424results about "Lime production" patented technology

The invention relates to the technical field of lime kiln control, and discloses a lime kiln partition intelligent temperature control system and a storage medium, and the system comprises a data collection unit which is used for collecting state data of each region of a lime kiln; the working condition recognition unit recognizes working conditions based on the state data; the temperature control unit is provided with a PID (Proportion Integration Differentiation) control strategy and a prediction control strategy, and the opening degrees of the fuel regulating valves and the air regulating valves in different areas in the lime kiln are calculated according to the corresponding control strategies selected on the basis of working conditions; the discharging control unit is provided with a balance control strategy, the balance control strategy obtains the current discharging speed through the current productivity of the lime kiln and the material level height in the lime kiln, and the execution unit correspondingly controls the lime kiln according to the control quantity. The method effectively solves the problems of difficulty in multi-area coordination, poor working condition adaptability, high energy consumption and the like in a traditional control mode, and has the remarkable advantages of improving the temperature control precision, ensuring the production stability and reducing the energy consumption.

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

The invention belongs to the technical field of intelligent measurement and control of kilns, and particularly relates to a kiln control system based on a lime sleeve kiln, which realizes space-time alignment of an airflow velocity vector field, a temperature gradient field and a dynamic material distribution field by constructing a three-dimensional dynamic grid topology of a countercurrent calcining zone in real time. The method comprises the following steps: accurately predicting a material migration path in a preset time window and an airflow critical speed required for realizing suspension under the condition of predicting evolution particle size at each path node, and quantifying the matching degree of the current opening degree of an axial air door group in a countercurrent calcining zone to the suspension efficiency of the material based on the actual airflow speed of the material and a critical value deviation; when it is judged that the matching degree does not reach the standard, an accurate air door regulation and control instruction is generated based on abnormal node space distribution, a servo mechanism is driven to execute and trigger closed-loop feedback, suspension requirement dynamic coupling of current and future short-time-sequence materials is achieved, a traditional lag regulation and control mode is broken through, and the calcination efficiency and the energy consumption control level of the lime sleeve kiln are remarkably improved.

The utility model discloses a limestone milk grinding device, which relates to the technical field of limestone milk, and comprises a shell, the left part of the top end of the shell is fixedly connected with a feed hopper, the right part of the top end of the shell is fixedly connected with a water inlet pipe, and the bottom end of the shell is fixedly provided with a first electromagnetic valve; and the bottom end of the first electromagnetic valve is fixedly connected with a discharging pipe, and a grinding structure is fixedly installed in the middle of the top end of the shell. According to the limestone milk grinding device disclosed by the utility model, under the action of the grinding structure, the first motor is used for driving the transmission rod to rotate, so that the grinding roller and the brush roller are driven to rotate synchronously, and limestone milk raw materials are ground under the matching action of the grinding roller and the grinding disc; the ground limestone powder penetrates through the grinding disc and falls onto the surface of the filter screen, and in the process, the brush roller rotates to clean the surface of the grinding disc, so that the situation that part of particles block small holes in the surface of the grinding roller, and consequently discharging of the limestone powder is affected is avoided.

The invention relates to the technical field of rotary kiln processes, and provides a method for reducing nodulation in a lime rotary kiln, which comprises the following steps: S1, raw material pretreatment; s2, controlling the environment in the kiln; s3, optimizing the structural design of the kiln body; and S4, cleaning and maintaining in the kiln. According to the technical scheme, through the process steps of proportioning the raw materials, calculating the calcining temperature in a kiln, adjusting the stockline of a cooler to be 1.5 m, starting to discharge ash, and ending when the stockline of the cooler is 0.5 m, the CaO range of block ash is reduced by 11.44%, the SiO2 range is reduced by 1.52%, the activity range is reduced by 94.88 ml, the CaO range of surface ash is reduced by 6.95%, the SiO2 range is reduced by 0.54%, and the activity range is reduced by 100 ml; the data verifies that the quality of the finished product ash subjected to multi-fuel combustion in the rotary kiln is relatively stable after the new method is adopted.

