200 results about "Cement grinding" patented technology

The invention discloses a liquid cement grinding aid and a preparation method thereof, and belongs to the technical field of cement grinding aid preparation, the liquid cement grinding aid comprises the following raw materials by weight: 76-80% of water, 18-20% of hydrochloric acid and 2-4% of sodium hexametaphosphate. The preparation method of the liquid cement grinding aid comprises the following steps: uniformly mixing the raw materials according to the weight percentage, and carrying out activation reaction to prepare the liquid cement grinding aid. The cement grinding aid disclosed by the invention is prepared by mixing hydrochloric acid, water and sodium hexametaphosphate according to a specific proportion, and through scientific regulation and control of the synergistic effect of all the components, the cement grinding aid has good grinding aiding performance and remarkably improves the specific surface area and grinding aiding efficiency of cement; the component design fully considers the cement hydration process and the compatibility with the water reducing agent.

The invention relates to the technical field of powder selecting machines, and particularly discloses a composite powder selecting machine which comprises a first filtering bin, an airflow bin and a second filtering bin, a plurality of scraping plates are rotationally connected in the first filtering bin through a gear ring, a fixing ring is rotationally connected to the gear ring, a discharging opening is formed in the fixing ring, a first vertebral plate is fixedly connected in the first filtering bin, and a second vertebral plate is fixedly connected in the second filtering bin. The airflow bin is fixedly connected with a second filtering bin, a vertebral plate II and a conical part are fixedly connected in the second filtering bin, the second filtering bin is fixedly connected with a discharging bin, the vertebral plate II is fixedly connected with a material guide pipe, the gear ring is connected with a motor II through a gear, and the airflow bin is connected with an air pump through an air guide pipe. The cement grinding device has the beneficial effects that cement can be scattered through a stirring plate in the storage bin, coarse powder can be filtered out through a first vertebral plate in the first filtering bin and is discharged from a discharging port through a scraper blade, the cement can rotate along a second vertebral plate through the airflow bin, medium powder and fine powder are separated, and finally the medium powder and the fine powder are separated.

The invention discloses a preparation method of low-cost solid-waste-based sulphoaluminate cement, and relates to the technical field of cement preparation.The preparation method comprises the steps of solid waste pretreatment, ingredient design, raw material preparation, low-temperature calcination, clinker quenching and cement powdering.By means of the scheme design, high-aluminum / sulfur-rich solid waste such as red mud, desulfurized gypsum and fly ash is used for replacing 70% or above of natural raw materials, and the low-cost solid-waste-based sulphoaluminate cement is obtained; for example, expensive alumina, natural gypsum and the like, the cost of the raw materials can be directly reduced by more than 40%. Wherein the red mud is used as the waste residue of the aluminum oxide industry, the original treatment cost is very high, and the red mud is converted into an effective aluminum source nowadays, so that negative-cost raw material utilization is realized, and the waste residue treatment cost is also saved; the desulfurized gypsum is used as a power plant waste material to completely replace natural gypsum, so that the sulfur source cost is reduced by 60%. Through comprehensive calculation, the production cost of the clinker is reduced by 30-35% compared with that of the traditional sulphoaluminate cement.

The utility model relates to the technical field of cement production, and discloses a cement grinding device for cement production, which comprises a fixed plate, the left end of the top of the fixed plate is fixedly connected with a base plate, the top of the base plate is fixedly connected with a motor, and the output end of the motor is fixedly connected with a first gear. The front end of the surface of the first gear is in meshed connection with a second gear, the inner diameter of the second gear is fixedly connected with a grinding tank, the right end of the top of the fixing plate is fixedly connected with a first supporting plate, the top of the first supporting plate is fixedly connected with a first supporting plate, and the top of the first supporting plate is fixedly connected with a weighing sensor. The top of the weighing sensor is fixedly connected with a material box, and the left end of the outer wall of the material box is fixedly connected with a U-shaped plate. According to the utility model, materials are placed in the material box through the material box, the weighing sensor, the air cylinder, the baffle and the transfer bin, then the weighing sensor weighs the materials, and the air cylinder is started to drive the baffle to move upwards.

