200results 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 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.

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 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 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 relates to the technical field of cranes, in particular to a hoisting device facilitating fixation of a kiln shell. Comprising a mounting frame, fixing seats, rotating wheels, a chain plate, a driving motor I and the like, the fixing seats are symmetrically connected to the bottom face of the mounting frame, the rotating wheels are rotationally connected to the fixing seats, the chain plate is wound on the rotating wheels, the driving motor I is mounted on the side faces of the fixing seats, and the end of a rotating shaft of each rotating wheel is connected with an output shaft of the driving motor I. The driving motor I drives the rotating wheels to rotate to lower the chain plates, the fixing rods and the moving frame can be connected in an inserted mode, so that the chain plates and the steel wire rope form a whole, the side faces of the four chain plates are limited through the four rotating wheels, the chain plates can be prevented from shifting in the front, back, left and right directions, and the service life of the chain plates is prolonged. Therefore, the steel wire rope can be prevented from deviating, the kiln shell can be prevented from shaking in the hoisting process, and it is guaranteed that the kiln shell can be rapidly aligned and installed.

The device comprises a flash replacement kiln, the flash replacement kiln comprises a powder-fuel gas heat exchanger and an oxygen-powder bin, slag sludge is ground by a Reynolds mill after moisture is evaporated and falls into the oxygen-powder bin, oxygen powder and fuel gas in the kiln are mixed and then subjected to fuel gas combustion, powder vapor is heated to 550-650 DEG C and subjected to a replacement reaction, slaked lime powder is generated, and the slaked lime powder is discharged into the flash replacement kiln. And the powder-fuel gas heat exchange tube is frequently impacted to reduce the temperature to 80-90 DEG C, CO2-enriched gas flow enters the drying kiln and the CO2-enriched gas-oxygen heat exchanger to be cooled, and part of condensed water is separated out by the cyclone dehydrator and sprayed into the kiln. The particle size of the limestone powder is smaller than 200 meshes, the temperature of an upper inner cavity is 550-650 DEG C, and the steam supply coefficient is 1.03-1.05. The limestone slag sludge can be recycled. The method is low in investment, high in waste heat recovery rate, low in emission, free of burning reduction of products, long in service life and large in carbon capture potential, and the key management object lime kiln device of the national two-high project is prevented from being used.

Method for calcining carbonate mineral stones in a parallel flow regenerative kiln wherein the method comprises an extraction step of the heated cooling gas through a series of extracting port located in an effective cooling zone within a cooling zone below a connecting channel, said heating cooling gas enters into an implementation port orifice and passes into a port duct to reach an evacuation element at an average extraction velocity comprised between 0.5 and 5 m / s.

The application discloses a suspension calcining system with a CO2 partial pressure reduction function and a method for preparing high-activity lime, and belongs to the technical field of lime stone calcination. The system comprises a pretreatment unit, a calcining unit, a cooling unit, a dust removal unit, a CO2 treatment unit and a product bin. The steps for preparing high-activity lime are as follows: after crushing the lime stone raw ore, the lime stone powder is added into a lime stone powder feeding bin, is fed into a cyclone preheater for three-stage preheating, is added into a suspension calcining furnace for calcination, air is introduced into the bottom of the calcining furnace during the calcination process, and the powder is ensured to be in a suspension state at all times; the powder after the calcination is sent into a cyclone cooler for three-stage cooling, and high-activity lime is obtained. In the process of preparing high-activity lime, the powder is heated more uniformly, the heat transfer efficiency is higher, the flowing gas timely discharges the CO2 generated by the decomposition, the CO2 treatment equipment is used for separation, the lime stone decomposition is moved to a positive direction, the decomposition speed is accelerated, and the decomposition efficiency is improved.

The application provides a lime rotary kiln preheater push head material return recovery device and relates to the technical field of lime calcination. The device comprises a preheater main body, a plurality of push heads are respectively arranged in a plurality of through channels formed in the preheater main body, one end of the through channel is connected with the outside world, and the other end is connected with a vertical feeding channel of the preheater main body; a layered space is formed between the upper part of the through channel and the upper part of the push head, two baffle structures are respectively connected with the two ends of the through channel, the distance between the bottom of each baffle structure and the upper part of the push head is less than 1.5 mm, a plurality of balls are arranged in the layered space, the push head is hollow, a plurality of through holes with a diameter less than 1.5 mm are arranged on the upper surface of the hollow part of the push head, the through holes are connected with the inside of the push head and the layered space, and the hollow space of the push head is connected with an external material collecting bin through a material guide pipe. The application can avoid the powder from sliding from the gap between the preheater main body and the push head, thereby reducing the waste of raw materials.

