1185results about "Preheating charges" patented technology

The utility model relates to the technical field of melting furnaces, in particular to a melting furnace structure for aluminum alloy production, which aims at solving the technical problem of overcoming the defects of feeding and internal structure disassembly of a melting furnace in the prior art and is mainly realized through the following technical scheme. Comprising a furnace body, a heating device and a support and further comprises a melting inner container, a feeding device and a stirring device, the melting inner container comprises a feeding cavity, a preheating cavity and a heating cavity, the feeding device comprises a feeding belt and a material blocking plate, the stirring device comprises a stirring shaft, a plurality of stirring blades and a driving part, the melting inner container and a melting chamber are arranged to generate a heat storage area, and the heat preservation time of the melting furnace is prolonged; the fed aluminum ingots are preheated and softened in the preheating cavity and then fall into the heating cavity, damage to the furnace bottom is reduced, the service life of the melting furnace is prolonged, the melting speed of the aluminum strips is increased through movement of the stirring device, local adhesion of the aluminum ingots is avoided, and the using effect of the melting furnace is guaranteed.

The invention discloses high-purity quartz sand purification equipment in the technical field of quartz sand purification equipment, and the high-purity quartz sand purification equipment comprises a hopper, a preheating rack, a furnace tube supporting frame, a preheating furnace, a rotating tube motor, a high-temperature furnace rack, a horizontal high-temperature reaction furnace, a vertical high-temperature reaction furnace and a cold sand rack, a vibration feeding hopper is arranged at the bottom of the hopper, and a vibrator is arranged at the bottom of the vibration feeding hopper; a preheating furnace tube is arranged at the right end of the preheating furnace, a sand receiving hopper is arranged at the left end of the preheating furnace, a quartz furnace tube is arranged at the left end of the horizontal high-temperature reaction furnace, a second sand receiving hopper is arranged at the left end of the quartz furnace tube, and a sand separating hopper is arranged at the bottom of the second sand receiving hopper. The quartz sand in a high-temperature state enters the horizontal high-temperature reaction furnace, so that the temperature of the quartz sand can be quickly increased to the temperature required by the purified gas, the heating time is shortened, the reaction time of the quartz sand and the purified gas is prolonged, and the product quality is improved.

The invention relates to the technical field of energy conservation and carbon reduction in metallurgy, and provides a low-carbon sintering flue gas circulation system and purification process for multi-pollutant collaborative treatment, the low-carbon sintering flue gas circulation system and purification process are used for staged treatment of sintering flue gas, and the low-carbon sintering flue gas circulation system comprises a sintering chamber which is provided with a sintering cavity and a flue gas blowing port; the sintering cavity leads to the high-sulfur air duct or the low-sulfur air duct, and the low-sulfur air duct leads to the flue gas blowing port; and the high-sulfur air duct leads to the first flue gas treatment system. By means of the technical scheme, the problem that in the prior art, energy consumption for treating flue gas generated after sintering of sintering ore is high is solved.

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 an intelligent temperature-controlled track kiln for sintering red mud-based ceramics, and relates to the technical field of track kilns, comprising: a bracket, in which input tracks and output tracks are distributed up and down; an upper tunnel kiln, in which the input track is located, and is used for preheating ceramics and drying glaze; a lower tunnel kiln, in which the output track is located, and is used for cooling and curing ceramics; a vertical kiln, which is used for heating and sintering ceramics, and is provided with a three-dimensional spiral track inside, in which the input end of the spiral track is connected to the input track, and the output end is connected to the output track, and the upper tunnel kiln and the lower tunnel kiln are connected to the vertical kiln to realize continuous processing of ceramics from preheating to sintering and then to cooling; a plurality of connecting channels are distributed between the upper tunnel kiln and the lower tunnel kiln, and a fan is installed in each connecting channel; the invention has the beneficial effects of continuous processing flow, efficient thermal energy utilization, air flow optimization, strong adaptability, and the like.

The utility model relates to the technical field of metallurgical energy conservation, in particular to a power generation device for preheating by using submerged arc furnace gas power generation tail gas as a heat source, which comprises a submerged arc furnace, a submerged arc furnace gas recovery processing device, a gas generator set, a denitration and desulfurization device and a preheating device, the submerged arc furnace gas recovery processing device is connected with the submerged arc furnace and the gas generator set and used for purifying gas generated by the submerged arc furnace and then sending the purified gas to the gas generator set for power generation, and the denitration and desulfurization device is connected with a tail gas exhaust port of the gas generator set and used for conducting denitration and desulfurization treatment on tail gas generated after power generation. The denitration and desulfurization device is connected with the preheating device and used for feeding tail gas subjected to denitration and desulfurization into the preheating device to preheat materials, and the preheating device is connected with the submerged arc furnace and used for feeding the preheated materials into the submerged arc furnace for smelting, so that energy waste caused by direct emission of high-temperature tail gas generated after power generation is avoided; and the demand on external energy in the preheating process is also reduced.

