129 results about "Cement factory" patented technology

The invention provides a production plan optimization model construction method and system for a cement plant, and the method comprises the steps: obtaining the related data of the cement plant, carrying out the preprocessing, and constructing a photovoltaic power generation power prediction model, a waste heat power generation power prediction model, and an electrical load prediction model according to the processed data; respectively obtaining a cement plant photovoltaic power generation power prediction result, a waste heat power generation power prediction result and an electrical load prediction result through the three prediction models; and constructing a production plan optimization model of the cement plant based on the photovoltaic power generation power prediction result, the waste heat power generation power prediction result and the electrical load prediction result. The cement plant production plan optimization method based on photovoltaic, waste heat and electrical load prediction and monitoring is realized through the model, the clean energy utilization rate of the cement plant can be effectively improved, the production cost is reduced, the production stability is improved, and technical support is provided for realizing green and low-carbon development of the cement industry.

The present invention relates to a method for operating a device for the thermal treatment of mineral substances, wherein the device comprises a preheater 10, a calciner 20 and a furnace 30, wherein the mineral substance is partially introduced into the preheater 10, is conveyed from the preheater 10 into the calciner 20 and from the calciner 20 into the furnace 30, wherein the gas stream of the furnace 30 is guided past the calciner 20, wherein the device comprises an oxygen source 60, wherein an oxygen-rich gas is guided from the oxygen source 60 to the calciner 20, wherein the gas stream is directed from the calciner 20 into the preheater 10, wherein the device comprises a carbon dioxide processing device 70, wherein the carbon dioxide processing device 70 is arranged downstream of the calciner 20, and wherein the device comprises a furnace calciner 21 and a furnace preheater 11.wherein the gas stream from the furnace 30 is directed into the furnace calcinator 21 and from the furnace calcinator 21 into the furnace preheater 11, wherein the mineral material is introduced proportionally into the furnace preheater 11, wherein the solid stream leaving the furnace preheater 11 is divided between the calcinator 20 and the furnace calcinator 21, wherein a load-dependent proportional return of the gas stream leaving the preheater 10 to the oxygen-rich gas between the oxygen source 60 and the calcinator 20 takes place.

The invention belongs to the technical field of geopolymer concrete carbonization production systems, and particularly relates to a geopolymer concrete carbonization production integrated system based on a cascade carbonization principle. According to the invention, through activation and utilization of the building residue soil, cement high-energy-consumption products are reduced, high-temperature flue gas can be reused for carbonization maintenance, carbon dioxide can be utilized for many times based on a gradient carbonization pressure-equalizing principle, self-sufficiency of carbon emission and carbon utilization is realized, the discharge capacity is reduced, and the energy-saving and environment-friendly effects are achieved. The product quality can be improved, the resource utilization rate can be increased, the carbon emission can be reduced, the production process can be optimized, the cost can be reduced, the combination of a traditional cement plant, a concrete mixing plant and a prefabricated component factory can be realized, and an integrated transformation scheme is provided for the carbonization production of geopolymer concrete.

The invention relates to the field of cement plant photovoltaic configuration, in particular to a cement plant photovoltaic configuration method and system considering refined demand response, and the method comprises the steps: taking the minimum value of the sum of the total photovoltaic investment cost of a cement plant and the equipment operation cost in a planning period as an objective function; and constructing a collaborative optimization model by taking power balance and time sequence coupling of interruptible equipment as constraints, and calculating to obtain the optimal configuration of the photovoltaic capacity. The optimal photovoltaic installation capacity is determined by simulating a typical daily operation scene, so that photovoltaic investment waste or reverse increase of online power purchase cost is avoided, and a cooperative scheduling strategy is formulated according to interruptible load characteristics in a production process, so that efficient matching of photovoltaic output and production power consumption load is realized, and the production efficiency is improved. And the process constraint of cement production is not damaged while the optimal economy of the whole life cycle is obtained. In addition, the method fully excavates the demand response potential of the user side, the optimization result is reliable, and the practicability is high.