The utility model relates to a magnesite calcining system, which comprises a feeding device, a vertical preheater, a rotary kiln, a cylindrical cooler, a dust remover and a fan, the discharge end of the feeding device is positioned above the inlet of the vertical preheater, the outlet of the vertical preheater is connected with the rotary kiln, a burner is arranged at the kiln head of the rotary kiln, and the cylindrical cooler is connected with the rotary kiln. An outlet of the rotary kiln is connected with an inlet of the cylindrical cooler, an inlet of the dust remover is communicated with a smoke port of the vertical preheater, an outlet of the dust remover is connected with an inlet of the fan, and an outlet of the fan is connected with the chimney. According to the utility model, the vertical preheater is adopted, the pressure loss is low, and the air distribution is uniform, so that the preheating efficiency is high, the power consumption of the system is low, the decomposition rate of preheated magnesite raw materials entering a kiln is high, the small-particle-size magnesite raw materials of 10-50mm can be calcined, proper pressure and stroke of the hydraulic push rod can be determined according to different feeding particle sizes of the magnesite raw materials, the material pushing balance is ensured, and the energy consumption is low. The resource utilization rate is improved; and a cylindrical cooler is selected, so that the cooling effect is better.

The utility model discloses novel energy-saving limestone calcining treatment equipment, which relates to the technical field of limestone processing, and comprises a base and a calcining kiln arranged on the base, the calcining kiln comprises a calcining cylinder, a feeding cylinder, a sealing cover and a discharging pipe; the calcining barrel is of a hollow structure, one end of the calcining barrel is open, the feeding barrel is rotationally arranged on the outer wall of the open end of the calcining barrel, the sealing cover is arranged at the end, away from the end cover, of the feeding barrel, and the discharging pipe is arranged below the side, away from the feeding barrel, of the calcining barrel; an electric heating plate is arranged in the interlayer of the calcining cylinder; two bearings are arranged on the outer wall of the calcining cylinder, the calcining cylinder can rotate in the bearings, a first lifting device used for adjusting the angle of the calcining cylinder is arranged at the bottom of each bearing, and the first lifting devices are arranged at the top of the base; and the function of uniform calcination is achieved, exhausted hot air is utilized, limestone is preheated, the cost can be reduced, and the practicability is improved.

The present invention discloses a decarbonation process of carbonated materials, in particular limestone and dolomitic limestone, with CO2 recovery in a multishaft vertical kiln (MSVK) comprising a first, a second, and optionally a third shaft with preheating, heating and cooling zones and a cross-over channel between each shaft, alternately heating carbonated materials by a combustion of at least one fuel with at least one comburent up to a temperature range in which carbon dioxide of the carbonated materials is released, the combustion of the fuel and the decarbonatation generating an exhaust gas, the decarbonated materials being cooled in the cooling zones with one or more cooling streams, wherein a mixing between the exhaust gas and the one or more cooling streams is minimized by operating said kiln in a mode in which between two subsequent alternating heating cycles between the first and the second or the third shaft, the decarbonated materials in at least the first, the second and / or the third shaft are cooled with the one or more cooling streams while a supply of the fuel in each shaft is stopped.

The utility model relates to the technical field of magnesia production, in particular to a kiln entering device for magnesia production, which comprises a funnel, a screening component is arranged in an inner cavity of the funnel, the screening component comprises two convex blocks, the outer sides of the two convex blocks are fixedly connected with the inner wall of the funnel, a screen is arranged above the two convex blocks, and the outer side of the screen is fixedly connected with the inner wall of the funnel. Springs are arranged at the joints of the two ends of the bottom of the screen and the protruding blocks, and striking plates are arranged above the two sides of the top of the screen. The magnesite is firstly placed on the screen, then the motor operates, the motor drives the rotary table to rotate, the rotary table drives the guide rod to rotate, the guide rod is matched with the guide groove to drive the push plate to move downwards, the push plate drives the push rod to move downwards, the movable plate is matched with the push rod to move downwards, and the push rod drives the striking plate to move downwards. The striking plate drives the screen to press downwards, and at the moment, the screen is matched with the protruding block to drive the spring to conduct extrusion.

The invention provides a method for efficiently dephosphorizing converter slag by using electric furnace slag, which comprises the following steps: discharging the electric furnace slag after electric furnace smelting is finished, sampling and analyzing main chemical components of the electric furnace slag, and calculating the amount of active lime needing to be supplemented and added; the discharged electric furnace slag is conveyed to a converter area through a special slag tank with a heat preservation function, and the hot-state electric furnace slag is poured into a converter through a traveling crane; the method comprises the following steps: firstly adding scrap steel into a converter, then adding molten iron, supplying oxygen for blowing, finally adding active lime, adjusting the alkalinity of slag to 2.5-4.5, blowing to the end point, and tapping. According to the method, the low-phosphorus characteristic of the electric furnace slag is combined, the electric furnace slag has good interface reaction performance and dephosphorization capacity in the thermal state and is directly returned to the converter smelting process, lime consumption is reduced, efficient dephosphorization of the converter slag is achieved, efficient dephosphorization and resource utilization of the electric furnace slag are achieved, and the method has the advantages of saving energy, reducing emission, reducing cost, improving efficiency and recycling resources.

