128 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 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 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 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 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 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 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 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 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 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 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.

The utility model relates to the technical field of cement production, and discloses a ground cement cooling device of a cement grinding mill. The ground cement cooling device of the cement grinding mill comprises a bottom plate, a supporting rod is fixedly installed above the bottom plate, a limiting pipe is fixedly installed above the supporting rod, a feeding port is fixedly formed in the upper portion of the limiting pipe, a limiting frame is fixedly installed at the left end of the limiting pipe, a driving pipe is movably installed in the center of the limiting pipe, and the driving pipe is fixedly installed at the left end of the limiting pipe. The heat conduction area between the heat pipe and air flow can be increased through the heat dissipation fins, the air flow is generated between the heat dissipation fins through the fans on the front side and the rear side, heat of the heat pipe is taken away through the air flow, and therefore water in the water tank can be rapidly cooled; the temperature difference between the cement and the circulating water is too small, so that the heat conduction efficiency is influenced, and the cooling effect is influenced, which are caused by too high temperature of the circulating water discharged out of the water tank due to long-time operation, is avoided.

The application provides a cement cost determination method and device, electronic equipment and medium, and relates to the field of cement.The method comprises the following steps: obtaining target proportions of component cement ingredients according to each proportion constraint interval of the component cement ingredients and a preset proportion target; and determining the cement cost according to the target proportions of all component cement ingredients and the unit price of each component cement ingredient, in the case that a target particle size distribution of the target proportions meets a preset particle size distribution constraint interval, a target cement fineness of the target proportions meets a preset cement fineness constraint interval, and a target cement strength of the target proportions meets a preset cement strength constraint interval.The application seeks an optimal cement grinding ingredient scheme by taking the following conditions as constraints: suitable cement particle size distribution composition, lowest cement comprehensive cost, and lowest cement quality meeting standard requirements, so as to reduce the cement cost while ensuring that the constraints are met.

The utility model relates to cement processing technical field, and disclose a kind of cement grinding aid atomizing device, including connecting pipe, first shell and second shell, the second shell is arranged in the inside of first shell, the connecting pipe is fixedly connected in the end of first shell, the inner wall of first shell is fixedly connected with connecting ring, the second shell is fixedly connected in the inner wall of connecting ring, the top of first shell is fixedly connected with gas pipe, the gas pipe extends to the gap of first shell and second shell place. The utility model provides that the sliding fit of sealing piston and sealing seat forms dynamic sealing structure, when there is no air pressure, spring pushes sealing piston and press tightly and is set on the sidewall above sealing seat located bar-shaped mouth, blocks grinding aid passage, prevents leakage, when gas pipe is passed into compressed air, air pressure exceeds spring pre-tightening force, sealing piston moves and opens passage, realizes the automatic control of air pressure drive and sealing opening.

The invention discloses a biogas waste liquid cement grinding aid and a preparation method thereof, and belongs to the technical field of cement grinding aids. The biogas waste liquid cement grinding aid comprises the following components in parts by mass: 100 parts of biogas waste liquid and 1-2 parts of sodium formate. The preparation method comprises the following steps: adding sodium formate into the biogas waste liquid, and stirring for activating reaction to obtain the biogas waste liquid cement grinding aid. The grinding aid realizes resource utilization of the biogas waste liquid, is energy-saving and environment-friendly, has the characteristics of no toxicity, no corrosion and no side effect, and has no adverse effect on the durability of concrete.

The invention relates to the technical field of cement grinding mills, in particular to a cement grinding mill with a proportioning mechanism, which comprises a machine body and a feeding mechanism mounted at a feeding hole of the machine body: a proportioning assembly is fixedly mounted above the feeding mechanism through a bracket; wherein the proportioning assembly comprises a material bin, the inner side of the material bin is divided into a raw material bin and an auxiliary agent bin through a partition plate, and hoppers are communicated with the lower side of the raw material bin and the lower side of the auxiliary agent bin. The feeding self-locking principle is formed, the problems that the raw materials and the dry fly ash are mixed in the feeding process and the matching amount is difficult to control are solved, the control principle is simple, feeding of the raw materials and the dry fly ash can be controlled respectively, the action stability can be guaranteed through the same control source, and the working efficiency is improved. And secondly, the weighing bin is arranged, so that accurate proportioning of the raw materials and the dry fly ash can be realized.

The utility model relates to an improved cement grinding system which comprises grinding equipment and powder selecting equipment, and a powder collecting channel is communicated with the grinding equipment and the powder selecting equipment and is used for collecting powder from the powder selecting equipment by the grinding equipment; the powder feeding channel is communicated with the grinding equipment and the powder selecting equipment and is used for feeding powder to the powder selecting equipment by the grinding equipment; the powder collecting channel comprises a discharging articulated chute for conveying powder, and the discharging articulated chute is provided with a screen and used for screening out fine powder smaller than meshes of the screen from the powder fed into the grinding equipment. According to the utility model, the screen is arranged in the material receiving channel between the grinding equipment and the powder selecting equipment, so that fine powder which is not screened out by the powder selecting equipment is removed again before entering the grinding equipment, and the residual fine powder is prevented from continuously entering the grinding equipment to participate in grinding operation. Due to the fact that fine powder which is small in particle size and not suitable for the working state of the grinding equipment does not exist in the grinding operation, the working condition of the grinding equipment can be closer to the ideal state, the working efficiency of the grinding equipment is improved, and the yield of the grinding procedure is improved.