The invention relates to a high-efficiency composite cement plant fire coal accelerator and a preparation method thereof, and belongs to the technical field of clean combustion technology and catalysts, the high-efficiency composite cement plant fire coal accelerator comprises the following raw materials by mass: 30-45% of a nano metal oxide catalyst, 20-30% of a modified sulfur-fixing agent, 10-20% of an auxiliary agent, and the balance of water. The mass fraction of the transition metal salt combustion improver is 15%-25%, the mass fraction of the dispersion-stabilizer is 8%-12%, and the mass fraction of the rare earth synergist is 5%-10%. According to the high-efficiency composite cement plant fire coal accelerant and the preparation method thereof, through cooperation of the nano metal oxide catalyst, the modified sulfur-fixing agent, the transition metal salt combustion improver, the dispersion-stabilizer and the rare earth synergist, coal combustion can be promoted to achieve the coal saving effect, emission of harmful pollutants is reduced from the source, and environmental pollution is reduced. Remarkable economic benefits and environmental benefits are brought to a cement plant, and the modified sulfur-fixing agent enhances chemical adsorption with sulfur through the hydrophobic characteristic and achieves the effect that the sulfur-fixing rate is doubled through the oxidation catalysis effect of transition metal salt.

The invention discloses a cement plant coal taking grab bucket skew detection method, which relates to the technical field of visual inspection, and comprises the following steps: S1, obtaining material distribution information of a grab bucket operation area; s2, based on the material distribution information, a grab bucket is controlled to align at the highest point of the materials to descend to grab the materials; s3, acquiring a grab bucket working video, and performing distortion correction on each frame of image of the grab bucket video; s4, inputting the corrected grab bucket video into the target detection model to obtain the rotation angle of the grab bucket platform; s5, according to the current working stage of the grab bucket, whether the rotation angle of the grab bucket platform exceeds a preset threshold value of the corresponding stage or not is judged, and if yes, alarm information is pushed. Materials are scanned through the radar level gage, the grab bucket is guided to be aligned to the highest point, charge level interference is eliminated, and pixel-level distortion correction is conducted on the image based on internal parameters of a camera; and angle calculation is not influenced by lens distortion, so that the output skew angle truly reflects the mechanical state of the equipment, the false alarm rate is greatly reduced, and a reliable data basis is provided for accurate diagnosis.

The utility model relates to the technical field of cement plant kilns, and provides a biomass fuel auxiliary scattering and discharging device which comprises a hopper and a frame, a driving piece is arranged on the outer surface of the hopper, and the inner wall of the hopper is rotationally connected with a first scattering roller, a second scattering roller and a third scattering roller. Linkage pieces are arranged among the first scattering roller, the second scattering roller and the third scattering roller, and scattering cutters are fixedly connected to the surfaces of the first scattering roller, the second scattering roller and the third scattering roller. After the biofuel enters the hopper, a motor drives a first scattering roller to rotate through a speed reducer, a first synchronous wheel drives a second synchronous wheel and a second scattering roller to rotate through a first synchronous belt, and the first synchronous wheel drives a third synchronous wheel and a third scattering roller to rotate through a second synchronous belt, so that a scattering cutter rotates; and in addition, a vibration motor is combined, so that when the hopper is vibrated, the biofuel is convenient to discharge.

The invention belongs to the technical field of metallurgical slag resource utilization, and particularly relates to a nickel smelting slag recycling process. Comprising the following steps: mixing and drying stainless steel pickling sludge, Bayer process red mud and coke powder to prepare iron-containing coke powder; setting a slag pot position and a spray gun position; when the molten nickel smelting slag falls down, iron-containing coke powder is sprayed out at a constant speed through argon by using a spray gun, the molten nickel smelting slag is blown away, and then a reduction reaction is carried out; a fluxing agent is added into the reduced molten nickel smelting slag, then vacuumizing is conducted, magnesium is reduced and evaporated, magnesium steam is collected and cooled, and elementary substance magnesium and magnesium-removed molten nickel smelting slag are obtained; coke powder and metal carbide powder are added into the magnesium-removed molten nickel smelting slag, cooling is conducted after reaction, reaction materials are taken to be crushed, ground and magnetically separated, Fe-Ni-Cr enriched alloy is obtained and used for a steel plant, remaining materials are used as aggregate in a cement plant, the production process is simple, the recovery process is short, energy consumption of equipment can be greatly reduced, and the metal recovery rate is increased.