The utility model discloses a carbon-rich lime kiln production system which comprises a kiln body and a kiln cavity, the kiln cavity comprises a calcining chamber, a carbon cooling chamber, a water cooling chamber and an oxygen cooling chamber which are sequentially connected in series from top to bottom; a carbon dioxide injection mechanism is arranged at the lower part of the carbon cooling chamber; a water vapor injection mechanism is arranged at the lower part of the water cooling chamber; and an oxygen injection mechanism is arranged at the lower part of the oxygen cooling chamber. A single air or carbon dioxide cooling structure independently adopted by a traditional lime kiln cooling section is replaced with a multi-medium multi-stage cooling structure, CO2 enrichment is achieved, meanwhile, the lime cooling effect can be guaranteed and improved, and the quality of lime products is guaranteed; and the difficulty of capturing and recycling the carbon dioxide in the subsequent lime kiln flue gas can be greatly reduced. The device has the advantages of simple structure, easiness in operation, flexibility in adjustment, low investment cost and the like, and realizes effective compatibility of good carbon enrichment effect and good lime product quality.

The utility model relates to the technical field of double-chamber kilns, and in particular to a double-chamber kiln channel refractory brick anti-falling structure, including a floor and a wall, the surface of the floor is fixedly connected to the two ends of the wall, the outer wall of the wall is provided with fireproof bricks, the gap between the two fireproof bricks is matched, and the outer walls of the two fireproof bricks are fitted. The threaded column in the anti-falling structure is inserted into the interior of the sleeve, and then the staff turns the handle, the handle drives the threaded column to rotate, the threaded column is turned to the interior of the sleeve, the threaded column drives the disc to move, the disc and the connecting plate are tightly fitted together, the connection and the curved plate are fixed with the surface of the fireproof brick to prevent the fireproof brick from falling off, the wall and the fireproof brick form a double-chamber kiln channel. The anti-falling structure is set. When the refractory bricks inside the double-chamber kiln channel are prevented from falling off, the fireproof bricks are supported by the curved plate and the connecting plate, and the fireproof bricks will not be suspended in the air, thereby improving the use effect of the anti-falling structure.

The invention relates to the technical field of lime manufacturing, and provides a process and a system for manufacturing high-purity lime. The process comprises the steps of raw material pretreatment, plasma surface pretreatment, segmented atmosphere calcination, sound wave reinforced mass transfer, heat energy comprehensive utilization and intelligent control, rapid cooling, flue gas treatment and finished product packaging. The system comprises a raw material pretreatment unit, a plasma surface pretreatment unit, a multi-section gradient atmosphere calcining kiln, a sound wave reinforced mass transfer system, a heat energy comprehensive utilization and intelligent control system, a carbon dioxide capturing and recycling unit and a finished product cooling and packaging unit. Through raw material deep purification, surface activation treatment, gradient calcination and atmosphere accurate control, sound wave mass transfer reinforcement, intelligent optimization regulation and control, rapid cooling and flue gas purification and resource recovery, the purity and the reaction activity of a calcium oxide product are synergistically improved, and the production energy consumption and pollutant emission are remarkably reduced; and high-efficiency, clean and resource production of the high-purity lime is realized.

Equipment for crushing and grading magnesium oxide comprises a composite grading machine, a striking crushing and stripping machine, a spiral feeding machine, a circulating fan, a cyclone separator, a bag-type dust collector and an air compressor, and is characterized in that a crushing and grading unit is upgraded and grafted on the magnesium oxide crushing and grading equipment by utilizing the air flow advantage of closed-loop circulating air; on the basis of ensuring that the content of MgO is not reduced due to the influence of moisture and CO2 in air in the crushing and grading process, heavy MgCO3 fine powder and coarse MgO powder in raw powder are separated and graded to the maximum extent, and a low-grade magnesium oxide product containing a small amount of MgCO3 is obtained through an outlet of a 1 # air-lock valve of a composite grading machine; a high-grade magnesium oxide fine powder main product is obtained through an outlet of a second air-lock valve of the cyclone separator, and a high-grade magnesium oxide superfine powder product is obtained through an outlet of a third air-lock valve of the bag-type dust collector. By adopting a simple mode of coarse particle stripping shell shrinkage crushing instead of coarse particle grinding, the non-calcined magnesite powder is prevented from entering the fine powder, and the amount of the magnesium oxide fine powder is also increased. Operation is simple and easy to control, productivity efficiency is high, production is safe and environmentally friendly, and market application prospects are wide.

