607results about "Handling discharged material" patented technology

The invention discloses a welding slag ladle for containing copper slag and a design method. The welding slag ladle is suitable for containing, cooling and inverted placing procedures of high-temperature copper slag. The cinder ladle comprises a cylinder body, a ladle bottom, rib plates, trunnions and supporting legs, the cylinder body and the ladle bottom are formed by welding high-temperature-resistant and high-strength rolled plates, the thickness of the cylinder body is 70-100 mm, and the thickness of the ladle bottom is 80-120 mm; setting an inclination angle beta of 11.5-21 degrees relative to the center line of the bus of the cylinder body, and controlling the roughness of the inner wall to be less than or equal to 12.5 microns so as to reduce the separation resistance after the copper slag is cooled; thickness combination, stress distribution, deformation and rib plate arrangement are optimized through structural mechanical simulation, and it is ensured that the structural strength meets the requirements under high temperature and thermal cycle loads; full penetration weld joints are adopted, nondestructive testing is carried out, and the welding reliability is guaranteed; compared with a traditional casting cinder ladle, the mass of the cinder ladle is reduced by 10%-15%, the deslagging efficiency is improved, the service life is prolonged to more than two times of the original service life, and the cinder ladle has the advantages of being light in structure, high in bearing capacity, high in deformation resistance and good in maintainability.

The invention provides a petroleum coke drying and calcining system, which belongs to the technical field of tar treatment and comprises a feeding bin, a waste heat rotary drying furnace, a calcining furnace, a slag cooler, a receiving bin and a tail gas incineration chamber connected with the calcining furnace. The green petroleum coke raw material is fed into a waste heat rotary drying furnace to be dried; a drying furnace water vapor outlet, a drying furnace smoke outlet and a drying furnace waste heat tail gas inlet are formed in the waste heat rotary drying furnace; high-temperature tail gas generated by calcining and volatilizing materials in the calcining furnace enters the tail gas incineration chamber through the calcining furnace tail gas volatilization opening, and high-temperature tail gas generated by mixed combustion of the high-temperature tail gas and fuel gas entering the tail gas incineration chamber enters the calcining furnace and reversely flows with the materials in the calcining furnace to calcine the materials in the calcining furnace, so that primary utilization of the tail gas is realized. The high-temperature tail gas is calcined to absorb heat to form low-temperature tail gas, and the low-temperature tail gas enters the waste heat rotary drying furnace to dry materials, so that secondary utilization of the tail gas is realized, and the problems of low integration degree, high production cost and low treatment efficiency are solved.

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 utility model relates to the technical field of waste heat recycling, and particularly discloses a waste heat recycling device of a sintering circular cooler, which comprises a dust removal structure and a heat exchange structure connected with the dust removal structure, and the dust removal structure comprises a primary cyclone dust removal assembly and a secondary cyclone dust removal assembly communicated with the top of the primary cyclone dust removal assembly. An air blowing assembly is arranged at the top of the secondary cyclone dust removal assembly; the heat exchange structure comprises a supporting frame, a first heat exchange tank and a second heat exchange tank, wherein the first heat exchange tank and the second heat exchange tank are horizontally installed on the supporting frame. Heat exchange pipe sets are arranged in the first heat exchange tank and the second heat exchange tank. The sintering circular cooler waste heat recovery device achieves efficient dust removal and waste heat recovery of high-temperature waste gas, has the advantages of being simple in structure, convenient to maintain, high in heat exchange efficiency and the like, and is suitable for the field of sintering circular cooler waste heat recovery in steel smelting and other industries.

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 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 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 utility model relates to the technical field of cooling devices of roller slag coolers, in particular to a multi-stage cooling device of a roller slag cooler, which comprises an outer roller, an inner roller is mounted on the inner wall of the outer roller, a left roller cover is mounted on the left side of the outer roller, and a right roller cover is mounted on the right side of the outer roller. A discharging opening is formed in the lower end of the right roller cover, an air cooling connector is installed on the surface of the left roller cover and communicates with a gap between the outer roller and the inner roller, a cooling assembly is installed in the right roller cover, and the cooling assembly comprises a rotating connector. According to the utility model, the cooling assembly is arranged, so that the pipelines for conveying the cooling medium are distributed in a multi-stage manner, and the cooling medium can be quickly discharged after the circulation path of the cooling medium is a circle, so that the problems that the circulation path of the cooling medium is repeated, the cooling effect of the cooling medium in the rear area is reduced, and the cooling of the equipment is unbalanced are solved; and the cooling effect and the balance of the cooling device are further improved.