The utility model belongs to the technical field of electrolytic aluminum production, and particularly relates to an electrolytic aluminum sampling spoon preheating box which comprises a preheating box body, the preheating box body comprises a metal frame, a box door is arranged on the front face of the metal frame, and metal plates are arranged on the top face, the bottom face, the left side face and the right side face of the metal frame except the back face. The back face of the metal frame is fixed to the outer wall of the smelting furnace body, and the outer wall of the smelting furnace body serves as a back plate of the preheating box body. And a plurality of hooks which are arrayed are arranged in the box body and on the outer wall of the smelting furnace body. By designing the electrolytic aluminum sampling spoon preheating box, the sampling spoon is fully preheated and always kept dry, so that the phenomenon of explosion caused by contact between the wet sampling spoon and high-temperature molten aluminum is avoided, the scalding danger is effectively reduced, and the safety in the production process 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 low-energy-consumption calcining system comprises a preheater, a calcining furnace, a rotary kiln and a multi-stage cyclone cooler which are sequentially connected, the multi-stage cyclone cooler comprises a heat recovery unit and a cooling unit, clinker discharged from the rotary kiln directly enters the multi-stage cyclone cooler to be cooled, and the clinker discharged from the calcining furnace enters the multi-stage cyclone cooler to be cooled. Wherein a discharge port of the heat recovery unit is connected with an air inlet of the cooling unit, an air outlet of the cooling unit is connected with the air inlet of the heat recovery unit through a branch air pipe, a high-temperature fan is arranged between the cooling unit and the heat recovery unit, and clinker is fed into the air pipe between the high-temperature fan and the heat recovery unit. And an air outlet of the heat recovery unit is connected with the calcining furnace through a tertiary air pipe. The device has the functions of calcining, cooling and recovering heat of the kaolin, a high-whiteness kaolin product is obtained, and the energy consumption of the system is reduced at the same time.

High temperature furnaces, calcining, pyrolysis and other high temperature manufacturing processes, composition rearrangements, and equipment. Systems, equipment and processes using oxyfuel combustion using gaseous fuels for cement manufacture. Reactor furnaces using oxyfuel containing natural gas and gravity feed to process pellets forming a pellet bed into cement.

The invention discloses a preparation method and a preparation system of a silicon-carbon negative electrode material, and the method comprises the following steps: conveying a porous carbon raw material into a deposition furnace, introducing inert gas to replace air in the deposition furnace, and vacuumizing the deposition furnace; raising the temperature of a deposition furnace to 300-800 DEG C, mixing inert gas with the preheated silicon source gas, and introducing the mixture into the deposition furnace for chemical vapor deposition to obtain a silicon-carbon composite material precursor; raising the temperature of a buffer furnace to 300-800 DEG C, conveying the precursor into the buffer furnace, and carrying out chemical vapor deposition by utilizing residual silicon source gas in the buffer furnace; carrying out gas-solid separation on the material in the buffer furnace, conveying the solid to a cladding furnace, detecting the gas, and detecting the content lt of the silicon source gas; and (2) adding 0.2 mg / L of the silicon-carbon composite material into the coating furnace, introducing coating gas into the coating furnace, and performing carbon deposition coating to obtain the silicon-carbon composite material. The preparation system disclosed by the invention is a continuous preparation system, so that the production efficiency is greatly improved, and the requirements of large-scale production are met.

The invention discloses a grate-rotary kiln pellet flue gas multi-pollutant stage treatment device and process. Comprising an SCR process denitration and dust removal system connected with a flue gas outlet of a preheating second section of a chain grate, a semi-dry method circulating fluidized bed desulfurization and dust removal system connected with a flue gas outlet of a drying second section of the chain grate, and a dry method desulfurization and dust removal system connected with a flue gas outlet of a drying first section of the chain grate. According to the process characteristics of the chain grate-rotary kiln, the pollutant generation mechanism and the characteristics of the flue gas, the whole device treats the pellet flue gas in a segmented and graded mode. According to the invention, beneficial components in the flue gas can be recovered, various pollutants can be efficiently treated, secondary pollution such as waste water is not generated, energy is saved, and the method has wide social and economic benefits.