The utility model provides a limestone rotary kiln preheating device, which relates to the technical field of preheating equipment, and comprises a preheater body, a stock bin is arranged on one side of the preheater body, a blanking pipe is arranged on one side of the preheater body, the blanking pipe is connected with the stock bin, a connecting pipe is arranged on one side of the preheater body, and the connecting pipe is connected with the stock bin. A hydraulic push rod is arranged on one side of the preheater body, a platform is arranged on one side of the preheater body, and a protection device is arranged on one side of the stock bin. The situation that in heavy rain weather, rainwater falls into the preheater body through a gap between the stock bin and the preheater body, the rainwater is accumulated in the preheater body, and rust is generated in the preheater body is reduced, the cleanliness of the interior of the preheater body is improved, and the service life of the preheater body is prolonged.

Parallel flow regenerative kiln, comprising at least two shafts (1, 2) interconnected by a crossover channel (4) wherein each shaft comprises means for injecting a heated gas (6) inside the shaft (1) in calcination working at the top of the calcination zone (B) and means for removing (21, 23) from the kiln the cooling air which has been heated in contact with the calcined material, at a level lower than the crossover channel (4).

The parallel flow heat accumulating type double-hearth lime kiln comprises a hearth kiln I and a hearth kiln II, preheating zones are arranged at the upper end of the hearth kiln I and the upper end of the hearth kiln II, calcining zones are arranged in the middle of the hearth kiln I and the middle of the hearth kiln II, cooling zones are arranged at the lower end of the hearth kiln I and the lower end of the hearth kiln II, and cooling zones are arranged at the lower end of the hearth kiln II. A connecting channel is arranged at the joint of the first hearth kiln and the second hearth kiln. According to the double-chamber lime kiln, the damaged arc-shaped shell can be detached through the detachable chamber kiln shell, maintenance or overhaul is convenient, in addition, the reinforcing plates, the reinforcing grooves and the reinforcing pipes are arranged on the outer surface of the arc-shaped shell, the compression resistance and impact resistance of the double-chamber lime kiln are improved, the service life of the double-chamber lime kiln is prolonged, and the service life of the double-chamber lime kiln is prolonged. By arranging the heat preservation and insulation blocks made of the aluminum silicate ceramic fiber materials and combining the refractory lining built by the refractory bricks, the heat preservation and insulation performance is good, heat loss is effectively reduced, energy is saved, and consumption is reduced.

The invention provides a lime kiln calcination control method and system, and relates to the technical field of lime kiln calcination, and the method comprises the following steps: obtaining fusion temperature data of a plurality of radial areas of a calcination zone; processing the fused temperature data and preset successful case data through a particle swarm optimization algorithm, and generating an expected temperature set value sequence of each radial partition of the calcining zone; and generating a fuel flow control parameter based on the expected temperature set value sequence and a preset physically guided neural network model. By adopting the technical scheme, the spatial temperature field distribution of the calcining zone of the lime kiln is controlled to a certain extent under complex production working conditions, and the technical effect of collaborative optimization of temperature uniformity, product quality and production energy efficiency is achieved.

The application discloses a material uniform distribution device of a lime calcining kiln and relates to the technical field of lime calcining equipment. The material uniform distribution device of the lime calcining kiln, in the device, the change of the incoming material quantity directly drives the adjustment of the inclination angle of the distribution plate, when the incoming material quantity is too large, the distribution plate increases the inclination range, speeds up the falling and spreading speed of the material, and avoids the accumulation of the local material in the kiln, when the incoming material quantity is too small, the distribution plate reduces the inclination range, slows down the falling speed of the material, and prevents the sparse distribution of the material, through the real-time linkage of the incoming material quantity and the distribution angle, the distribution plate can uniformly spread the material in the lime kiln, forms a material layer with consistent thickness and uniform distribution, and guarantees the uniformity of the calcining reaction from the source.