Methods are provided herein comprising: a) calcining limestone in a cement plant to form carbon dioxide and a calcium compound selected from calcium oxide, calcium hydroxide, or combinations thereof; b) treating the calcium compound with N-containing salt in water to produce an aqueous solution comprising calcium salt and N-containing salt; and c) contacting the aqueous solution with carbon dioxide under one or more precipitation conditions to produce a precipitate comprising calcium carbonate and a supernatant aqueous solution wherein the calcium carbonate comprises vaterite.

The invention discloses a novel bypass ventilation dechlorination system and method for a cement plant, and the system comprises a bypass ventilation pipeline connected with a smoke chamber, the other end of the bypass ventilation pipeline is connected with a settling chamber, the other end of the settling chamber is connected with a separated heat pipe heat exchanger, and a gate plate is arranged between the settling chamber and the separated heat pipe heat exchanger. The bottom of the separated heat pipe exchanger is connected with the pneumatic conveying system; one end, far away from the settling chamber, of the separated heat pipe exchanger is connected with the decomposing furnace; the separation type heat pipe heat exchanger comprises a condensation section, a first evaporation section and a second evaporation section, according to the invention, the temperature of the flue gas without harmful components is about 850-950 DEG C, a proper amount of pulverized coal is sprayed through the combustor to generate a reduction zone, NOx in the flue gas is reduced into N2, the consumption of SNCR ammonia water of a sintering system can be reduced, and the problem of NOx emission of bypass flue gas is solved; the flue gas with the temperature of 850-950 DEG C enters the decomposing furnace and is equivalent to the temperature in the decomposing furnace, so that the influence on a cement sintering system is very small; and crusts are reduced by adopting a separated heat pipe heat exchanger.

The invention relates to the technical field of model predictive control, and provides a decomposing furnace outlet temperature model predictive control method comprising the following steps: S1, carrying out data standardization preprocessing on a cement plant data set; s2, performing principal component analysis processing on the preprocessed cement plant data, and reducing the number of obtained observation variables from K to F; s3, training a width learning network model, if the verified R2 decision coefficient is greater than a preset value, keeping the trained width learning network model and then ending training, otherwise, training by using an incremental learning algorithm; s4, taking the predicted output of the model as a predicted value of the outlet temperature of the decomposition furnace in the future, and constructing a model prediction control MPC optimization problem; s5, solving a model predictive control MPC optimization problem by adopting a rolling optimization strategy; and S6, inputting the optimal control quantity into an actual control system of the decomposing furnace, executing corresponding adjustment operation, and obtaining newest observation data again at the next sampling moment. And a reliable technical support is provided for daily operation regulation and control and production decision making of a cement plant.

The utility model discloses a cement plant production water treatment device which comprises a treatment box, a discharging pipe is arranged at the bottom of the treatment box, a discharging valve is arranged on the discharging pipe, the discharging valve comprises a plug, a discharging block is arranged on the discharging pipe, a discharging rod is arranged on the discharging block in a sliding mode, the plug is arranged on the discharging rod, and the plug is arranged on the discharging rod. A rotating shaft is rotationally arranged between the discharging pipe and the discharging block, a rotating block is fixedly arranged on the rotating shaft, a rotating groove matched with the rotating block is formed in the discharging rod, a discharging spring is arranged between the discharging block and the plug, the discharging rod and the plug are conveniently driven to move through rotation of the rotating shaft and the rotating block, and the discharging pipe is opened for water drainage after the plug moves; and after the rotating shaft is reversely rotated, the plug resets under the elastic force action of the discharging spring, the discharging pipe is blocked, water leakage is prevented, and operation is easy and convenient.