The invention discloses a flexible transmission structure of a circular cooler. Comprising a flexible base, a driving component is arranged on the flexible base, and a transmission pin gear is arranged on an output shaft of the driving component. Self-adaptive adjustment of the driving component in the radial direction of the rotary body can be achieved, so that tight meshing of the transmission pin gear and the rotary body pin teeth is ensured. The device is high in impact load resistance, reliable in work, compact in structure and convenient to install and maintain.

The utility model relates to the technical field of grate coolers, and provides a grate cooler air inlet structure which comprises a machine body, a supporting plate, a blowing assembly, a conveying pipe and an adjusting assembly, the blowing assembly is arranged on the supporting plate, one end of the conveying pipe is connected with the blowing assembly, and the other end of the conveying pipe penetrates out of the machine body; the adjusting assembly comprises a motor, a rotating pipe, a supporting pipe, a first gear, a second gear, a threaded rod and a limiting rod, the motor, the rotating pipe and the supporting pipe are all arranged on the inner wall of the machine body, the motor drives the first gear to rotate, the first gear is meshed with the second gear, the second gear is arranged on the rotating pipe, and the threaded rod is sleeved with the rotating pipe in a threaded mode; the end, away from the rotating pipe, of the threaded rod is connected with the supporting plate, one end of the limiting rod is connected with the supporting plate, and the other end of the limiting rod is slidably installed in the supporting pipe. By arranging the adjusting mechanism, the distance between the blowing assembly and the clinker on the grate plate can be adjusted according to the size of the clinker, and the cooling efficiency of the clinker is improved.

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 utility model discloses a circular cooler track back-up roll self-lubricating device which comprises a back-up roll self-lubricating assembly, the back-up roll self-lubricating assembly comprises a roll shaft sleeve, the inner wall of the roll shaft sleeve is rotatably connected with a circular cooler track back-up roll, the inner wall of the roll shaft sleeve is provided with a cavity, the outer wall of the top of the roll shaft sleeve is fixedly connected with a feeding pipe, and the outer wall of the top of the feeding pipe is fixedly connected with a discharging pipe. The outer wall of the top of the feeding pipe is in threaded connection with a sealing cover, a self-lubricating cylinder is installed on the inner wall of the roller shaft sleeve, and the outer wall of the self-lubricating cylinder is rotationally connected with the outer wall of the roller shaft sleeve in a matched mode. The graphite powder plays a role in lubricating the outer wall of the circular cooler track supporting roller, and the discharging holes are formed in the inner wall of the self-lubricating cylinder, so that the graphite powder in the cavity is slowly released to the outer wall of the circular cooler track supporting roller, and continuous automatic lubrication is facilitated.

The present application relates to a rotary kiln cooler with external air chamber, comprising upper bin body, ring beam, central air distributor, chamber air distributor, lower cone bin, discharging cone and air supply pipeline; the rotary kiln cooler uses two different cooling methods to cool materials at different heights; in the upper part of the cooler, a plurality of air distributors embedded in the material layer and adapted to the shape characteristics of the material layer directly supply air to the material layer for pre-cooling; in the lower part of the cooler, the material is divided into multiple streams, and a plurality of air supply chambers are arranged to achieve uniform cooling in multiple regions; the cooler has simple structure, low material cooling temperature, can cool high-temperature materials from about 1100 DEG to more than 30 DEG to 50 DEG above room temperature, and has sufficient cooling, no red material inclusion, high thermal efficiency, and remarkable energy saving and emission reduction effect.