The application provides a cement grinding aid, a preparation method and application thereof, and belongs to the technical field of cement. NH2-UiO-66 is prepared, MA-NH2-UiO-66 is prepared by reacting with maleic anhydride, monomer 1 prepared from maleic anhydride and diethanolamine, monomer 2 prepared from maleic anhydride and diol, and silane coupling agent and allyl polyoxyethylene ether are polymerized to prepare the cement grinding aid. The cement grinding aid prepared by the application not only can improve the cement particle distribution, stimulate the hydration dynamics, improve the early strength and late strength of cement and the like, but also is beneficial to improving the grinding process in the cement production process, and has important roles in reducing energy consumption and improving energy use efficiency, and has wide application prospects.

The invention belongs to the technical field of dust collection equipment, and particularly relates to a dust collection device for cement grinding aid production, which comprises a dust collection main body, a partition plate is fixedly connected in the dust collection main body, and cloth bag devices detachably connected with the partition plate are uniformly distributed on the partition plate; the cloth bag device is detachably connected with a connecting seat provided with a through hole, the connecting seat is fixedly connected with an elastic net, and the elastic net is connected with a cloth bag; a plurality of extrusion plates for extruding the elastic net are uniformly distributed in the elastic net along the circumference, the movement directions of the extrusion plates are close to and far away from the central shaft of the connecting seat, and the movement directions of the adjacent extrusion plates are opposite; the dust collecting main body is provided with a pulse dust cleaning structure for cleaning dust of the cloth bag; the dust collection device for cement grinding aid production integrates mechanical dust removal and pulse gas dust removal, and the problem that an existing dust collection device for cement grinding aid production is poor in dust removal capacity is effectively solved.

The utility model relates to the technical field of partition plates, in particular to a cement grinding mill partition plate structure which comprises a supporting circular plate, first screen holes are formed in the supporting circular plate, a plurality of sets of partition strips are fixedly connected to the outer portion of the supporting circular plate, a sector plate is arranged between every two adjacent partition strips, second screen holes are formed in the sector plates, and the first screen holes are communicated with the second screen holes. The fan-shaped plate is installed on the supporting circular plate, a positioning opening is formed in one side of the top of the fan-shaped plate, a positioning groove is formed in the top of the partition strip, a positioning ring is arranged on the positioning opening and the positioning groove, and the positioning ring is detachably and fixedly connected with the supporting circular plate. The position of the fan-shaped plate can be locked, when the fan-shaped plate needs to be replaced and maintained, only the positioning ring needs to be taken down, the fan-shaped plate can be quickly separated, and operation is convenient.

The present application relates to the technical field of cement grinding control, and particularly relates to a cement grinding parameter adjustment method and system based on particle size distribution, which can improve the quality control ability and efficiency in the cement production process, and reduce the production cost and environmental impact; the method comprises the following steps: collecting a cement grinding production sample in real time, and performing a screening test on the production sample to obtain real-time particle size distribution data of the cement grinding; calculating the error between the real-time particle size distribution data and preset target particle size distribution data to obtain a particle size distribution error vector; obtaining a plurality of particle size distribution error vectors according to a preset frequency; aligning the error values of the same particle size at different time points in the plurality of particle size distribution error vectors to the same column, aligning the error values of each particle size at the same time point to the same row, and arranging in time sequence to obtain a cement grinding particle error feature matrix; and inputting the cement grinding particle error feature matrix into a pre-constructed particle size distribution error analysis model.

The invention discloses an anti-corrosion cement grinding aid and a preparation method thereof, and belongs to the technical field of cement environment-friendly material processing. The anti-corrosion cement grinding aid comprises water, inorganic components, alcohol amines, alcohols, other organic matters, a cement metal ion catalyst and graphene dispersion liquid. The preparation method comprises the following steps: mixing and dissolving water and inorganic components, sequentially adding alcohol amines, alcohols, the cement metal ion catalyst and other organic matters, fully stirring and uniformly mixing, finally adding graphene dispersion liquid, uniformly stirring to form a uniform system, and detecting to ensure that the system meets the standard. According to the grinding aid, through the synergistic effect of all the components and uniform dispersion of graphene, the grinding efficiency, the early strength of cement and the slump retaining performance are effectively improved, the hydration temperature peak is delayed, and complete hydration is promoted. The cement additive is adjustable in component proportion, adapts to different cement types, does not need equipment transformation, has no pungent smell, and has the characteristics of high efficiency and environmental protection.