Providing an implementable renewable fuel gas plant processes with management of greenhouse gases with minimal changes to existing plant set ups is a technical challenge to be addressed. Embodiments herein provide a system for renewable fuel gas generation and utilization in industrial plants with carbon dioxide as heat carrier. The system design integrates renewable fuel gas (H2) which is generated within the system and utilized to meet the thermal energy requirements of the production process. CO2 produced as byproduct of calcination in a process equipment, such as during calcination in cement plant is used as a heat-transferring medium to heat the H2. Further, the system provides recycling of the generated byproducts by separating the exhaust gases, comprised of CO2 and H2O. The H2O is recycled to generate H2 via electrolysis. The separated CO2 again serves as a heat-transferring medium, while the excess CO2 is sequestrated.

The invention relates to an integrated energy management system of a cement plant, in particular to an algorithm for optimizing a factory production plan by predicting and monitoring photovoltaic, energy storage, waste heat power generation and electrical load in the cement plant. The algorithm comprises a data collection unit, and the data collection unit is used for collecting all data needed by the algorithm; the data processing unit is used for processing abnormal values and missing values in the data collection unit; the prediction and monitoring unit comprises a photovoltaic power generation prediction module, a waste heat recovery monitoring module and an electrical load prediction module, the photovoltaic power generation prediction module is used for predicting photovoltaic power generation capacity, the waste heat recovery monitoring module is used for determining recovery potential and efficiency of waste heat, and the electrical load prediction module is used for predicting future electrical load; the production optimization unit adopts a target optimization model to achieve the purposes of energy cost minimization, environmental influence minimization and production efficiency maximization; according to the algorithm, fine management of energy consumption of the cement plant can be realized, the energy utilization efficiency is improved, and the production cost is reduced.

The utility model provides a dust removal device for a factory easy to raise dust, belongs to the technical field of dust removal of cement plants, and aims to solve the problems that the existing dust removal device for the factory easy to raise dust has high kinetic energy consumption and high cost although the dust removal effect of a dust remover and pulse dust removal is good, and the dust removal effect is limited although a reverse blowing mode is low in cost and mild in dust removal. Comprising a dedusting body; the dust collection box is fixedly mounted at the bottom of the dust removal machine body; the separation mounting plate is fixedly mounted in the dust removal machine body; a plurality of groups of filter bags are arranged, and the plurality of groups of filter bags are mounted in the partition mounting plate; the driving plate is arranged in the dust removal machine body; the driving motor is in bolted connection with the top of the separation mounting plate; the dust removal assembly is arranged in the dust removal machine body; and the ash removal assembly is arranged in the dust removal machine body. The device has the advantages of avoiding back suction, reducing blockage, efficiently removing dust and the like.

The invention discloses a normal-temperature curing self-cleaning ash-resistant oil-stain-resistant high-light-transmittance super-hydrophobic nano coating and a preparation method thereof. The method comprises the following steps: mixing a nano silicon dioxide dispersion, a nano tin oxide quantum dot dispersion, an acid catalyst and a solvent to obtain a first mixed solution; dropwise adding a mixture containing siloxane dimer, fluorosilane and a solvent into the first mixed solution, and continuing to react after dropwise adding to obtain a primary material; the primary material is subjected to aging treatment. The hydrophobic angle of the coating is larger than 120 degrees, the light transmittance increment is larger than 2%, the resistivity is 108-109, the coating has excellent stain resistance, antistatic performance, dust resistance and corrosion resistance, the efficiency of an original power station is improved by 40% or above, and the coating has a good application prospect. The continuous and efficient power generation capacity of a distributed photovoltaic power station under high-corrosion and high-dust environment conditions such as a steel plant, a cement plant and an aluminum plant is effectively achieved, and the method has a good application prospect.