The utility model relates to a snowman sealing device, which relates to the technical field of snowman devices and comprises a material pushing tongue, a castable wall is arranged outside the material pushing tongue, a sheath shell is sleeved outside the material pushing tongue, the sheath shell is fixedly connected with the castable wall, a metal nozzle is fixedly communicated with the outer wall of the sheath shell, and the metal nozzle is fixedly communicated with the metal nozzle. The metal nozzle is fixedly communicated with a high-pressure hose, the high-pressure hose is provided with an electromagnetic valve, a fixing flange is fixedly installed on the outer wall of the sheath shell, a two-layer flange is installed on the fixing flange through hexagon socket screws, and a pressing flange is installed on the two-layer flange through fastening bolts. According to the material pushing device, ash can be blown into equipment to prevent ash leakage, meanwhile, the tongue can be cooled during air blowing, and the temperature of the material pushing tongue is reduced.

To provide a slag aging method with which it is possible to reduce variation in aging of slag by inhibiting variation in grain size and porosity of the slag at locations of a sediment different from each other even when the sediment is formed by stacking slags different in grain size and porosity in an aging processing facility, and with which it is possible to inhibit expansion of a product using the slag after aging.SOLUTION: An aging method for slag stacked in an aging processing facility 1, 10 includes: a calculation step of calculating at least one of a grain size and a porosity by sampling slag from at least two locations of at least one of the slag stacked in the aging processing facility 1, 10 and slag that forms a sediment 3; and an adjustment step of adjusting at least one of a grain size and tightness of the slag at a first location of two locations on the basis of at least one of the grain size and porosity of the slag.SELECTED DRAWING: Figure 4

The utility model discloses a steelmaking continuous casting machine waste heat recycling device which comprises a conveying pipe and a heat exchanger, an annular blocking plate is arranged at the casting blank inlet end of the conveying pipe, a plurality of annular cavities are sequentially formed in the conveying pipe at intervals from the casting blank inlet end to the casting blank outlet end, and each annular cavity is connected with a cold air pipe. A plurality of air nozzles are uniformly distributed on the circumference of the side wall of the side, facing the annular blocking plate, of the annular cavity, cooling cavities are formed between the adjacent annular cavities and between the annular blocking plate and the annular cavities, a plurality of conveying rollers are arranged in the cooling cavities, an exhaust pipe is arranged on the side wall of the side, close to the annular blocking plate, of the cooling cavity, and a heat exchange pipe assembly is arranged in the heat exchanger. The exhaust pipe is communicated with an inlet of the heat exchange pipe assembly, a water supplementing opening is formed in the heat exchanger, an air compressor and a vortex tube which are communicated are arranged on the outer side of the conveying pipe, and a cold air outlet of the vortex tube is communicated with the cold air pipes. In conclusion, the casting device has the advantages of being small in heat loss, high in casting efficiency and high in heat recovery rate.

The utility model relates to the technical field of iron and steel smelting, and provides a material accumulation prevention device of a ring cooling trolley, which comprises the ring cooling trolley, an air pipe assembly and a dust removal assembly, the dust removal assembly comprises a dust cover, and the dust cover is arranged above the ring cooling trolley; the annular cooling trolley is provided with a trolley body, the annular cooling trolley has a cooling mode and a discharging mode, and when the annular cooling trolley is in the discharging mode, the annular cooling trolley walks on the curved surface track; the curved rail comprises a curved rail climbing section, the air pipe assembly is arranged on the curved rail climbing section, a right angle is formed at the front end of the annular cooling trolley and at the joint of the supporting plate and the upper face of the trolley body, and a rib plate is arranged at the right angle. According to the utility model, the vicious fault that the trolley collapses at the bent rail due to the fact that the hinged support of the annular cooling trolley is easy to break due to stress is solved, the maintenance efficiency is improved, the maintenance cost is reduced, the structure is simple, the installation is convenient, and the universality is good.