To provide a sintered compact production apparatus which can reduce the cooling power of a microwave oscillator and further can reduce the heating energy of an object to be heated caused by microwaves.SOLUTION: A sintered compact production apparatus 1 provided with a microwave heating device 2 having a microwave oscillator 21 which oscillates microwaves, a wave guide 22 which is connected to the microwave oscillator 21 and a microwave heating furnace 23 where the microwaves are propagated via the wave guide 22, and is configured to heat an object 5 to be heated in the microwave heating furnace 23 with the microwaves, comprises: an air cooling type cooling device 4 which feeds air to the microwave oscillator 21 and cools the same; and a preheater 3 which preheats the object 5 to be heated with the air which has fed from the air cooling type cooling device 4 to the microwave oscillator 21 and has recovered heat generated in the microwave oscillator 21.SELECTED DRAWING: Figure 1

The invention relates to the technical field of magnesium oxide calcination, and particularly discloses a suspension calcination system and method capable of adjusting the activity of light calcined magnesium oxide. Comprising a multi-stage preheater, a suspension calcining furnace connected with the multi-stage preheater, a high-temperature section cyclone cooler which is respectively connected with the multi-stage preheater and the suspension calcining furnace and is used for conveying flue gas subjected to heat exchange to the suspension calcining furnace, and a low-temperature section cyclone cooler connected with the high-temperature section cyclone cooler, a plurality of layers of combustors used for realizing gradient distribution and partitioned combustion of the temperature in the suspension calcining furnace are arranged in the suspension calcining furnace; according to the invention, the distribution valve, the multi-layer combustor and the high-temperature section cyclone cooler are connected with the suspension calcining furnace, the distribution valve is adjusted for distribution circulation, the multi-layer combustor realizes partitioned combustion, and residual air after heat exchange of the high-temperature section cyclone cooler is used for cooperation, so that the activity index of light-burned MgO is adjusted and controlled in stable and continuous production, and the production efficiency is improved. The product quality requirement is met.

The electric furnace for steel rolling comprises a bottom plate, an electric furnace body and an exhaust pipe inserted into the top face of the electric furnace body, a filter plate is movably arranged in the exhaust pipe, and a cleaning mechanism is arranged on the surface of the filter plate; the cleaning mechanism comprises a sleeve rotationally arranged in the filter plate, a rotating rod is arranged in the sleeve, a fixing block is fixedly arranged at the bottom end of the rotating rod, scrapers are fixedly arranged on the two sides of the fixing block through connecting rods, and a scraping plate is fixedly arranged on the top surface of each connecting rod through a supporting rod. The invention relates to the technical field of electric furnaces. According to the electric furnace for steel rolling, through the arrangement of the cleaning mechanism, dust and other residues attached to the surface of the filter plate and the inner wall of the exhaust pipe can be scraped and cleaned, manual cleaning by personnel is not needed, the working intensity is relieved, the situation that the circulation speed of waste gas is affected due to residue accumulation can be avoided, and the subsequent heat recovery work of high-temperature waste gas is accelerated.

The invention discloses a pre-heating and pre-decomposing device and method for co-production of acid from ardealite and outside a cement kiln, and the device is characterized in that pretreated ardealite, a siliceous raw material and an aluminum raw material are prepared into a raw material according to a specific proportion, the raw material is fed into a pre-heating system, and the raw material and hot flue gas from a decarburization and desulfurization furnace are subjected to countercurrent suspension pre-heating; the preheated mixture enters a decomposing furnace, is subjected to suspension reductive decomposition with reductive hot flue gas from a gasification furnace, and then is mixed and oxidized with high-temperature and high-oxygen air from a kiln head, so that a hot raw material with relatively high calcium oxide content is obtained; and the hot raw material enters the rotary kiln and is further subjected to mineralization reaction with the silicon-aluminum correction material to generate cement clinker. According to the method for co-producing acid from ardealite and preheating and pre-decomposing outside the cement kiln, preheating and decomposing of ardealite are completed in a suspended state, decomposing of ardealite in the kiln is converted into decomposing outside the kiln, and the effects of being high in heat and mass transfer efficiency, high in reducing agent utilization rate, high in production efficiency, low in system energy consumption, cost-reducing and efficiency-increasing can be achieved.