The present invention discloses an alkali-resistant castable for a lime rotary kiln working lining, as well as its preparation method and application. The present invention comprises the following raw materials in parts by mass: 100 parts premixed granular material; 50-55 parts premixed fine powder; and 9-13 parts potassium dihydrogen phosphate solution. The premixed granular material comprises magnesia aluminate spinel particles and calcium hexaaluminate particles; and the premixed fine powder comprises magnesia rhodonite fine powder, enstatite fine powder, zirconium boride fine powder, and amorphous Al2O3 fine powder. The alkali-resistant castable for the lime rotary kiln working lining prepared by the present invention has excellent construction performance. After being cast into the lime rotary kiln working lining, it does not require additional heat treatment or firing, thus saving energy. The castable has high high-temperature strength, low bulk density, low thermal conductivity, high alkalinity, strong resistance to alkali corrosion, and is non-ringing and slag-resistant. The castable has good fluidity, ensuring good overall sealing of the lime rotary kiln working lining. The alkali-resistant castable produces no toxic components before and after construction, making it environmentally friendly.

The utility model relates to a pulverized coal and coal gas co-combustion device for a Merz double-chamber lime kiln, and belongs to the technical field of lime calcination equipment in the metallurgical industry. According to the technical scheme, the device comprises a coal gas access pipe (1), a pulverized coal access pipe (2), a spray gun flange (3), a double-pipeline parallel combined spray gun pipe (4), a kiln shell (9) and an elbow (10), the coal gas access pipe (1) and the pulverized coal access pipe (2) are fixed to the kiln shell (9) through the spray gun flange (3), and the coal gas access pipe (1) and the pulverized coal access pipe (2) are transversely arranged up and down; the double-pipeline parallel combined spray gun pipe (4) consists of two pipelines which are vertically arranged in parallel, the upper ends of the two pipelines are respectively connected with the coal gas access pipe (1) and the pulverized coal access pipe (2) through an elbow (10), the lower ends of the two pipelines extend into a kiln to form a spray gun opening, and a cavity between the two pipelines is filled with a wear-resistant material. The pulverized coal and coal gas dual-fuel combustion device has the advantage that the purpose of pulverized coal and coal gas dual-fuel combustion is achieved.

The invention belongs to the technical field of lime shaft kilns, and particularly discloses a double-hearth type lime shaft kiln which is characterized in that a calcining zone is connected to the lower portion of a preheating zone, a cooling zone is connected to the lower portion of the calcining zone, a discharging barrel is connected to the lower portion of the cooling zone, a discharging frame is connected to the lower portion of the discharging barrel, and a discharging mechanism is arranged in the discharging barrel; an air locking mechanism is arranged in the discharging frame. The discharging mechanism is arranged, four discharging holes of a center plate are matched with a sealing plate, materials fall from the center to the periphery in a dispersed mode, material segregation caused by single-channel discharging is avoided, the air locking mechanism is tightly attached to a conical discharging groove through a sealing plate, and a movable plate and the sealing plate are in linkage sealing, so that the discharging efficiency is improved. The external cold air is effectively prevented from flowing backwards and hot air in the kiln is effectively prevented from leaking, zero-time-difference synchronous actions of blanking hole opening, air locking releasing, blanking hole closing and air locking starting are achieved through linkage control of the blanking mechanism and the air locking mechanism, and the air leakage problem caused by delay of a traditional control system is avoided.