The utility model provides an annular cooler bulk material conveying system which comprises a wind conveyor, a conveying pipeline, a discharge hopper and a dust removal device, the wind conveyor is arranged at the head end of the conveying pipeline, the discharge hopper is arranged at the tail end of the conveying pipeline, and a plurality of air bellow ash hoppers are connected along the line of the conveying pipeline; and the dust removal device is connected with the discharge hopper. The pneumatic conveyor supplies air into the discharge hopper, and the dust removal device draws air from the discharge hopper, so that the pressure of conveyed gas can be balanced, raised dust in the material conveying process can be extracted, the raised dust is prevented from overflowing during discharging, the dust removal cost is greatly reduced, and the dust removal efficiency is improved. The full-closed conveying process is achieved, raised dust is avoided, and bulk materials are fully automatically, efficiently and stably collected and conveyed.

The invention discloses a vertical convection circular cooler. Comprising a rotary disc and a rotary trough mounted on the rotary disc, and the rotary trough rotates along with the rotary disc; a discharge hole is formed in the outer circumference of the bottom of the rotary trough; a sealing cover is arranged above the rotary trough; a plurality of inverted-L-shaped cantilever beams are annularly arranged on the outer side of the rotary trough, and the sealing cover is hung above the rotary trough through the cantilever beams. And the sealing cover does not rotate along with the rotary trough. The device has the advantages of small occupied area, uniform material distribution, few movable parts, less equipment abrasion, long mineral aggregate cooling retention time, energy conservation, environmental protection and the like.

The application discloses a control system and a control method for optimizing clinker cooling of a grate cooler, and aims to provide a control system and a control method for optimizing clinker cooling of a grate cooler, wherein the inside of a box body of the grate cooler is sequentially divided into multiple cooling sections according to the material flow direction, cement clinker formed after raw materials are calcined flows into the cooling sections of the grate cooler, air doors of each air cooling chamber of the cooling sections are sequentially opened to blow and cool the cement clinker, according to the air pressure and the temperature of the current cooling section, the high-pressure cooling air flow above the grate bed is opened or closed, the air pressure on both sides of the grate bed is adjusted, the cement clinker is conveyed through the grate bed in the box body from the feeding end of the grate bed to the discharging end to realize step-by-step blowing and cooling. The application automatically adjusts the air pressure on both sides in the cooling area, solves the problem that the air in the air-filled beam cannot blow through the cement clinker to form a “red river” phenomenon due to air leakage at a position with a thin material layer, and improves the clinker cooling efficiency.

The invention provides a powder material cooling device, and relates to the technical field of powder cooling. The device comprises a feeding bin, a cooling bin and a discharging bin. A feeding pipe is fixedly connected to the center of the upper side wall of the feeding bin, a reducing inner pipe is fixedly connected to the middle of the feeding pipe, and an air inlet pipe is fixedly connected to the outer side wall of the reducing inner pipe. A cooling frame is installed in the cooling bin and composed of a plurality of cooling bent plates arranged in parallel, the cooling bent plates are wavy, a plurality of rows of cooling grooves are formed in the outer side walls of the cooling bent plates, and cooling inner cavities are formed in the cooling bent plates. The discharging bin is installed on the lower side wall of the cooling bin. By optimizing the structure and layout of the cooling bent plate, the contact area and contact time of a powder material and a cooling medium are remarkably increased, and therefore efficient cooling is achieved. Meanwhile, air and powder are mixed through the arrangement of the reducing inner pipe, the flowability of powder materials is improved while precooling is conducted, blocking is prevented, and it is ensured that the materials evenly enter the cooling bin.

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 invention discloses a calcining tank jacket waste heat utilization device and method, and belongs to the field of waste heat utilization, the calcining tank jacket waste heat utilization device comprises a feeding section and a discharging section which are located at the two ends of a calcining tank, the feeding section is sleeved with a low-temperature preheating jacket, and the discharging section is sleeved with a cooling jacket; the width of the cooling jacket is gradually reduced from bottom to top; a cooling outlet and a cooling inlet are respectively formed in the upper part and the lower part of the cooling jacket; a preheating outlet and a preheating inlet are formed above and below the low-temperature preheating jacket; the cooling outlet is communicated with the preheating inlet through a pipeline; the system further comprises an application end heat exchange device, a guarantee end heat exchange device and a water tank, the preheating outlet is communicated with an inlet of the application end heat exchange device through a pipeline, an outlet of the application end heat exchange device is communicated with an inlet of the guarantee end heat exchange device, and an outlet of the guarantee end heat exchange device is communicated with the water tank. By means of the structure, the temperature of the discharging section and the temperature of the feeding section can be controlled, interference to a calcination high-temperature area is reduced, and meanwhile the recycling rate of waste heat in the jacket is increased.

