release structure for releasing heat energy; and the feeding mechanism is provided with a feeding structure and a preheating cavity for containing smelting materials, the feeding structure communicates with the preheating cavity and the smelting cavity, the heat release structure is arranged in the preheating cavity, and the problem that the waste heat recovery efficiency of the steel smelting furnace is low is solved.

An adjustable high-temperature steam directional permeation device for a sintering round roller stock bin comprises a directional permeation spray gun system which comprises an adjustable spray gun; one end of the adjustable spray gun is located in the round roller stock bin, and the acting force of materials in the round roller stock bin on the adjustable spray gun at least comprises a component which is in the axial direction of the adjustable spray gun and points to the inner side of the round roller stock bin; the other end of the adjustable spray gun is located outside the round roller stock bin and used for being connected with a steam source. According to the device, the adjustable spray gun is inserted into the round roller bin to conduct steam injection on materials, steam directly reaches a core area of a material layer, steam heat is almost completely absorbed by the materials, heat energy loss is low, and the temperature of the materials is greatly increased; the material is heated by steam from the inner layer of the material, and the thickness of an over-wet layer is obviously reduced because the steam is uniformly dispersed. The spray gun device solves the problem that in the prior art, a spray gun device in a round roller stock bin is poor in preheating effect.

The utility model provides a dry process cement clinker firing device which comprises a preheating mechanism, a decomposing furnace, a material spraying assembly, a rotary kiln and a cooling machine, the preheating mechanism is used for preheating raw materials, the decomposing furnace is connected with the preheating mechanism, the decomposing furnace is used for receiving and decomposing the preheated raw materials, the material spraying assembly is connected with the decomposing furnace, and the rotary kiln is connected with the cooling machine. The material spraying assembly is used for evenly spraying preheated raw materials into the rotary kiln, the rotary kiln is used for calcining the raw materials to form clinker, the rotary kiln sequentially comprises a shell, at least two heat insulation layers and a heat-resistant lining from outside to inside, and the cooling machine is used for cooling the clinker. Due to the fact that the material spraying assembly evenly sprays the preheated raw materials into the rotary kiln, the raw materials can be heated more sufficiently and evenly in the rotary kiln, the calcining process is more thorough, and the clinker quality is further guaranteed. In addition, due to the fact that the rotary kiln comprises at least two heat insulation layers, the heat insulation effect of the rotary kiln is better, and the calcination process is more thorough.

The application belongs to the technical field of intermediate frequency heating furnace, in particular to an intermediate frequency heating furnace for preheating electrolytic aluminum anode, which comprises a heating furnace body for heating anode rods, an electromagnetic coil arranged inside the heating furnace body, an air inlet pipe fixedly connected to one end of the electromagnetic coil, an air outlet pipe fixedly connected to the other end of the electromagnetic coil, a fan arranged on one side of the heating furnace body, an air outlet end of the fan in communication with the air inlet pipe, a second water tank arranged on one side of the heating furnace body, a heat treatment tank fixedly installed on the side wall of the second water tank, a thermoelectric converter arranged inside the heat treatment tank, the air outlet pipe extending through the second water tank to the inside of the heat treatment tank at an end away from the heating furnace body, the air outlet opening facing the heat absorbing end of the thermoelectric converter, and an electromagnetic generator arranged at the top end of the heat treatment tank, with a transmission rod fixedly connected to the rotor of the electromagnetic generator, so that the waste heat source can be effectively converted into electric energy, the energy utilization efficiency is improved, and the production cost is reduced.

The invention relates to a combustion type multi-target material flow heating furnace and process for petroleum processing, the heating furnace comprises a main heating furnace and an auxiliary heating furnace integrated with the main heating furnace, the main heating furnace is provided with a convection chamber and a radiation chamber which are arranged up and down, and a first material flow enters the radiation chamber to be heated to a first final temperature after being preheated by flue gas of the convection chamber; at least one second stream is heated in the radiation chamber and then enters at least one auxiliary heating furnace for heat compensation to a second final temperature, and flue gas of the auxiliary heating furnace is introduced into the convection chamber for waste heat recovery. The convection chamber is provided with a saturated steam heat exchange pipeline and an air preheating heat exchange chamber, and the upstream of the main heating furnace is integrated with a gas turbine or equipment meeting specific combustion conditions to achieve waste heat gradient utilization. Through integration of the main furnace and the auxiliary furnace and multi-target material flow graded heating, the heating efficiency is improved, the energy consumption is reduced, and the device is particularly suitable for synergistic heating of primary tower bottom oil and atmospheric tower bottom oil in crude oil distillation.