The invention discloses a steel slag cement grinding aid and a preparation method and application thereof, and belongs to the technical field of concrete admixtures, the steel slag cement grinding aid comprises the following raw materials by mass: 80-90% of steel slag, 4-6% of an acid solution and 6-14% of magnesium aluminum silicate waste residue. The preparation method comprises the following steps: crushing the steel slag, and mixing and stirring the crushed steel slag, the acid solution and the magnesium aluminum silicate waste residue to obtain the steel slag cement grinding aid. The steel slag cement grinding aid prepared by the method provided by the invention is low in cost, non-toxic and non-corrosive, improves the grinding effect of a cement product, provides a way for solving the technical problem for waste slag and steel slag discharged by iron and steel enterprises, and has the effects of saving energy, reducing emission, reducing carbon emission, protecting the environment and improving the economic benefit. And moreover, the preparation method is advanced and is widely suitable for being used in cement enterprises.

The utility model discloses an adjustable cement grinding device in the technical field of cement grinding, which comprises a box body, a grinding plate is arranged in the box body, the lower end of the box body is fixedly connected with a fixing plate, and the grinding plate is fixedly connected with the fixing plate; a sliding rod is movably connected to the fixing plate, sliding frames are movably connected to the two ends of the sliding rod, a connecting plate is fixedly connected to each sliding frame, a driving assembly is fixedly connected to the upper end of each connecting plate, a mounting block is movably connected to the driving assembly, and the mounting block is fixedly connected to the box body. The driving assembly can drive the rolling plate to descend according to actual use, so that the grinding fineness of the cement powder is adjusted; and through different rotating angles of a driving block, a driving groove enables a sliding rod to be located at different heights, cement powder is ground to different fine degrees, and the effect that the particle size can be adjusted when the cement powder is ground is achieved.

The utility model discloses environment-friendly low-alkali cement grinding aid stirring equipment which comprises a stirring machine shell, an inner cavity is fixedly connected in the stirring machine shell, the top end of the inner cavity is in threaded connection with a first rotating shaft, a plurality of push type paddles are fixedly connected to the first rotating shaft in the vertical direction, and the first rotating shaft is in threaded connection with a second rotating shaft in the vertical direction. The top surface of the stirrer shell is fixedly connected with a motor I, and the output end of the motor I is fixedly connected with the rotating shaft I; a second rotating shaft is in threaded connection with the top end of the stirrer shell, a plurality of turbo type paddles are fixedly connected to the second rotating shaft in the vertical direction, a second motor is fixedly connected to the top face of the stirrer shell, and the output end of the second motor is fixedly connected with the second rotating shaft; liquid components are mixed with low shear force in the pre-stirring stage of the push-type paddle, the scrapers synchronously remove attachments on the wall of the cavity, and the turbo-type paddle rapidly crushes solid particles through high shear force and promotes uniform fusion of materials, so that the reaction activity of the grinding aid and the stability of a finished product are remarkably improved.

The utility model relates to the technical field of cement processing, in particular to a cement grinding aid adding and adjusting assembly which comprises a box body, a hydraulic cylinder, a water tank and a mounting box, the mounting box is arranged on the outer wall of one side of the box body, the water tank is fixed in the mounting box, the hydraulic cylinder is arranged on one side of the water tank, a buffering groove is formed in the upper end of the hydraulic cylinder, and the buffering groove is communicated with the water tank. A piston is movably installed in the buffer tank, a water pump is arranged between the hydraulic cylinder and the water tank, and a wagon balance is arranged at the lower end of the box body. According to the cement grinding aid adding device, the constant-proportion variable-quantity adding effect of a cement grinding aid is achieved through cooperation of the structures, and the problems that an existing cement grinding aid adding device for a cement grinding mill lacks the self-adaptive effect of adding a proper amount of the cement grinding aid, so that the amount of the added grinding aid cannot reach the proper amount; the cement stirring effect is easily reduced; and resources are wasted.