The utility model relates to the technical field of central control self-starting of diesel generators, and discloses a central control self-starting system of an emergency diesel generator applied to a cement factory. The central control self-starting system comprises an electrical room dual-power emergency cabinet, an electrical room DCS cabinet, a central control room host computer, a master substation DCS cabinet, a master substation diesel generator and a master substation diesel generator low-voltage cabinet, and one end of the electrical room dual-power emergency cabinet is connected with factory equipment; one end of the electrical room DCS cabinet is connected with the other end of the electrical room dual-power emergency cabinet; one end of the central control room host computer is connected with the other end of the electrical room DCS cabinet; one end of the master substation DCS cabinet is connected with the other end of the central control room host computer; one end of the total substation diesel generator is connected with the other end of the total substation DCS cabinet; one end of the total substation diesel generator low-voltage cabinet is connected with the other end of the total substation diesel generator, and the other end of the total substation diesel generator low-voltage cabinet is connected with factory equipment.

The utility model relates to the technical field of magnetic suspension centrifugal blowers, and discloses a magnetic suspension centrifugal blower based on a desulfurization oxidation air system, which comprises a shell, the air blower body is installed in the shell, and an air inlet matched with the air blower body for use is formed in the shell; the dustproof system is mounted on the shell and comprises a mounting frame, the mounting frame is detachably mounted on the shell, and the mounting frame is located at the air inlet; and the filtering part is arranged in the mounting frame through the fastening piece and the mounting piece. According to the dust-proof fan, the dust-proof system and the multi-stage filtering part are arranged, so that a large amount of dust and particulate matters generated in a dusty and high-humidity environment in a cement plant are effectively prevented from entering the fan, and the problems that the efficiency is reduced and the energy consumption is increased due to the fact that the dust blocks an air channel or is attached to an impeller are obviously reduced; and meanwhile, the maintenance frequency and cost are reduced, and stable operation and long service life of the fan in a severe environment are ensured.

The invention discloses automatic mold removal equipment for cement strength detection, and relates to the technical field of cement production, the automatic mold removal equipment comprises a support, a carrying assembly, a transfer assembly, a mold removal assembly, a mold removal assembly and an electric cabinet; the carrying assembly is mounted at the top of the support and used for carrying the cement molds to different stations for mold removal. The transfer assembly is installed at one end of the support and used for positioning the cement mold and making preparations for carrying. The mold removing assembly is installed in the middle of the support and used for removing the mold of the cement mold. According to the equipment, through cooperative work of the carrying assembly, the transfer assembly, the mold removal assembly and the mold removal assembly, automation of the whole process of carrying, mold removal and mold removal of the cement mold is achieved, the working efficiency is remarkably improved, compared with a traditional manual mold removal mode, manual intervention is reduced through automatic operation, the single-batch mold removal time is shortened, and the labor intensity of workers is relieved. The device is especially suitable for high-frequency detection requirements of large cement plants.

The invention discloses an N-k fault operation-oriented cement plant energy system safety improvement method and device, and the method comprises the steps: collecting data through an intelligent electric meter, constructing a state vector, obtaining a core variable estimation value through filtering, generating a heat energy system adjustable boundary parameter through the combination of heat capacity-heat conduction coupling modeling, and carrying out the N-k fault operation-oriented cement plant energy system safety improvement. Evaluating the safety margin of the system by means of an N-k fault model; a state vector containing an N-k scene is generated based on the evaluation result and the state vector, a thermal-electric load safety optimization model is constructed and solved, and an equipment adjustment instruction and a cement plant flexible adjustment power value are obtained; presetting a working procedure annual start-stop threshold value and monitoring operation time to generate a service life constraint; and finally, a process-level scheduling optimization model is constructed and solved based on the flexible adjustment power value, and a process operation instruction is obtained. The problems that an existing cement plant energy system and production load cooperation is insufficient, and the utilization efficiency of the multi-energy redundancy capacity under the fault scene is low are solved.