The utility model relates to the technical field of annealing furnace equipment, and provides a heating device of a galvanized strip steel annealing furnace, which comprises a furnace body and a cooling cavity, the cooling cavity is arranged in the furnace body, a conveying roller is mounted in the furnace body, a first motor is mounted on the side surface of the furnace body, and the output end of the first motor is connected with the conveying roller. The fuel gas heating assembly is arranged inside the furnace body, the cooling return air preheating assembly is arranged outside the furnace body and comprises a negative pressure fan, the negative pressure fan is installed at the top of the cooling cavity, a pair of gas cavity plates is arranged in the furnace body, the gas cavity plates are communicated with each other, and a constant-temperature cavity is formed in the furnace body. According to the technical scheme, the problems that in the prior art, a preheating mode of an existing annealing furnace is large in energy consumption, in the annealing treatment process, gas used for cooling is directly discharged, a heat source cannot be recycled, energy consumption is large, and the influence on the surrounding ring is large are 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 present invention discloses a low-energy preheating device for chemical raw materials of a chemical furnace, which relates to the technical field of raw material preheating and mixing, comprising: a mixing furnace, which is arranged on the top of the ground, and is used to stir and mix chemical raw materials; an exhaust gas box, which is arranged on the top of the mixing furnace, and is used to preheat chemical raw materials; a discharge pipe, which is fixedly installed on the rear side of the exhaust gas box; a connecting pipe one, which is fixedly installed on the left side of the exhaust gas box; a connecting pipe two, which is fixedly installed on the left side of the mixing furnace; a mixing frame that moves back and forth to stir the chemical raw materials inside the exhaust gas box, thereby improving the contact area and mixing efficiency between the reaction gas and the chemical raw materials. The back and forth movement of the mixing frame can effectively stir the chemical raw materials inside the exhaust gas box, and promote sufficient contact and mixing between the reaction gas and the raw materials.

The invention belongs to the field of industrial silicon submerged arc furnace smelting, and provides a closed industrial silicon submerged arc furnace which comprises a submerged arc furnace body, a supporting platform is arranged above the furnace body, and a discharging uniform distribution device, a flue gas emission system, an electrode operation system, a feed system and a two-dimensional space movement furnace ramming device are arranged above the supporting platform. A water-cooling closed smoke hood is fixed below the supporting platform, a furnace charge preheating device is arranged at the top end in the water-cooling closed smoke hood, a three-dimensional space movement furnace ramming device, an electrode operation visible system and an explosion-proof device are arranged on the side part of the water-cooling closed smoke hood, and an oxygen blowing refining device and a continuous silicon discharging device are arranged on the side part of the furnace body; and a furnace body rotating system is also arranged at the bottom of the furnace body. The problems that the industrial silicon submerged arc furnace is high in energy consumption, large in emission, low in efficiency and the like in the smelting operation process are solved, and the beneficial effects of low consumption, less emission, zero emission and the like are achieved.

The utility model relates to the technical field of metal smelting, in particular to a high titanium slag raw material pretreatment device which comprises a heating part, a heating pipe is fixed between the two fixing plates, a plurality of fixing strips are fixed to the inner wall of the heating pipe, and a plurality of electromagnetic induction coils are installed on one side wall of each fixing strip; the high titanium slag can be directly placed in the feeding hopper, along with rotation of the auger, the high titanium slag slowly moves in the discharging pipe, the discharging pipe penetrates through the heating pipe, under the action of the electromagnetic induction coils, the discharging pipe can be heated, the discharging pipe can synchronously transfer heat to the high titanium slag in the discharging pipe, and preheating treatment can be conducted on the high titanium slag; the preheated high titanium slag can be directly discharged into subsequent processing equipment after being discharged through a discharge pipe; according to the design, the high titanium slag can be directly preheated, the high titanium slag does not need to be transferred in the preheating process, the preheating efficiency of the high titanium slag is improved, and the operation risk is reduced.

The invention discloses a lime kiln flue gas recovery system and a flue gas recycling method in iron and steel smelting, and belongs to the technical field of iron and steel smelting resource recycling. The system comprises a lime production system, a fly ash utilization system and a preheated flue gas utilization system, the lime production system communicates with the fly ash utilization system and the preheated flue gas utilization system, the lime production system conveys fly ash flue gas to the fly ash utilization system, and the lime production system conveys preheated flue gas to the preheated flue gas utilization system; and the preheated flue gas utilization system conveys fuel to the lime production system through the fly ash utilization system. According to the invention, flue gas and substances and energy derived in the flue gas recycling process are fully utilized by adopting abundant flue gas recycling means, so that the emission of available substances and energy is reduced to the greatest extent, and the flue gas generated in the lime production process and the substances and energy derived in the flue gas recycling process have higher utilization rate; the energy consumption is obviously reduced, the waste is reduced, and the flue gas pollution is reduced.