The utility model discloses a switchable cement grinding device, and relates to the technical field of cement grinding. The switchable cement grinding device comprises a roller press, mounting plates are fixedly connected to the front side and the rear side of the position of a discharging opening of the roller press, a first conveying belt is fixedly connected to the positions, located at the lower end of the discharging opening of the roller press, of the inner sides of the mounting plates, and an adjusting conveying belt is arranged at the lower end of the right side of the first conveying belt; the adjusting conveying belt is rotationally connected with the interior of the mounting plate, an adjusting motor is fixedly connected to the front end of the rotating position of the adjusting conveying belt and the mounting plate, a second conveying belt is arranged at the lower end of the right side of the adjusting conveying belt, and a ball mill is arranged on the right side of the second conveying belt; and the right side of the second conveying belt communicates with a feeding port of the ball mill, a third conveying belt is arranged at the lower end of the adjusting conveying belt, a V-shaped airflow classifier is arranged on the front side of the third conveying belt, and a control cabinet is installed at the front end of the roller press.

The present invention discloses an intelligent control method for particle grading in cement grinding, which relates to the field of cement grinding control technology, including: S1: real-time acquisition of grinding system operating parameters, including mill current, powder selector speed, feed rate, grinding sound signal, and online particle size detection data; S2: calculation of core characteristic parameters based on the operating parameters, including effective crushing work index, dynamic fine powder retention rate, and material filling state index in the mill; S3: inputting the core characteristic parameters into a grading prediction model and outputting a predicted particle size distribution; S4: generating an adjustment instruction through a hierarchical control strategy based on the predicted particle size distribution; S5: outputting the adjustment instruction to an actuator. By real-time acquisition and analysis of grinding system operating parameters, combined with the core characteristic parameters, the particle size distribution is accurately predicted, and closed-loop intelligent control is achieved, thereby improving grinding efficiency, stability, and product quality, while optimizing control accuracy.

The invention relates to the technical field of cement production, and discloses a production method for improving the cement grinding efficiency by synergistically doping mineral powder. Through the arrangement of the middle material mixing device, primarily-ground powder ground by the grinding equipment and mineral powder can be mixed, then the mixed powder is fed into the efficient powder concentrator for winnowing, the mineral powder can reduce the temperature of the primarily-ground powder on one hand and can assist grinding of coarse powder on the other hand, and the cooling and grinding aiding effects form a cooperation, so that the grinding efficiency is improved, and the grinding efficiency is improved. And the components jointly act on a closed-loop circulation system. The temperature and the viscosity of the re-ground coarse material are reduced, and the grinding-aid medium is introduced, so that the grinding environment of the ball mill is fundamentally improved, and energy can be more effectively used for material crushing instead of heat production and invalid friction, thereby obviously improving the machine-hour yield of a system under the same energy consumption, or effectively reducing the power consumption of a unit product under the same yield.

The utility model discloses a cement ore grinding powder uniform external mixing device which comprises an external mixing assembly, a rotating assembly, a cement mixing machine and a stirring assembly, and the external mixing assembly comprises a storage bin and a conveying pipe arranged at the bottom of the storage bin. The rotating assembly comprises a support arranged at the bottom of the storage bin, a rotating motor arranged on the inner side of the support, a rotating wheel arranged at the output end of the rotating motor and a discharging pipe connected with a rotating wheel belt, and the cement mixing machine is arranged under the storage bin. The stirring assembly comprises a speed reducer arranged at the top of the cement mixer, a driving motor arranged at the top of the speed reducer, a stirring shaft arranged at the output end of the driving motor, a baffle ring inserted outside the stirring shaft and a second fastening knob in threaded connection with the baffle ring. According to the utility model, the arranged rotating component can reciprocate so as to uniformly mix mineral powder, and the arranged baffle ring can block the falling mineral powder so as to disperse the mineral powder, so that the mixing efficiency is improved.

The application belongs to the field of ball mills, and particularly relates to a cement grinding mill system and a ball matching method. The cement grinding mill system comprises a control module, the control module comprises a device control unit, an instruction sending unit, a model construction unit and an information processing unit, the control module is used for controlling the device running state, sending control instructions, establishing a mathematical model for calculation, obtaining required friction coefficients and other related parameters, and guiding the ball mill ball matching of a cement enterprise in actual production. The ball matching method can significantly improve the grinding efficiency of the ball mill, make the operation of the ball mill more stable, reduce unnecessary energy consumption, reduce the wear of the lining plate in the ball mill, reduce the frequency of maintenance and replacement, realize the automatic operation and optimized control of the cement ball mill by adopting intelligent control technology, and improve the production efficiency.