The utility model relates to the technical field of wear-resistant ceramic processing, in particular to a cooling component for wear-resistant ceramic processing, which comprises a bottom plate, an air cylinder mounted on the side surface of the bottom plate, a water tank fixedly connected to the side surface of the air cylinder, a control panel fixedly connected to the outer surface of the water tank, and a refrigeration sheet fixedly connected to the inner wall of the water tank. The inner bottom wall of the water tank is fixedly connected with a temperature sensor, the temperature sensor is electrically connected with the control panel, the control panel is electrically connected with the refrigeration sheet, the top of the water tank is fixedly connected with a cover plate, the surface of the cover plate abuts against a water inlet cover, the top of the cover plate is provided with a suction pump, and the bottom of the suction pump extends into the water tank and communicates with the water tank; the water temperature in the water tank can be monitored in real time through the temperature sensor, when the water temperature is high, the refrigeration piece works through the control panel, then the water is cooled in time, then the cooled water is sprayed to the surface of the ceramic plate through the spraying pipe, and the ceramic plate can be cooled.

The application discloses an enclosed cooling device for industrial silicon, a horizontal mounting plate is fixed to the top of a vertical support plate on one side of a cooling box, a load-bearing plate is fixed to the lower end of a hydraulic cylinder through a connecting shaft, a load-bearing groove with a net-shaped bottom is arranged on the load-bearing plate, when in use, a mold filled with industrial silicon is placed into the load-bearing groove, and the push plate is moved to abut against the two sides of the mold to limit and fix the mold by screwing a threaded rod, a sealing cover is fixed to the connecting shaft, the load-bearing plate and the sealing cover are driven to move downwards by the elongation of the hydraulic cylinder, the mold is submerged in water in the cooling box, and the sealing cover covers the opening of the cooling box, so that the cooling effect is improved, and the generated steam is discharged to a steam treatment equipment through an exhaust pipe for treatment during the cooling process. A spraying plate is arranged on the lower side of the sealing cover, and cold water is supplied to the spraying plate through a water supply pipe during the cooling process, so that the cold water is directly sprayed onto the upper surface of the mold, and the cooling effect and efficiency are further improved.

The utility model relates to an electric heating reaction furnace with a collecting device, which comprises an electric heating furnace, the collecting device is arranged on the right side of the electric heating furnace, the collecting device is used for collecting materials discharged from an outlet of the electric heating furnace, the collecting device comprises a fixed support and an inclined square tube, and the left end of the square tube is communicated with the outlet of the electric heating furnace. A plurality of tuyeres are arranged on the front side of the square pipe at equal intervals from left to right, the rear ends of the tuyeres communicate with the interior of the square pipe, the multiple tuyeres communicate with the same air inlet pipeline, a guide plate is arranged on the right front side of the interior of the square pipe, the left side of the guide plate is rotationally connected with the inner wall of the square pipe, and a push-pull rod is fixedly installed on the front side of the right end of the guide plate. The front end of the push-pull rod penetrates through the square pipe and extends to the outer side of the square pipe, and the air inlet pipeline sprays air flow into the square pipe from the multiple nozzles at a high speed, so that materials heated by the electric heating furnace can more quickly pass through the square pipe and enter a punching machine required by the next process.