The lime kiln lining structure comprises a kiln top lining and a kiln body lining, and the kiln body lining comprises a first refractory brick layer, a second refractory brick layer, a first heat insulation layer, a second heat insulation layer and a third heat insulation layer which are sequentially arranged from inside to outside. Contact surfaces between two adjacent bricks in the first refractory brick layer are in concave-convex fit and are in sealed connection; the strength of the kiln top lining is higher than that of the first refractory brick layer, the second refractory brick layer, the first heat insulation layer, the second heat insulation layer and the third heat insulation layer, and the kiln top lining extends downwards to form a reinforcing part; kiln protecting plates are arranged on the inner side face of the kiln top lining and the upper side surface of the side, away from the second refractory brick layer, of the first refractory brick layer. The stability of the lime kiln lining can be enhanced, and the service life of the lime kiln can be prolonged; meanwhile, the heat preservation performance of the lime kiln can be enhanced, and heat loss is reduced.

The invention provides a method for establishing a metallurgical lime burning reduction model and a method for establishing a calcium-magnesium-silicon content model in metallurgical lime, and further provides application of the method for establishing the models. The establishment method of the model provided by the invention comprises the following steps: preparing a series of standard samples of which the ignition loss and the content of each component have a proper gradient range, directly melting and flaking, weighing the mass of the molten flaking, and carrying out fitting regression on the loss amount of the sample before and after melting and a standard ignition loss value, so as to establish an ignition loss correction model; after dilution ratio correction is carried out on the measured value of each component, iterative regression calculation is carried out on the measured value and the burning loss, and a basic effect correction model caused by the burning loss is established; therefore, a model for rapidly determining the burning loss of the metallurgical lime and the contents of chemical components such as calcium oxide, magnesium oxide and silicon dioxide by using the fuse piece weighing correction-X-ray fluorescence spectrometry is established, and accurate determination of the burning loss of the metallurgical lime and the contents of the calcium oxide, the magnesium oxide and the silicon dioxide can be realized.

The invention provides a low-nitrogen combustion decomposing furnace and a lime calcining system, and belongs to the technical field of limestone calcining, specifically, the low-nitrogen combustion decomposing furnace comprises a decomposing furnace body used for calcining and decomposing limestone, and a furnace chamber of the decomposing furnace body is divided into a material collecting area, a hot carbon reduction area and a combustion decomposing area; materials, combustion-supporting gas and fuel enter the decomposing furnace body in two ways, and the proportion of the materials, the combustion-supporting gas and the fuel entering the decomposing furnace body in the two ways is controlled, so that a hot carbon reduction area and a combustion decomposing area are formed in a furnace cavity of the decomposing furnace body. For example, the proportion of combustion-supporting gas in the combustion decomposition area is more, so that materials can be fully combusted, while the proportion of the combustion-supporting gas in the hot carbon reduction area can be reduced, so that insufficient combustion is carried out in the area, and meanwhile, suppression and reduction are carried out through fuel, so that nitrogen oxide passing through the area is subjected to reduction reaction to become carbon dioxide and nitrogen to be discharged; the content of nitrogen oxide is greatly reduced, and the nitrogen oxide treatment procedure of the subsequent exhaust process is reduced.

The invention discloses a simple and practical slide sieve, and relates to the technical field of refractory material manufacturing. The simple and practical slide sieve comprises a slide carriage shell, a sieving assembly is arranged in the slide carriage shell, an overhauling assembly is arranged on one side of the slide carriage shell, the sieving assembly comprises a sieve arranged in the slide carriage shell, and lifting lugs are fixedly installed on the two sides of the sieve. The screening problem is solved by the self-gravity of the arranged screening assembly in the using process, only the low-power bin wall vibrator is periodically used for vibration, the cost is remarkably saved, the size is small, the weight is light, installation and maintenance are convenient, the structure is simple, multiple inspection holes are formed in the top of the slide sieve, the sieve net is convenient to overhaul and replace, and sampling and testing are convenient; the vibrating screen device replaces traditional vibrating screen equipment, is obvious in using effect especially in occasions for treating and screening lime or making sand and other fine powder materials, meanwhile, is small in installation space occupied area and light in weight, and can still achieve the screening function under the condition that the space layout is compact.

