30results about How to "Reasonable particle gradation" patented technology

The invention discloses a high efficiency cement composite grinding additive, comprising the following raw materials by weight percent: 10-25% of calcined gypsum, 10-30% of calcined aluminite, 20-40% of sodium metasilicate, 2-4% of triethanolamine, 0.5-2% of polyacrylate, 0.5-3% of dispersant and 20-30% of zeolite powder. The preparation method of the high efficiency cement composite grinding additive comprises the following steps: first selecting raw materials, then dripping liquid raw materials-triethanolamine and polyacrylate TH-1100 with a liquid pump in zeolite powder, then preparing reinforced grinding component with a dry powder mixer, finally adding the reinforced grinding component, calcined gypsum, calcined aluminite, sodium metasilicate and dispersant in a kneader to mix for 20-30min and obtaining the product. The product has prominent grinding aid, and can increase the hourly output of mills by 10-15%, reduce the consumption of electricity, and increase the cement 3-day compression strength and the cement 7-day compression strength by more than 20% and the cement 28-day compression strength by 10-15%.

The invention relates to a high-performance cement expansive agent and a production method thereof. Aluminate expansive chamotte calcined at high temperature in a rotary kiln, other aluminum chamotte, anhydrite, desulfurized gypsum and polyalcohol ether (a reducing component) are mixed together according to a certain proportion to form the high-performance cement expansive agent. The production method comprises the following steps: firstly adding the blocky aluminate expansive chamotte into a vertical mill so as to pulverize the chamotte to a certain specific surface area; then adding the anhydrite, the desulfurized gypsum and the other aluminum chamotte together into a ball mill so as to pulverize the mixture to a certain specific surface area; and during the pulverizing in the ball mill, spraying the reducing component into the ball mill after atomizing the reducing component through a special device so as to evenly mix the components and obtain the finished product. Through the full use of the difference between the grinding performances of different mineral materials, the method compounds the recipe and carries out the process parameter control so as to realize the reasonable gradation of the particles. The high-performance cement expansive agent can reduce or avoid the problems that: a concrete structure produces harmful cracks due to early contraction, dry shrinkage and cold shrinkage, thereby bringing about structural leakage. The high-performance cement expansive agent can be used for continuous production, and has high compensation and contracting performance and convenient use.

The invention belongs to the technical field of building materials, and particularly relates to a high-anti-permeability cement-based repair material for tunnel engineering. The repair material consists of portland cement, coal ash, silica fume, steel slag powder, rock powder, tailing sand, quartz sand, attapulgite, acrylate emulsion, cellulose ether, polyacrylamide, PVA fibers, PET fibers, a polycarboxylic acid water reducer and a defoaming agent. The repair material has the characteristics of easy construction, good working performance, good water retention performance, high compressive strength, high anti-permeability level, high toughness and adhesion, excellent durability and the like; and the repair material can be suitable for construction initial protection or engineering later maintenance and repair of lining concrete in the tunnel engineering.

The invention provides high-strength gypsum-based self-leveling mortar. The gypsum-based self-leveling mortar comprises alpha hemihydrate gypsum and two types of mineral sand with different fineness.The invention also provides a preparation method of the high-strength gypsum-based self-leveling mortar. The method includes the following steps: evenly mixing the alpha hemihydrate gypsum, binding materials other than the alpha hemihydrate gypsum, the mineral sand with the different fineness and admixtures, adding the mixture to water, and respectively performing impregnating and stirring for a while. The gypsum-based self-leveling mortar prepared by the method has the strength as high as cement-based self-leveling mortar.

The invention discloses a cement grinding aid as well as a preparation method and an application method thereof. The cement grinding aid comprises the following raw materials in parts by weight: 5-15 parts of triethanolamine, 5-20 parts of honey, 1-5 parts of sodium gluconate, 1-5 parts of N-sulfo-glucosamine potassium salt, 5-10 parts of C1-C3 alcohol and 40-100 parts of water. The invention aims to provide the cement grinding aid that the grain composition of cement added with the cement grinding aid is reasonable after powdering, the fineness of cement is appropriately reduced, the strength of grinded cement can be improved, and the comprehensive effect is relatively good.