The invention discloses a preparation method of a spherical carbon nano polymer steel slag cement grinding aid, which comprises the following steps: (1) mixing and dissolving a polycarboxybenzene compound, an amino alcohol compound and a condensing agent in an organic solvent to prepare a solution A, stirring and activating at a first temperature, then keeping stirring and heating to a reaction temperature, and reacting at a certain pressure to obtain a reaction solution B; after the reaction is finished, centrifuging and taking supernate, and filtering to obtain a polymer solution; (2) mixing the obtained polymer solution with hydrochloric acid to prepare a solution B, placing the solution B in an ice salt bath, dropwise adding a nitrite solution, and stirring for a first reaction; and adding thiocyanate and a cuprous salt catalyst, removing the ice salt bath, heating, carrying out a second reaction, and cooling to room temperature after the reaction is finished to obtain the spherical carbon nano polymer steel slag cement grinding aid. The grinding aid can improve the grinding efficiency of the steel slag cement, the performance of the steel slag cement is improved, and the process is simple and efficient.

The application discloses a kind of hydrogen production low-carbon cement system and method using photovoltaic power generation, the system includes photovoltaic power generation system, electrolytic water hydrogen production system, raw material grinding system, rotary kiln calcination system, cement grinding system and carbon resource utilization device;Photovoltaic system provides clean power for electrolytic device, and hydrogen is efficiently prepared at high temperature using solid oxide electrolytic cell;Hydrogen is input into rotary kiln as the only fuel by multi-point injection and oxygen combustion-supporting structure, realizing zero carbon emission of cement calcination process;Carbon dioxide in system tail gas is synthesized into methanol after purification together with hydrogen, and energy-carbon cycle closed loop path is constructed;Through multistage waste heat recovery and intelligent control system, the linkage optimization of photovoltaic output, electrolysis load, calcination heat intensity and carbon conversion efficiency is realized;The application has significant advantages in improving energy utilization efficiency, reducing carbon emission, promoting resource coordination and intelligent control, and is suitable for the construction of new green cement industrial platform.

The application provides a method and system for preparing low-carbon cement by using coal gasification ash in a graded manner, and the method comprises the following steps: dividing the coal gasification ash into carbon-rich ash, medium-carbon ash and carbon-poor ash according to the carbon content; feeding the carbon-rich ash and raw coal into a coal powder preparation workshop to prepare a first mixture as a clinker calcination fuel; feeding the medium-carbon ash into a raw material preparation workshop after metering to be ground and dried together with other raw material components; preparing clinker by decomposing and calcining the second mixture after mixing uniformly and cooling; feeding the mixture of the clinker and other cement components and the carbon-poor ash into a cement preparation workshop to prepare finished cement. The carbon content of the coal gasification ash is divided in a graded manner to obtain coal gasification ash materials with different characteristics, and the cement production process characteristics are combined to be used in three process sections of raw material grinding, clinker calcination and cement grinding, so that the coal gasification ash is used in a large amount and in a large scale in the building material resources, and the carbon emission in the cement clinker production process is reduced.

The invention discloses quaternary mixed cement containing silica fume and a preparation method of the quaternary mixed cement, and relates to the technical field of building materials. 10%-18% of fly ash; 3%-8% of silica fume; through the synergistic effect of quaternary raw materials including the Portland cement clinker, the fly ash, the silica fume and the slag powder and in combination with precise raw material pretreatment, ingredient mixing, cement grinding and curing forming processes, the problems that traditional Portland cement is limited in later strength increase, insufficient in thermal stability and the like are effectively solved; the 3d compressive strength of the finished cement is larger than or equal to 26.0 MPa, the 28d compressive strength of the finished cement is larger than or equal to 50.0 MPa, the strength is stable, the performance is excellent, meanwhile, the silica fume is evenly dispersed, the pozzolanic effect of the silica fume is fully exerted, the thermal stability of a generated hydration product is superior to that of traditional cement, and the cement is suitable for high-strength and high-temperature-resistant engineering.