The present invention discloses a method for constructing a refractory material structure of a lining support pillar of a double-chamber kiln, including constructing a refractory material structure of a lining support pillar of a double-chamber kiln; the construction process includes: for the odd layers in the ring brick layer, a heat-insulating brick close to the casting material around the pillar is horizontally longitudinally constructed and the side is close to the steel shell for construction, and a refractory brick is horizontally longitudinally constructed on the side of this heat-insulating brick facing the furnace interior, and a part of this refractory brick is longitudinally inserted into the position of the casting material; for the even layers in the ring brick layer and the upper and lower layers of the pillar, a heat-insulating brick on an outer C-lining adjacent to the inner C-lining is horizontally longitudinally constructed and the side is close to the steel shell for construction, and a refractory brick is horizontally longitudinally constructed on the side of this heat-insulating brick facing the furnace interior, and the end faces of this heat-insulating brick and this refractory brick are flush for construction and both are partially inserted into the connection between the inner C-lining and the outer C-lining. The present invention can solve the problem that the pillars and refractory materials of the double-chamber kiln are prone to cracking to generate straight seams and damage the furnace wall.

The invention belongs to the technical field of lime shaft kiln management and control, and particularly relates to a hydraulic monitoring control system suitable for an environment-friendly lime shaft kiln, which comprises a hydraulic loading control unit, a power source monitoring unit, a hydraulic cylinder motion monitoring unit, a real-time alarm unit and a remote control supervision end, a hydraulic pump station is used as a power source through the hydraulic loading control unit, and a hydraulic cylinder is accurately controlled by combining control elements such as a three-position four-way electromagnetic directional valve, an overflow valve, a one-way valve and a proportional pressure reducing valve; a power source monitoring unit, a hydraulic cylinder movement monitoring unit and a control element evaluation unit are used for effectively monitoring a power source, a hydraulic cylinder piston rod and a control element and performing abnormal early warning so as to remind a manager to take targeted improvement treatment measures in time, so that the supervision difficulty of the manager is remarkably reduced; hydraulic monitoring and control of the lime shaft kiln are achieved, and the intelligent degree is high.

The utility model relates to the field of lime production, in particular to an impurity separation device for lime production. When an existing device is used for separating impurities, quicklime is easily accumulated at one position of a filter screen, so that meshes are blocked by the quicklime, and the separation efficiency is low. An impurity separation device for lime production comprises a separation barrel, an opening is formed in the side face of the separation barrel, a sealing cover covers the opening of the separation barrel, a top cover is fixedly connected to the top of the separation barrel, a feeding hopper is arranged on the top cover, and a rotary discharging pipe is rotationally connected to the lower portion of the feeding hopper. The rotary discharging pipe rotates to drive the sliding pipe to rotate, the sliding pipe rotates to drive the contact frame to slide along the wave-shaped groove, and under the action of the wave-shaped groove, the contact frame drives the sliding pipe to slide on the rotary discharging pipe in a reciprocating mode, so that quicklime containing impurities is more evenly distributed on the filter screen, and lime powder can more smoothly fall off from the filter screen; and the separation efficiency is improved.

The invention belongs to the field of pulping and papermaking, and particularly relates to a method for promoting precipitation and sedimentation of silicon in non-wood pulp alkali recovery green liquor through Ca-Al synergism. The method comprises the following steps: 1, adding lime into the non-wood-pulp alkali recovery green liquor, carrying out a pre-causticization reaction, and ensuring that the use amount of the lime is 0.5-15% of the total causticized lime amount; secondly, aluminum salt is added into the green liquor treated in the first step for a silicon removal reaction, the molar ratio of the dosage of the aluminum salt to the silicon content of the green liquor is 0.1-2, and after the specified reaction time is reached, standing and settling are conducted. Through the Ca-Al synergistic effect, the settling speed of precipitated silicon is greatly increased, the settling height is remarkably reduced, the problems that the silicon removal rate is low by using a lime pre-causticization method alone and silicon particles are difficult to settle by using an aluminum salt method alone are solved, and an effective method is provided for industrial application of green liquor silicon removal; the problem of serious environmental pollution caused by discharge of a large amount of white mud is solved.

