885results about "Preheating charges" patented technology

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 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 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 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 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 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 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 invention discloses roasting furnace equipment for quartz stone production, and relates to the technical field of roasting furnaces, the roasting furnace equipment comprises a supporting frame, the upper side of the supporting frame is fixedly connected with a base, and one side of the base is provided with a collecting mechanism for storing high-temperature quartz stone fragments; a heating mechanism used for evenly roasting quartz stone fragments is arranged on the upper side of the base, through limiting of each blade of a spiral rotating blade, the phenomenon that too much quartz stone is stacked in partial areas due to the fact that the quartz stone fragments roll to other areas when the rotating drum rotates is effectively prevented, the even roasting effect is achieved, and the service life of the quartz stone fragments is prolonged. While the spiral rotating blades rotate, the quartz stone fragments can be driven to be transported to fall into the collecting box, and the spiral rotating blades can also be driven to rotate to scrape off the quartz stone fragments adhered to the pipe wall, so that the quartz stone fragments fall into the collecting box together, and the situation that part of the adhered quartz stone fragments cannot fall off through inclination is effectively prevented; and the resource waste phenomenon is avoided.

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.

The utility model provides a hot air circulation system for raising the temperature of a hearth of a roasting machine, which comprises a forced air drying section, an air draft drying section, a preheating section, a roasting section, a soaking section, a first cooling section, a second cooling section and a third cooling section which are sequentially arranged, the second cooling section comprises a front second cooling section and a rear second cooling section which are independently arranged, and a partition wall is arranged between the front second cooling section and the rear second cooling section. Outlets of the front secondary cooling section and the primary cooling section are communicated with flue gas inlets of the soaking section and the roasting section through pipelines, and an outlet of the rear secondary cooling section is communicated with a flue gas inlet of the preheating section through a pipeline. According to the hot air circulating system, the secondary cooling section is divided into two parts, flue gas recovered by the rear part with lower temperature enters the preheating section and does not enter the roasting section, but flue gas with higher temperature in the front section is recovered and introduced into the roasting section, so that the hot air temperature of the roasting section is increased, the temperature of a hearth is increased, and the energy consumption is reduced under the same condition. And the pellet quality requirement can also be met by using the low-calorific-value fuel, so that the production cost is reduced.

The utility model relates to the technical field of aluminum bar heating furnaces, in particular to a preheating device of an aluminum bar heating furnace, which comprises a preheating furnace body, a preheating chamber arranged on the inner side of the preheating furnace body and inclined towards one side, a plurality of aluminum bars arranged inside the preheating chamber, an aluminum bar inlet arranged at the upper end of the preheating chamber, and an aluminum bar outlet arranged on one side of the lower end of the preheating chamber. A through hole is formed in the other side of the lower end of the preheating chamber, a box body is arranged at the position, located on one side of the through hole, of the preheating furnace body, an ejection mechanism capable of conveniently ejecting out an aluminum bar is arranged in the box body, the ejection mechanism comprises a motor and an ejection rod, the motor is fixedly arranged in the box body, and a rotating disc is fixedly arranged at the output end of the motor; a strip-shaped frame is arranged on the upper side of the rotary disc, and a guide block is slidably arranged in the strip-shaped frame. According to the aluminum bar preheating device, a plurality of aluminum bars can be preheated at the same time conveniently, the aluminum bars can be conveyed and fed automatically, and the automation degree is high.

The invention discloses a preparation method of a nickel-boron intermediate alloy for a nickel-based superalloy, which comprises the following steps: step 1, mixing boric anhydride powder and nickel protoxide powder, pressing to obtain a pre-combination reaction block, mixing metallic nickel and carbon powder, and pressing to obtain a thermal reduction reaction block; 2, the pre-combination reaction block is heated to be molten to obtain a molten product, then the molten product and the thermal reduction reaction block are mixed for a carbon thermal reduction reaction, and an alloy melt is obtained; 3, casting the alloy melt under a vacuum condition, and cooling to obtain a nickel-boron intermediate alloy; the invention further discloses a preparation device of the nickel-boron intermediate alloy for the nickel-based high-temperature alloy. According to the preparation method disclosed by the invention, the pre-chemical combination and carbon thermal reduction processes are adopted, so that the formation of a boron-rich phase is effectively inhibited, the fluctuation increase and non-uniform distribution of the boron element content are avoided, a guarantee is provided for the subsequent proportioning link of the nickel-based high-temperature alloy, and the preparation method is suitable for the technical field of intermediate alloy preparation.

The invention discloses a system and a method for preparing kaolin by calcining and whitening coal gangue, the system comprises a preheater, a calcining furnace, a heat preservation bin and a cyclone cooling unit which are communicated in sequence, a blanking pipe of a penultimate cyclone separator of the preheater is connected with the calcining furnace, a combustor is arranged on the calcining furnace, and the cyclone cooling unit is connected with the calcining furnace. A discharging pipe of the cyclone separator at the bottom end of the preheater is connected with the calcining furnace and the heat preservation bin respectively; the cyclone cooling unit comprises a first cooling unit and a second cooling unit; a discharging port of the heat preservation bin is connected with a feeding port of the first cooling unit, and a discharging port of the first cooling unit is connected with a feeding port of the second cooling unit. The decarburization time is prolonged by adopting calcining furnace material circulation and a heat preservation bin, so that carbon in the coal gangue is completely removed, the whiteness of the kaolin product is further improved, the production line is energy-saving and emission-reducing, the product quality is stable, the process flow and equipment are simple, carbon emission reduction is realized, the production line is suitable for large-scale industrial production, the cost is reduced, and the cost performance is high.

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.