The invention provides an aluminum material purification refining furnace for non-ferrous metal remanufacturing, and belongs to the technical field of aluminum melting equipment, the aluminum material purification refining furnace comprises a furnace shell and a heat insulation bottom plate, an aluminum melting unit and a heat insulation layer are installed on the heat insulation bottom plate, and the heat insulation layer is arranged on the outer side of the aluminum melting unit in a sleeving mode. Wherein a heat insulation gap is formed between the aluminum melting unit and the heat insulation layer, an annular bracket is installed in the heat insulation gap, and a traction unit is installed on the furnace shell. The heat insulation gap is formed between the aluminum melting unit and the heat insulation layer, aluminum raw materials are put into the heat insulation gap, waste heat dissipated outwards by the aluminum melting unit is used for drying the aluminum raw materials, the aluminum raw materials are preheated, energy consumption is reduced, meanwhile, the aluminum raw materials can be gradually lifted to the top of the heat insulation gap through the lifting annular bracket, and the heat insulation effect is improved. And when the aluminum raw materials do not need to be added, the aluminum raw materials are always in a dry heat preservation state in the heat insulation gaps, and the situation that the surfaces of the aluminum raw materials adsorb moisture again due to the fact that the transferring time is too long is avoided.

The invention discloses a roasting system for leaching and lithium extraction of salt lake deposited clay type lithium ores, and belongs to the technical field of salt lake resource development and lithium extraction, the roasting system comprises a rack, the rack is provided with a preheating mechanism, a rotary driving mechanism and a roasting box, the preheating mechanism is used for preheating the leached salt lake deposited clay type lithium ores, and the rotary driving mechanism is used for driving the roasting box to rotate; the preheating mechanism is composed of a charging barrel, a lower conical barrel, a communicating pipe and a preheating box, a first rotating guide ring is arranged at the lower end of the charging barrel, and a first guide ring cavity is formed in an upper cavity opening of the lower conical barrel; the lower conical barrel adopts a rotating mode, and a matching structure of a first rotating guide ring at the lower end of the matched charging barrel and a first guide ring cavity at an upper cavity opening of the lower conical barrel is adopted, so that continuous circumferential shearing force and radial pushing force can be generated on the lithium ore which is high in viscosity and easy to cake after leaching, and the lithium ore is turned over along the inner wall of the conical barrel through rotation; local accumulation dead angles are avoided, and the problem that materials are bonded and blocked in a traditional fixing structure is solved.

The utility model relates to the technical field of calcining furnaces, in particular to a microwave heating high-temperature circulating flash calcining furnace, which comprises a cylindrical furnace body, a strong wave-transparent layer arranged on the inner wall of the cylindrical furnace body, a fire-resistant furnace lining arranged on the inner wall of the strong wave-transparent layer, a microwave generator arranged on the periphery of the cylindrical furnace body, and a preheater connected with the upper end of the cylindrical furnace body, a dust removal assembly is arranged above the preheater, and a discharging machine is arranged at the lower end of the cylindrical furnace body and connected with a cooling machine. According to the utility model, the microwave generator is used for calcining magnesite, dolomite, limestone, kaolin, clay, illite and the like, can be used for calcining in a reduction furnace or a vacuum reduction furnace, and is also suitable for high-temperature and ultrahigh-temperature flash sintering high-grade refractory materials; the device has the advantages of low investment cost, small occupied area, high resource utilization rate and the like.