The utility model relates to the technical field of screening devices, and discloses a screening device for limestone production, which comprises a screening cylinder, lap joint blocks are fixedly connected to the inner walls of the two sides of the screening cylinder, screening filter screens are arranged on the upper surfaces of the lap joint blocks, and an auxiliary assembly is arranged on the upper surface of the screening cylinder. According to the limestone screening device, the auxiliary assembly is arranged, when limestone raw materials enter the screening cylinder, a worker installs the dustproof cover and seals the screening cylinder, and the situation that in the follow-up vibration screening process, the limestone raw materials generate a large amount of dust, and the air environment is affected is avoided; an abutting rod is arranged at the bottom of the dustproof cover, when the dustproof cover is installed, the abutting rod can be located on the upper surface of the screening filter screen, the screening filter screen can be fixed through cooperation with a lap joint block, the stability is improved, a worker can replace the screening filter screen after disassembling the dustproof cover, the abutting rod is separated from the surface of the screening filter screen, and the worker can disassemble the screening filter screen conveniently.

The application discloses a low-ash-consumption converter smelting method, adopts single-slag smelting, controls the converter scrap steel ratio in 8% to 26%, controls the top blowing oxygen supply flow in 3.0 to 4.0 Nm 3 / (min·t), controls the bottom blowing argon flow in 0.03 to 0.10 Nm 3 / (min·t); the smelting process is improved by the cooperation of the gun position and the charging; the solid waste slag is added in the converter blowing process, the content of CaO in the slag is controlled in 45% to 55%, and the content of MgO is controlled in 5.5% to 7.5%; meanwhile, the dust removal pressure ball is added to improve the activity of FeO in the slag, and the terminal carbon content of the converter is controlled to be less than or equal to 0.05%. By adding the solid waste slag in the smelting process, the slag needed to oxidize a large amount of iron elements to generate FeO is reduced, so that the total iron content of the slag is reduced; by adding the synthetic slag, the liquidity of the slag is ensured, and the carbon-oxygen reaction is promoted; the total iron content of the low-carbon steel converter terminal slag is stably controlled to be less than 14.5%, the metal yield is provided; the lime addition amount can be reduced, the lime addition amount is controlled to be less than or equal to 10 kg / t, and the cost is reduced.

The utility model relates to a single-chamber lime shaft kiln with a central burner, and belongs to the technical field of kiln chamber structures of lime kilns. Comprising a furnace body (1) and a central burner (8), the outermost layer of the furnace body (1) is of a steel plate structure, the interior of the furnace body (1) is a lime kiln chamber built by refractory materials, the furnace body (1) is sequentially provided with a preheating section (3), a calcining section (6) and a cooling section (9) from top to bottom, an inner cavity of the preheating section (3) is of a straight barrel type structure, and inner cavities of the calcining section (6) and the cooling section (9) are of a big-end-down circular truncated cone type structure. And the central burner (8) is arranged at the central position of the bottom of the furnace body (1) and is of a thin circular truncated cone structure with a small upper part and a large lower part. The device has a simple structure, is convenient to manufacture, can reduce the formation of suspended materials of the lime kiln, prolongs the normal operation time of the lime kiln, can improve the yield of the lime kiln, ensures the good operation of the lime kiln, and improves the production benefit of the lime kiln.

The utility model relates to the technical field of furnace valve body devices, in particular to a gas and material linkage feeding valve for an industrial furnace. Comprising a valve body, the valve body is sequentially provided with a first channel, a second channel and a third channel, the first channel and the second channel are distributed on the left side of the valve body, the axes of the first channel and the second channel are perpendicular to each other, a valve assembly used for controlling opening and closing of the first channel and the second channel is arranged behind the valve body, and a control valve is arranged at the third channel. A blanking opening is formed in the lower part of the right side of the valve body; the air inlet, the air outlet and the feeding port are integrated in the valve body, the size specification of the whole device is greatly reduced, the occupied space area is reduced, meanwhile, a closed structure is formed by the whole device and a kiln body after the whole device is installed, and the dust raising condition is avoided.