The utility model relates to the technical field of dust collection devices, in particular to an efficient and energy-saving dust collection device of a cement mill roller press, which comprises a base body, a motor base is arranged on the upper surface of the base body, a motor body is arranged on the upper surface of the motor base, and a shell body is mounted on the outer surface of the motor base. A pipeline connecting piece is arranged on the outer surface of the shell body; and the outlet reducer pipe is mounted on the outer surface of the pipeline connecting piece. According to the utility model, the area of the air inlet of the cyclone dust collector is designed to be smaller than the section of the cylinder surface, so that the tangential speed of the inlet airflow of the dust collector is increased, the dust collecting efficiency is improved, ultrafine powder ground by the roller press is collected by the dust collector, the collected ultrafine powder is conveyed into the finished product air conveying chute through the air conveying chute, and the finished product is conveyed into the finished product air conveying chute through the finished product air conveying chute. And the superfine materials are prevented from circulating in a ball mill system, so that the operation efficiency of the grinding system is improved.

The utility model relates to the technical field of cement production equipment, and provides a surge bin stepped scraper-trough conveyer for a roller press of a cement grinding mill, which comprises a plurality of conveying pipes connected in sequence, and the inner diameters of all the conveying pipes are sequentially reduced from top to bottom; an inclined face is arranged on the side, close to the lower-end conveying pipe, of the conveying pipe and used for guiding materials into the lower-end conveying pipe. The surge bin stepped scraper-trough conveyer for the cement grinding mill roller press aims at reducing the situation that materials are not evenly distributed when entering a stable retention bin.

The utility model provides a cement grinding mill, which relates to the technical field of cement grinding mills and comprises a known grinding mill for grinding cement and a screening box arranged at a discharge port of the grinding mill. The lifting frame comprises two groups of opposite inner side walls which are distributed in an up-down staggered mode, the opposite inner side wall located on the upper portion is rotationally connected with the lower-layer filter plate, the impurity box is arranged below the lower-layer filter plate, therefore, under the condition that the lifting frame does not descend, materials can stay on the surface of the lower-layer filter plate all the time, the staying time of the materials is prolonged, and the service life of the materials is prolonged. The rotating shaft drives the two eccentric wheels to rotate, and the side edges of the eccentric wheels can push the lower-layer filter plate to swing in a reciprocating mode, so that reciprocating sliding of the materials is achieved by controlling the retention time of the materials and utilizing reciprocating swing of the lower-layer filter plate, and qualified materials can be conveniently accelerated to pass through the lower-layer filter plate to be screened and separated.

The invention belongs to the field of cement grinding, and particularly discloses a cement grinding device for cement production, which comprises a grinding frame, a self-supply rolling type cement grinding mechanism, an adaptive anti-blocking piece, a linkage trigger dustproof device and a movable collecting box, the self-supply rolling type cement grinding mechanism is arranged on the grinding frame, the adaptive anti-blocking piece is arranged on the grinding frame, the linkage trigger dustproof device is arranged on the adaptive anti-blocking piece, and the movable collecting box is arranged on the linkage trigger dustproof device. The adaptive anti-blocking piece is arranged below the self-supply rolling type cement grinding mechanism, the linkage triggering anti-dust device is arranged on the grinding frame and connected with the self-supply rolling type cement grinding mechanism, the movable collecting box is arranged in the grinding frame in a drawing mode, and the movable collecting box is arranged below the adaptive anti-blocking piece. According to the cement grinding device for cement production, a unique smashing mode combining hammering and rolling is adopted, the grinding efficiency can be improved, jamming can be avoided, discharging blockage can be prevented, the automatic spraying and dust falling functions are achieved, and the equipment operates stably so that the grinding quality can be guaranteed.