The invention discloses a lepidolite steam fluidization roasting method and system, and belongs to the technical field of treatment methods of lithium-containing minerals. The roasting method provided by the invention comprises the following steps: S1, mixing lepidolite mineral powder with a sulfate auxiliary agent to prepare a roasted raw material, adding a fluorine fixing auxiliary agent, and mixing to prepare a mixture; s2, the mixture and fluidizing gas are subjected to preheating treatment; s3, the preheated mixture and the preheated fluidizing gas are fed into a fluidized bed roasting furnace to be subjected to a fluidized roasting reaction, and roasting clinker, a fluorine fixing auxiliary and thallium-containing tail gas are obtained through separation; and S4, carrying out cyclone preheating and wet defluorination on the thallium-containing tail gas, and reacting the thallium-containing tail gas with metal sulfide to prepare thallium sulfide. The method is environment-friendly and efficient, the lithium smelting slag amount and loss of harmful elements can be remarkably reduced, the utilization rate of lithium resources is increased, and the problem that hydrofluoric acid corrodes equipment in the acid leaching process is solved.

A powdered limestone suspension calcination system with waste gas treatment function belongs to the fields of limestone resource processing technology and industrial waste gas treatment. It includes a feeding unit, a calcination unit, a cooling unit, a product bin, and a tail gas treatment unit. The discharge end of the feeding unit is connected to the feed end of the calcination unit, the discharge end of the calcination unit is connected to the feed end of the cooling unit, and the discharge end of the cooling unit is connected to the product bin. The air inlet of the feeding unit is connected to the air outlet of the calcination unit, the air outlet of the feeding unit is connected to the air inlet of the tail gas treatment unit, and the air outlet of the cooling unit is connected to the air inlet of the tail gas treatment unit. The system provided by this invention can realize the calcination of limestone of all particle sizes, introduces a heat recovery system and a waste gas treatment system, reducing energy consumption and production costs; after dust removal, cooling, and treatment, the waste gas has reduced environmental impact and meets the requirements of sustainable development.

The utility model discloses a novel efficient heat exchange low-pressure-loss preheater which achieves the technical effects of reducing system resistance, improving separation efficiency and reducing C1 outlet temperature by increasing the height of a volute in a gradient mode, prolonging the length of an inner barrel in a proportion mode, optimizing the structure of an air inlet pipe and improving a material scattering device. The method is particularly suitable for energy-saving transformation of a 5000t / d cement clinker production line, and has the characteristics of low investment, quick effect, lasting effect and the like.

The utility model discloses an efficient and energy-saving rotary furnace, which belongs to the technical field of rotary furnaces and comprises a base, the top of the base is fixedly connected with a supporting inclined pedestal, the top surface of the supporting inclined pedestal is fixedly connected with a rotating frame, and the inner side of the rotating frame is rotatably connected with a rotary furnace barrel. The top end of the rotary furnace barrel is rotationally connected with a feeding fixing plate, and the bottom end of the feeding fixing plate is connected with the top face of the supporting inclined pedestal. According to the rotary furnace, when materials are processed in the rotary furnace barrel, the first motor is used for driving the rotating shaft, the scraping plate, the rotating rod and the chopping knives to rotate in the direction opposite to the rotary furnace barrel, the scraping plate is used for scraping the materials attached to the inner wall of the rotary furnace barrel, and the second motor is used for driving the rotating rod and the chopping knives to rotate; and caked materials are crushed and dispersed by using a chopping knife, so that the speed and the quality of treating the materials are ensured.

The utility model discloses an aluminum material smelting device capable of reducing loss, and relates to the technical field of aluminum material smelting. The device comprises a smelting barrel, the top of the smelting barrel is fixedly communicated with a heat exchange pipe used for placing raw materials, a through baffle is inserted into one side of the heat exchange pipe, through holes used for air to penetrate through are formed in the surface of the baffle, one side of the smelting barrel is fixedly connected with a filter box, and a plurality of activated carbon nets used for filtering air are inserted into one side of the filter box. The top of the filter box is fixedly communicated with a connecting pipe, one side of the heat exchange pipe is fixedly communicated with an air outlet pipe, the air outlet pipe is fixedly communicated with the connecting pipe, a fan is arranged on one side of the filter box, and the air exhaust end of the fan is communicated with the filter box. According to the smelting furnace, part of harmful gas generated during smelting can be filtered out, the on-site environment quality can be improved, raw materials can be preheated, heat loss is reduced, dust generated during smelting can be filtered out, the service life of the activated carbon net can be prolonged, and the labor amount of workers can be reduced.