The invention provides a control method for realizing waste heat recovery of a circular cooler, which comprises the following steps of: calculating cooling air quantity required by a high-temperature section according to a waste gas temperature set value of the high-temperature section, a heat calculation value of a sintered ore block at a 1 # monitoring point, a heat calculation value of the sintered ore block at a 2 # monitoring point and a waste gas temperature of a low-temperature section; according to the waste gas temperature set value of the medium-temperature section, the heat calculation value of the sinter blocks at the second monitoring point and the heat calculation value of the sinter blocks at the third monitoring point, the cooling air volume needed by the medium-temperature section is calculated; and according to the heat calculation value of the sinter blocks at the 3 # monitoring point and the set average ore temperature and the heat set value of the sinter blocks at the 4 # monitoring point, the cooling air volume required by the low-temperature section is calculated. According to the system, full utilization of waste heat of the high-temperature section, the medium-temperature section and the low-temperature section and the normal cooling effect of the sinter in the circular cooler are achieved, and the triple purposes of controllable sinter cooling, waste heat recycling and frequency conversion electricity saving are achieved.

The present invention relates to the technical field of cement production and in particular to a calcination system and a calcination process for low-carbon cement clinker. The calcination system comprises: a kaolin calcination assembly comprising a preheater and a decomposition furnace; wherein the preheater is provided with a multi-stage cyclone; wherein the preheater is provided with an inlet and an outlet; wherein the decomposition furnace is provided with a fuel inlet and a raw material inlet; wherein the raw material inlet is connected to the outlet; wherein the decomposition furnace calcines to produce activated kaolin; wherein the calcination temperature in the decomposition furnace is between 700°C and 850°C, the calcination time is between 0 and 1.5 hours, and the calcination atmosphere in the decomposition furnace is an oxygen-rich atmosphere or a CO reduction atmosphere.and a cement calcining unit configured for calcination to produce cement clinker; wherein the activated kaolin is added to the outlet side of the cement calcining unit in a predetermined proportion of the activated kaolin in the cement clinker. It can reduce the use of carbon-containing feedstocks in clinker production, decrease the carbon emissions of the clinker, and adjust the hydration rate of the cement clinker.

This invention discloses a zero-emission synergistic waste heat utilization system and method for sintering ring cooler exhaust gas. The exhaust gas outlets of sections I and II of the ring cooler are connected to the exhaust gas inlet of a waste heat boiler; the exhaust gas outlet of the waste heat boiler is connected to the air inlet of a first circulating fan, and the air outlet of the first circulating fan is divided into two paths, respectively connected to the section I and section II air boxes of the ring cooler, forming a flue gas circulation between sections I and II of the ring cooler; the air inlet of the first cooling fan is connected to the outdoor environment; the air outlet of the first cooling fan is connected to the section V air box of the ring cooler; the exhaust gas outlet of section V of the ring cooler is sequentially connected to the second circulating fan and the section IV air box of the ring cooler; the exhaust gas outlet of section IV of the ring cooler is sequentially connected to the third circulating fan and the section III air box of the ring cooler; the exhaust gas outlet of section III of the ring cooler is connected to the hot air hood of the sintering machine. This invention achieves efficient utilization of high-grade thermal energy.

The invention belongs to the field of iron and steel smelting, and particularly discloses a sintering system and method for flue gas closed cycle. According to the system, an ignition heat preservation furnace and a flue gas cover are sequentially arranged above a sintering machine, an air bellow is arranged below the sintering machine, flue gas generated by sintering can be fed into a high-temperature section of a circular cooler through the air bellow and an exhaust fan to exchange heat with high-temperature materials, and waste gas obtained after heat exchange is conveyed back to the ignition heat preservation furnace and / or the flue gas cover for waste heat utilization. And meanwhile, cold air is introduced into the low-temperature section of the circular cooler through an air blower for heat exchange and then introduced into the medium-temperature section for heat exchange, and finally waste gas of the medium-temperature section is conveyed to an ignition heat preservation furnace and / or a smoke hood for waste heat utilization. Furthermore, the waste gas for waste heat utilization can be introduced into different sintering positions according to the temperature gradient, so that the waste heat utilization is more efficient. According to the system and the method, the utilization rate of the waste heat of the sintering flue gas can be greatly increased, pollution caused by direct exhaust of the flue gas is reduced, and the system and the method have extremely high industrial application value.