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 device for detecting oxygen content in a kiln body of a light-burned magnesia rotary kiln. The device comprises an oxygen analyzer, wherein the oxygen analyzer consists of a detection unit (oxygen probe) and a control unit (transmitter). Wherein the detection unit is arranged at the end part of the rotary kiln body, and the detector is composed of a sensing probe, a protection tube, a junction box, a standard gas port, a flange and other main components. The whole device is of a totally-closed structure, so that the sealing performance of the whole device is improved, and the service life is prolonged. The control unit is a terminal for a user to operate integrated functions and comprises an operation panel, a display interface and a current output port. The utility model discloses a device for detecting oxygen content in a light-burned magnesia rotary kiln body, relates to the technical field of rotary kiln oxygen content detection equipment, and aims to control the rotating speed of an air blower according to the oxygen content so as to achieve the purpose of controllable oxygen content. Therefore, energy is saved, and electric energy of enterprises can be saved.

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 application discloses a device and a production method for producing low-sulfur and low-chlorine lime powder by calcining limestone powder, and belongs to the field of limestone powder production and steelmaking. The decomposition furnace is divided into a high-temperature oxygen-deficient combustion region, a first limestone decomposition region and a second limestone decomposition region. A high-temperature oxygen-deficient CaO-free environment is created in the high-temperature oxygen-deficient combustion region, so as to promote the volatilization of residual KCl and NaCl, and then the residual KCl and NaCl are discharged through bypass air release technology. Limestone is added in the first decomposition region for decomposition, and combustion-supporting air is added in the second limestone decomposition region for strengthening combustion effect. In this way, the decomposition rate of limestone can be improved, the quality of steelmaking lime can be improved, and the steelmaking cost can be reduced.

The invention belongs to the technical field of fuel gas regulation and control, and relates to an annular double-chamber kiln fuel gas regulation and control system and method.The regulation and control method comprises the steps that S1, the following data of an annular double-chamber kiln are obtained, wherein the data include the daily output set value, the fuel gas flow theoretical value, the fuel gas heat value, the lime output set value and the inner and outer ring fuel gas percentage set value; calculating a gas theoretical value of a gas branch pipe where an inner ring gas electric control valve and an outer ring gas electric control valve of each annular double-chamber kiln are located; s2, calculating a deviation value according to the theoretical gas value and the collected gas measurement value; s3, on the basis of the deviation value, the opening degree adjusting proportion of the gas electric adjusting valve is calculated through a proportion band; and S4, gas regulation and control of the annular double-hearth kiln are completed according to the calculation result of the previous step. According to the regulation and control method provided by the invention, the real-time performance and accuracy of gas regulation and control in the annular double-chamber kiln can be realized, and the stable operation of the annular double-chamber kiln is ensured.

The utility model relates to the technical field of equipment shells, in particular to a dustproof shell of lime kiln temperature control equipment, which comprises a fixed seat, a limiting block is fixedly connected to the surface of the fixed seat, a front plate is movably connected to the upper surface of the fixed seat, a control panel is arranged on the surface of the front plate, and sliding columns are arranged at two ends of the front plate. A side plate is movably connected to the upper surface of the fixing base, sliding grooves are formed in the two ends of the side plate, fixing bolts are movably connected to the two ends of the surface of the side plate, an air inlet structure is arranged on the surface of the side plate, and an air outlet is formed in the surface of the side plate. The air inlet structure is arranged, the filter screen can shake along with rotation of the fan, dust on the filter screen is shaken down, manual disassembly and cleaning are not needed, all components are connected through the sliding grooves and the fixing bolts, assembly and disassembly are convenient, and applicability is good.