The invention discloses a system for preheating and melting a solid material and a steel preheating and melting method, which adopt the design of an inclined blanking and preheating channel associated with the characteristics of scrap steel, can effectively consider the rapidity, stability and accuracy of scrap steel blanking, can also effectively increase the heat exchange area between the scrap steel and high-temperature flue gas, and improves the heat exchange efficiency of the scrap steel and the high-temperature flue gas. The heat exchange efficiency is effectively improved, the production efficiency is greatly improved, and the energy consumption is reduced. And the real-time preheating temperature of the scrap steel in the heat exchange process is detected, regulated and controlled, so that the preheating temperature of the scrap steel and the utilization efficiency of flue gas waste heat are effectively improved. In addition, during melting of the waste steel, a gas type heating burner and an electromagnetic heater are combined and matched, rapid heating and rapid melting of the solid waste steel are jointly achieved, the overall production efficiency is further improved, and energy consumption is further reduced. The system is simple in structure, easy to operate and control, simple and convenient in preheating and founding process, high in production efficiency and low in energy consumption, and has excellent prospects of large-scale popularization and application.

The invention aims to provide a sintering ring cold waste gas zero emission treatment system and method, and relates to the technical field of waste gas emission in the steel industry. The system comprises a circular cooler, a waste heat boiler and a blast furnace ore tank, a waste gas outlet of the cooling section generating high-temperature waste gas is connected with a waste gas inlet of the waste heat boiler, and a waste gas outlet of the waste heat boiler is connected with air boxes below trolleys of the cooling sections generating the high-temperature waste gas, so that the high-temperature waste gas enters the waste heat boiler to be subjected to waste heat recovery and then enters the cooling sections again to be recycled. The cooling section for generating the medium and low temperature waste gas is connected with the blast furnace ore tank, and the medium and low temperature waste gas is introduced into the blast furnace ore tank to supply heat to the blast furnace ore tank. According to the sintering ring cooler waste gas zero emission system, cross-process resource collaboration is achieved, meanwhile, waste gas is completely consumed, the purpose of sintering ring cooler waste gas zero emission is achieved, other large equipment is not added, and the sintering ring cooler waste gas zero emission system has the advantages of being simple in structure and low in maintenance cost.

The utility model belongs to the field of positioning devices, and particularly relates to an internal positioning device of a pre-forging preheating furnace, which comprises a preheating furnace, two guide rails are fixedly connected in the preheating furnace, guide seats are slidably connected to the two guide rails, positioning seats are fixedly connected to the tops of the guide seats, and the positioning seats are slidably connected in the preheating furnace. A positioning pin is slidably connected to the bottom of the positioning seat and penetrates through the positioning seat, a pull rod is slidably connected to the interior of the positioning seat and penetrates through the positioning seat, and a slope block is fixedly connected to one end of the pull rod. According to the utility model, the locking seat is arranged in the preheating furnace and below the positioning seat, and then the positioning pin which stretches out and draws back by the spring is arranged in the positioning seat, and the positioning pin can be inserted into the locking seat under the action of the spring, so that the positioning seat has a locking function after entering the position in the preheating furnace, and the situation that the position of a workpiece is too random is prevented; and the heating uniformity is ensured.

The utility model discloses a novel sinter mixture bunker steam preheating device, which belongs to the technical field of sinter mixture bunker steam preheating, and comprises a boiler steam distribution drum, a heat preservation pipe is arranged at the top of the boiler steam distribution drum, an efficient steam-water separator is arranged at one end of the heat preservation pipe, a control valve is arranged in the efficient steam-water separator, and the control valve is connected with the steam distribution drum. A support frame is arranged at the bottom end of the efficient steam-water separator; according to the utility model, the thermal insulation pipe is arranged, the thermal insulation cotton and the thermal insulation pipe are used for protection through the design, so that the temperature loss of steam in the steam pipe is avoided, and then the heated sintering mixture ore tank is arranged on one side closer to the ignition furnace, so that the mixture can immediately enter the ignition furnace for ignition after being heated, and the heat loss in the conveying process is reduced; the air permeability of a material layer is improved, the thickness of a sintered material layer is increased, and the yield and quality of sintered ore are greatly improved.