The invention relates to the technical field of casting sand production, and discloses a drying sand and roasting sand universal type heat recovery system which comprises a box body, a boiling device is arranged on the box body and used for suspending and fluidizing sand particles, and a heat recovery device is arranged on the box body and used for collecting heat from gas exhausted from the boiling device. The heat recovery device comprises two gas collecting hoods, the two gas collecting hoods are both communicated with the top of the box body, used for collecting high-temperature gas generated in the box body and connected with a cyclone dust collector through a sixth pipeline, and the cyclone dust collector is connected with a second induced draft fan through a fourth pipeline and connected with a kiln and a burner through a fifth pipeline. The device is used for heating casting sand or other materials by using the recovered heat. And through comprehensive application of the boiling device and the heat recovery system, heat energy recovery in the production of the roasting sand for casting is realized, and the production cost and the energy consumption are effectively reduced.

The invention relates to the technical field of cement clinker calcination, and provides a solar condensation cement clinker direct calcination waste heat two-way grading utilization system which comprises a preheating module, a heat exchange module, a heat exchange module, a heat exchange module and a heat exchange module which are arranged in the material flow direction, the preheating module comprises a first preheating unit and a second preheating unit; the clinker reactor is arranged at the downstream of the preheating module and is used for calcining raw materials; a decomposed gas outlet of the clinker reactor is connected to the first preheating unit; the cooling machine is arranged at the downstream of the clinker reactor and is used for cooling the clinker; a waste gas outlet of the cooler is connected to the second preheating unit, and an air locking valve is arranged between the reactor and the cooler for tight isolation to prevent waste gas of the cooler from entering the reactor. Through the arrangement, heat in the decomposed gas and heat in the clinker cooling waste gas can be independently utilized, so that the purity of CO2 in the decomposed gas is guaranteed while waste heat is fully recycled and utilized, and the follow-up capture difficulty and capture cost of CO2 are reduced.

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 utility model discloses a waste lead-acid storage battery lead recovery smelting furnace, and particularly relates to the technical field of secondary lead recovery, the waste lead-acid storage battery lead recovery smelting furnace comprises a smelting furnace, a smoke exhaust pipe is fixedly installed on the top of the smelting furnace, a feeding device is fixedly installed on the upper portion of the side wall of the smelting furnace, and a heat exchange assembly is fixedly installed outside the feeding device. The end, away from the smelting furnace, of the smoke exhaust pipe is fixedly connected with the heat exchange assembly. According to the lead recovery smelting furnace for the waste lead-acid storage battery, the heat exchange feeding device and the heat exchange assembly are matched with each other, smelting materials in the feeding barrel can be preheated, meanwhile, in the heat exchange process, spiral plates of the heat exchange assembly rotate to scrape away dust accumulated on the inner wall of the heat exchange barrel, and therefore the heat exchange efficiency is improved. And then the smoke is conveyed into the collecting pipe and finally collected into the collecting box, and the situation that the smoke is accumulated in the heat exchange cylinder for a long time, so that the heat exchange function of the heat exchange cylinder is affected, and the smelting material cannot be preheated is avoided.

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 utility model relates to the field of lime production, in particular to a preheating device for lime production. Comprising a preheating box, a preheating cavity is formed in the preheating box, two sets of servo motors are symmetrically arranged at the top of the preheating box, the output ends of the two sets of servo motors penetrate through the preheating box and then are in transmission connection with a set of connecting rods, and a set of fixing discs is installed at the bottom of each set of connecting rods; a plurality of sets of heat conduction pipes are installed at the bottom of each set of fixing discs in an annular array mode, a set of heating mechanisms are arranged in each set of heat conduction pipes, two sets of ventilation openings are symmetrically formed in the edge of the top of the preheating box, a set of dustproof nets are arranged in each set of ventilation openings, and a material storage box is arranged over the preheating box; a plurality of sets of supporting columns are distributed at the bottom of the storage box in an annular array mode, and the bottom of each set of supporting columns is installed on the top of the preheating box. According to the embodiment, materials are uniformly preheated, and the production quality is improved.

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.