This invention discloses a carbon-fixing brick and its preparation process, comprising the following components in the following proportions: Huaxin-cement (P·O 42.5) 16%-21%, Huatailong-tailings 30%-35%, Huaxin-stone powder 27%-32%, quicklime 0%-5%, and water 18%-23%. The carbon-fixing brick formed by these components solves the problems of insufficient raw material compatibility and carbon fixation rate in Tibet. It directly introduces cement plant flue gas into the carbon curing chamber, achieving carbon fixation and curing under "normal temperature (20-30℃), relative humidity 45%-55%" conditions, forming a closed-loop system of "cement plant carbon emissions - carbon-fixing brick preparation," achieving an emission reduction target of over 5%. It also enables "direct utilization" of cement plant carbon emissions, reducing the transportation and storage costs of CCS, and reducing local cement plant carbon emissions by 5%-7%, exceeding the 5% emission reduction target.

This invention relates to the field of photovoltaic (PV) configuration in cement plants, specifically a method and system for PV configuration in cement plants that considers refined demand response. The method includes: using the minimum sum of the total PV investment cost and the equipment operating cost within the planning period as the objective function, and constrained by power balance and the time-series coupling of interruptible equipment, constructing a collaborative optimization model to calculate the optimal PV capacity configuration. The optimal PV installation capacity is determined by simulating typical daily operating scenarios, thereby avoiding wasted PV investment or increased grid-purchased electricity costs. Furthermore, a collaborative scheduling strategy is formulated based on the characteristics of interruptible loads in the production process, achieving efficient matching between PV output and production power load. This achieves optimal economic performance throughout the entire lifecycle without disrupting the process constraints of cement production. In addition, the proposed method fully explores the demand response potential on the user side, and its optimization results are reliable and highly practical.

The present invention relates to a method for decarbonating a method for operating a device for the thermal treatment of a mineral material, wherein the device comprises a preheater 10, a calciner 20 and a furnace 30, wherein the mineral material is transferred into the preheater 10, from the preheater 10 into the calciner 20 and from the calciner 20 into the furnace 30, wherein the gas stream after the thermal treatment is fed to a first carbon dioxide separation device 60, characterized in that the device comprises a second carbon dioxide separation device 70, wherein the gas stream is directed from the first carbon dioxide separation device 60 to the second carbon dioxide separation device 70, wherein a bypass material and / or a filter material is used as the carbon dioxide sorbent in the second carbon dioxide separation device 70.

1. Name of the product in this design: CO2 two-phase absorbent phase separation point detector. 2. Purpose of this design: To determine the phase separation point of the two-phase absorber after absorbing CO₂ by using infrared detection to capture CO₂ and trigger the liquid-liquid phase transition mechanism. Application areas and locations: Used for capacity monitoring of two-phase absorbents for capturing CO₂ in flue gas in coal-fired power plants, steel plants, and cement plants. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

1. The name of the design product: sunshade (AQ LOGIC series). 2. The use of the design product: The product is mainly used to protect the faceplate of the electric actuator matched with the valve, to avoid discoloration and aging due to long-term ultraviolet radiation, and is suitable for power plants, nuclear power plants, cement plants, chemical fiber plants, seawater desalination, ships and oil and gas, and all scenes involving pipeline medium flow control and on-off control. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

A method of processing exhaust gas from a cement plant, the cement plant including one or several raw meal mills for milling a cement raw meal, one or several preheater strings, each having a plurality of preheater stages, and a rotary kiln, wherein the one or several preheater strings are for preheating the cement raw meal in counter-current flow with an exhaust gas from the rotary kiln. The method includes extracting the exhaust gas from a second highest or highest stage of at least one of the preheater string(s), cooling the exhaust gas to a temperature of <250° C., dedusting the exhaust gas, introducing the cooled and dedusted exhaust gas into a carbon capture installation, in which CO2 is separated from the exhaust gas for obtaining a CO2 lean gas, wherein the exhaust gas, when being introduced into the carbon capture installation, has a CO2-content of >25 vol.-%.