The utility model relates to the technical field of cement grinding aid raw material production equipment, and particularly discloses a constant-dripping device for producing a sulfonate copolymer cement grinding aid raw material. The lower end of the charging bucket is provided with a discharging pipe, the lower end of the discharging pipe is connected with a transverse pipe, the transverse pipe is connected with a feeding pipe, the transverse pipe is provided with a discharging hole capable of communicating the discharging pipe with the feeding pipe, the transverse pipe is internally connected with a rotating shaft in a sealed and pivoted mode, and the rotating shaft extends out of the transverse pipe and then is connected with a gear motor. A plurality of flow dividing pipes are arranged at the lower end of the discharging pipe, the lower ends of the flow dividing pipes are fixed to the transverse pipe, the number of the feeding pipes and the number of the discharging holes are the same as that of the flow dividing pipes, and the discharging holes are spirally and evenly distributed in the length direction of the rotating shaft. According to the utility model, the rotating shaft is arranged, and formaldehyde solution is added into a reaction system through the blanking hole in the rotating shaft by virtue of the constant-speed rotation of the rotating shaft; in addition, the plurality of blanking holes are uniformly distributed in the spiral shape, and meanwhile, the blanking holes are strip-shaped, so that the feeding is more uniform, and the speed is easier to control.

The invention discloses a nano polymer cement grinding aid with a spherical structure and a preparation method thereof, the preparation method comprises the following steps: (1) mixing an aminopolycarboxylic acid compound, an aniline compound and a condensing agent in a solvent, and carrying out condensation reaction under microwave reaction conditions to obtain a spherical prepolymer; and (2) dissolving the obtained spherical prepolymer in a solvent, adding a polyhydric alcohol amine compound, and carrying out esterification reaction under the action of a catalyst to obtain the nano polymer cement grinding aid with the spherical structure. The grinding aid disclosed by the invention can greatly reduce the grinding fineness of cement powder, improve the grinding efficiency of the cement powder, can effectively complex ions generated by cement hydration to promote cement hydration, and has excellent grinding aiding and strength enhancing properties.

The utility model provides a liquid cement grinding aid filtering device which comprises a conveying pipe, the middle of the conveying pipe is in threaded connection with a Y-shaped filter, the Y-shaped filter comprises an inclined pipe, a mounting cover is arranged on the surface of one side of the inclined pipe, a handle is fixedly mounted on the surface of the mounting cover, and a filtering mechanism is arranged in the inclined pipe. And a connecting mechanism is arranged between the mounting cover and the inclined pipe. Through the use of the filtering mechanism, when a grinding aid passes through the Y-shaped filter, tiny impurities in the grinding aid can be filtered through the filter screen cylinder arranged in the Y-shaped filter, so that pipeline blockage and spray head blockage are avoided; and by arranging the motor, the connecting block and the cleaning brush, the motor can drive the connecting block and the cleaning brush to rotate, the cleaning brush can clean the inner wall of the filter screen cylinder, and the situation that blockage occurs, and quick circulation of the grinding aid is affected is avoided.

The utility model relates to the technical field of cement grinding treatment, in particular to a cement grinding device with a multi-stage powder screening and selecting function, which comprises a grinding box and a screening mechanism, the grinding box comprises a feeding area, a first grading grinding area, a second grading grinding area and a discharging area, the grinding box is provided with the feeding area, and the screening mechanism is arranged in the discharging area. A first grading grinding area extends from the bottom of the inner side of the feeding area, a second grading grinding area is arranged at the bottom of the first grading grinding area, and a discharging area is arranged at the bottom of the grinding box; a scraping plate is arranged in the second grading grinding area, the screening mechanism comprises a screening plate arranged in the second grading grinding area, and the screening plate can be opened; the device solves the problems that in the prior art, when an existing device conducts grading treatment, dust is prone to being accumulated in the device, especially on a screening net, after the screening net conducts screening, the screening net and the interior of the device are inconvenient to clean, the efficiency is low during grading grinding, and the screening efficiency is affected.

The utility model provides a cement grinding mill roller press moving roller bearing seat which comprises a base, two anti-attrition plates are arranged on the upper surface of the base, mounting mechanisms are arranged between the anti-attrition plates and the base, and lubricating mechanisms are arranged between the base and the anti-attrition plates. The anti-attrition plate is made of a stainless steel material. By using the anti-attrition plate and the lubricating mechanism which are made of stainless steel, the stainless steel has excellent hardness and corrosion resistance, so that the integrity and stability of the structure can be kept in the environment of bearing huge extrusion force and frequent friction for a long time, equipment faults caused by material abrasion are effectively reduced, and the service life of the bearing seat is prolonged; meanwhile, in cooperation with a lubricating mechanism, the lubricating agent is injected into the oil injection pipe regularly, the lubricating agent can smoothly flow through the communicating groove and the oil hole and permeate into the oil groove in the surface of the anti-attrition plate, a layer of uniform lubricating film is formed, the friction coefficient is further reduced, the energy loss is reduced, and smooth operation between the action roller and the bearing seat is ensured.