This invention provides a method for preparing low thermal conductivity magnesia-alumina spinel bricks for lime kilns, belonging to the field of finished lime kiln refractory bricks. The method uses magnesia and corundum powder in a mass ratio of 90:10 as the main materials, adding 1% Y₂O₃ sintering aid and 4% Mg(OH)₂-Al(OH)₃ sol binder. The mixture is then pressed, fired at high temperature, and cooled in the kiln. During firing, the sol decomposes to generate nano-MgO and Al₂O₃ particles, filling the grain boundary pores and forming a dense, low thermal conductivity magnesia-alumina spinel. Y₂O₃ effectively reduces the firing temperature. This brick is an alkaline, chromium-free material. When used in the combustion zone of a lime kiln, it exhibits excellent kiln lining adhesion and thermal shock stability, reducing kiln temperature by 30–50°C, achieving energy saving, consumption reduction, and extending kiln lining life.

The utility model relates to the technical field of lime shaft kilns, in particular to a double-hearth kiln fuel spray gun which comprises a gas pipeline, a pulverized coal pipeline, an inlet sleeve and an outlet sleeve. The coal gas pipeline and the pulverized coal pipeline are both in an L shape, the inlet end of the coal gas pipeline is fixed to the outer wall of the inlet sleeve and communicated with an inner cavity of the inlet sleeve, the inlet sleeve is arranged on the horizontal portion of the pulverized coal pipeline in a sleeved mode, and the two ends of the inlet sleeve are connected with the outer wall of the pulverized coal pipeline in a sealed mode. A coal gas inlet pipe is arranged on the inlet sleeve; the outlet end of the gas pipeline is fixed on the outer wall of the outlet sleeve and communicated with the outlet sleeve, the lower portion of the pulverized coal pipeline is arranged in the outlet sleeve in a penetrating mode in the axial direction of the outlet sleeve, and the top end of the outlet sleeve is connected with the outer wall of the pulverized coal pipeline in a sealed mode. The utility model provides the double-hearth kiln fuel spray gun which not only realizes the diversification of fuel, but also does not limit the use of single fuel.

The utility model discloses magnesite crushing equipment for light burning powder production, which relates to the technical field of light burning powder production and comprises a machine body, a pair of supporting plates fixedly connected between the front wall and the rear wall of the machine body, a plurality of springs fixedly connected to the upper surfaces of the supporting plates, a vibrating hopper fixedly connected to the upper ends of the springs, and a sieve plate mounted on the left side of the bottom surface of the vibrating hopper. A crushing wall is fixedly arranged on the inner surface of the crushing chamber; an inclined plate is fixedly connected to the inner surface of the machine body and located below the crushing chamber; a main shaft is rotationally connected to the inner bottom surface of the machine body; a protective sleeve is fixedly connected to the interior of the inclined plate; according to the utility model, magnesite can be sieved through the vibration of the sieve plate, and small pieces of magnesite which do not need to be crushed pass through the sieve plate and fall onto the inclined plate, so that the small pieces of magnesite which do not need to be crushed are prevented from falling into the crushing chamber, and the power consumption of the eccentric crushing cone is prevented from being increased.

The utility model belongs to the technical field of equidistant stretching of a filter plate of a filter press for lime kiln desulfurization sludge, and discloses an equidistant stretching device of a filter plate of a filter press for lime kiln desulfurization sludge, which is characterized in that a sliding body is fixedly arranged in the middle of the front and rear side surfaces of a frame type filter plate; the thrust plate is fixedly arranged on the upper portion of the right inner side face of the support. The fixed body is fixedly arranged in the middle of the front and rear side surfaces of the thrust plate; the filtered water discharge pipes are fixedly arranged on the front side and the rear side of the bottom of the frame type filter plate, and the filtered water discharge pipes are communicated with the interior of the frame type filter plate; the lifting equidistant stretching mechanisms are fixedly arranged on the front side and the rear side of the support respectively, and the lifting equidistant stretching mechanisms achieve one-time stretching action on the frame type filter plate through lifting action. The utility model has the beneficial effects that under the lifting matching of the lifting equidistant stretching mechanism, the frame type filter plate can be stretched at one time, so that sludge cakes formed by filtering can be discharged at one time, and the discharging operation efficiency of the sludge filter cakes is improved.

The present invention provides a method for calcining mineral rocks in a regenerative co-current vertical shaft furnace that, without altering the cycle operation of the PFRK-type furnace or making little to no changes to its structure, at least partially improves the problem of significant CO2 emissions into the atmosphere and enables the recovery of CO2 present in the gaseous waste emitted by the furnace. [Solution] A method for calcining mineral rock in a regenerative co-current vertical shaft furnace is provided, comprising: collecting a portion of the gaseous waste discharged from the furnace shaft in preheating mode 2 in a recirculation circuit 18; mixing the portion collected from the gaseous waste with high-concentration oxygen from an oxygen source 20 to form an oxidizing mixture; and ensuring the combustion of fuel in the presence of oxygen by inserting the oxidizing mixture into the top of the shaft 1 in calcination mode, wherein the gaseous waste discharged from the furnace has a high concentration of CO2.