The utility model relates to the field of plant area sweeping, and discloses a cement plant area medicament adding area sweeping system which comprises a sweeping device, supporting rollers are symmetrically arranged on the edge of one side of the sweeping device, a supporting holding rod is fixedly installed on one side of the upper surface of the sweeping device, and guide supporting rods are symmetrically welded to the two sides of the inner wall of the sweeping device. A movable support is movably installed on the outer surface of the guide supporting rod in the sweeping device, the bottom end of the movable support extends to the position below the sweeping device to be provided with a sweeping brush head, a fixed sliding groove is formed in one side of the inner wall of the sweeping device, and the middle of one side of the movable support penetrates through the fixed sliding groove to be fixedly connected with a connector. According to the cleaning device, the cleaning brush head is adjusted to reciprocate along the lower portion of the cleaning device, so that the effect of conveniently cleaning the drug crystals in the drug adding area is achieved, the cleanliness of the road surface in the drug adding area is improved, the problem that the drug crystals are bonded to the road surface and are inconvenient to clean is solved, and the overall cleaning efficiency of the drug crystals is improved.

The utility model provides an auxiliary biomass fuel feeding device for a cement plant, and relates to the technical field of feeding devices, the auxiliary biomass fuel feeding device comprises a hopper, a rotating shaft, auger blades, a first motor and a screw conveyor, the hopper is installed above the screw conveyor, and a discharging port is transversely formed in the middle of the bottom of the hopper and connected with a feeding port of the screw conveyor; the rotating shafts are evenly installed in the hopper and perpendicular to the discharging port, the auger blades are installed on the rotating shafts, the first motor is installed on the side wall of the hopper, and the power output end of the first motor is connected with the power input ends of the rotating shafts. And arching is easy to occur in the stock bin, and no material is fed.

This utility model provides a grinding aid dosing device for cement plants, belonging to the technical field of grinding aid dosing equipment. It includes a liquid outlet pipe at the liquid outlet end of a storage tank, a grinding aid pump mounted on the liquid outlet pipe, a supply pipe connected to the liquid outlet end of the grinding aid pump, a stirring motor at the top of the storage tank, a stirring shaft connected to the stirring motor inside the storage tank, a connecting ring at the upper part of the stirring shaft, a connecting rod at one end of the connecting ring, a cleaning component at the bottom of the connecting rod, and a buffer tank between the grinding aid pump and the storage tank. This utility model uses the stirring motor to drive the stirring shaft to rotate, which in turn causes the connecting ring to drive the cleaning component to rotate. The cleaning component, through the rotation of the cleaning roller and cleaning plate, simultaneously stirs the grinding aid and removes residual grinding aid liquid from the inner wall of the storage tank, preventing excessive accumulation of residual grinding aid liquid on the inner wall of the storage tank and ensuring stable quality of subsequent grinding aid preparation.

The invention discloses a method for producing alumina clinker by using a cement clinker calcining kiln, which comprises the following steps: feeding a raw material for extracting alumina from fly ash by using a limestone sintering method into the cement clinker calcining kiln for sintering so as to produce the alumina clinker; in the cement clinker calcining kiln, the gradient of a fixed bed of a grate cooler blanking chamber is 13-17 degrees; a plurality of air cannons are arranged at the bottom of the grate cooler discharging chamber, and a movable pushing device is arranged at the head end of the grate cooler discharging chamber. The sintering temperature is 1300 DEG C to 1400 DEG C; the sintering time is 20 to 40 minutes; a sintering system is in a reducing atmosphere, and the content of carbon monoxide in a smoke chamber at the tail of the rotary kiln is larger than or equal to 8500 MMP. The cement plant clinker kiln is used for sintering the alumina clinker, the application range of the cement plant clinker kiln is further expanded, and the utilization efficiency of the cement plant clinker kiln is improved. Under the practical conditions that the cement market is increasingly shrunk and the cement production line is low in operation efficiency, the efficiency of the cement production line is fully exerted, and the process investment for producing aluminum oxide by a limestone sintering method is reduced.