The utility model discloses a cement grinding aid filling machine, which relates to the technical field of filling machines, and comprises a base, a tray is arranged at the top end of the base, a container barrel is arranged at the top of the tray, a filling hole is formed in one side of the top end of the container barrel, a vertical plate is fixedly connected to one side of the top end of the base, and the vertical plate is fixedly connected with the base. A transverse plate is fixedly connected to the top end of the vertical plate, an electric push rod is installed at the top end of the transverse plate, a vertical cylinder is arranged at the output end of the electric push rod, a cavity is formed in the vertical cylinder, and an exhaust pipe penetrates through one side wall of the cavity. By arranging a series of structures, the internal pressure of the filling barrel can be kept balanced with the external pressure, so that the probability that the container barrel is broken due to overlarge pressure during filling is reduced, the container barrel is not prone to toppling towards one side when being impacted by a pressurized high-speed cement grinding aid aqueous solution, and the service life of the container barrel is prolonged. Therefore, the container barrel can be kept in a stable state during filling.

The utility model relates to the technical field of ball mills, in particular to a low-energy-consumption ball mill for cement grinding, which comprises a ball mill body with a positioning opening on the surface, a retaining ring arranged in the ball mill body, a sealing plate arranged on the surface of the retaining ring, a support plate arranged on the surface of the retaining ring, a bottom plate arranged on the end face of the support plate, and a mounting plate arranged on the surface of the bottom plate. A fixed plate is arranged on the surface of the baffle, a shifting piece is arranged on the surface of the baffle, and a threaded groove is formed in the side face of the fixed plate; the ball mill has the beneficial effects that when the material blocking ring is seriously abraded during use, the sealing plate can be taken out from the ball mill body firstly, so that the material blocking ring can be directly taken out, then the seriously abraded baffles can be replaced, the baffles can be conveniently and specifically replaced by arranging the multiple sets of baffles, and therefore the situation that all equipment needs to be replaced is avoided; and the cost is reduced.

The invention relates to the technical field of cement production, and provides a cement particle size measuring system for cement grinding production, which comprises a material conveying pipe for conveying cement raw powder for cement grinding production, the bottom side of the material conveying pipe is fixedly connected with a frame body; the middle end of the front side of the frame body is fixedly connected with a plurality of screening detection cylinders for detecting the grinding granularity of the cement raw powder, the top sides of the screening detection cylinders are connected with sampling heads through connecting pipes, and the sampling heads are driven by a worm gear driven by a power assembly so as to carry out multiple times of quantitative sampling work on the cement raw powder in a conveying pipe; and the toothed plate triggers the screening work of the screening detection cylinder through the displacement of the sliding frame. The cement raw powder in the conveying process is sampled for multiple times, the sampling randomness is increased through the fluidity of the cement raw powder in the sampling process, and average data is obtained through multiple times of sampling, so that errors are reduced, and more real grinding particle size data of the cement raw powder are obtained.

The utility model belongs to the technical field of cement grinding mills, and particularly relates to a cement grinding mill partition plate which comprises a plurality of annularly distributed grid plates, grid gaps which are formed in the grid plates and are used for screening out crushed cement and ventilating the interior of a grinding mill, and a central circular plate which is used for connecting the plurality of grid plates, the central circular plate is composed of a plurality of ventilation holes distributed in the central circular plate, and filter screens are fixedly arranged in the ventilation holes and used for intercepting cement and only allowing airflow to pass through so as to dissipate heat in the mill; the intercepting part is spliced with the part, not provided with the grate seam, of the grate plate and used for blocking cement with the particle size larger than the size of the grate seam, heat in the mill is effectively dissipated, and therefore the ventilation efficiency and the heat dissipation performance of the mill are improved, seamless splicing of the intercepting part and the grate plate is achieved, and the heat dissipation performance of the mill is improved. The cement with overlarge particles is effectively prevented from entering the next bin, and the grinding quality and the production efficiency of the cement are ensured.