The invention relates to the field of composite materials, particularly an anticorrosion wear-resistant antiscour high-temperature-resistant silicon crystal composite material. The nano rare-earth silicon crystal anticorrosion wear-resistant material is prepared by mixing the following components in parts by weight: 100 parts of aggregate, 45-55 parts of powder, 45-55 parts of binder, 0.5-0.7 part of rare-earth and 8-12 parts of glass fiber. The invention adopts factory waste subjected to high-temperature smelting as the main material, so the material cost is low; by using the nano powder as the auxiliary material, the nano rare-earth silicon crystal anticorrosion wear-resistant material has the advantages of reasonable particle size distribution, closely packed particles, high product density and high interface binding strength; the rare-earth material and the inorganic material can effectively enhance the strength, hardness, temperature resistance, corrosion resistance, fire resistance and wear resistance of the nano rare-earth silicon crystal anticorrosion wear-resistant material; and the nano rare-earth silicon crystal anticorrosion wear-resistant material can be widely used in many industries, such as thermal power generation, cement construction materials, metallurgy, mining, chemical engineering, national defense and the like.

The invention discloses a liquid cement aid grinding reinforcing agent and a preparation method and application method thereof. The liquid cement aid grinding reinforcing agent is prepared from, by weight, 40-60 parts of triethanolamine, 0.1-5 parts of molasses, 1-10 parts of glycerinum, 0.1-5 parts of amphoteric polymers, 0.1-5 parts of sodium humate and 30-80 parts of water; PEO-b-PPO is adopted as the amphoteric polymers. According to the liquid cement aid grinding reinforcing agent, the early strength and later strength of cement which is added with the liquid cement aid grinding reinforcing agent after powder grinding is performed are both improved.

The invention discloses a high performance concrete composite mineral additive prepared from construction wastes. The additive comprises 1 to 99 wt% of powdery construction wastes and 1 to 99 wt% of active additive. According to the preparation method, the powdery construction wastes are mixed with at least one component of slag powder, steel slag powder, fly ash, silica fume, meta-kaolin powder, and limestone powder according to a certain ratio, and then the mixture is subjected to ultrafine powder processing. The provided high performance concrete composite mineral additive has the advantages of fineness, reasonable and continuous grain size gradation, and high activity. The prepared concrete containing the additive can meet or even exceed the standards of common high performance concrete.

The invention discloses a preparation method of a composite prefabricated part lining for a high-temperature lime rotary kiln, and belongs to the technical field of refractory material production equipment. The preparation method is characterized by comprising the following steps: (1) weighing and preparing raw materials; (2) putting the prepared raw materials into a material crusher in a classified manner, respectively crushing the raw materials into required particle sizes according to requirements, then uniformly mixing, adding water the weight of which accounts for 4-6wt% of the total weight of the raw materials, and uniformly stirring in an environment at the normal temperature of 5-25 DEG C; (3) pouring and molding the mixed material stirred by adding water in a model to obtain a blank; and (4) baking the blank at low temperature until the blank is shaped. The rotary kiln lining is prepared from the magnesium-chromium sand and the magnesium aluminate spinel, has the characteristics of high temperature resistance, corrosion resistance, good wear resistance and no ring formation, solves the problems that the high-temperature lime rotary kiln lining is not resistant to corrosionand short in scouring service life, and improves the production efficiency.

The invention belongs to the technical field of building materials, and specifically relates to a high-impermeability cement-based repair material for tunnel engineering, which is composed of Portland cement, fly ash, silica fume, steel slag powder, rock powder, tailings sand, quartz sand, Attapulgite, acrylate emulsion, cellulose ether, polyacrylamide, PVA fiber, PET fiber, polycarboxylate water reducer and defoamer. The invention has the characteristics of easy construction, good workability, good water retention, high compressive strength, high impermeability grade, high toughness, cohesiveness and excellent durability; the product of the invention can be applied to the construction of lining concrete in tunnel engineering Initial protection or post-project maintenance and repair.

The invention discloses an energy-saving and environment-friendly cement clinker preparation system, which includes a raw material preparation system, a raw material homogenization system, a fed raw material conveying system, a cement and pulverized coal preparation system and a cement clinker calcination system, wherein a material outlet of a loading bucket elevator is connected with a material inlet of a raw material homogenization air conveying chute; a material outlet of an unloading chain conveyer is connected with material inlets of two unloading bucket elevators respectively; a material outlet of a raw material feeding spiral conveyer is connected with a material inlet of a preheater; a material outlet of a spiral pneumatic conveying pump is connected with a material inlet of a decomposition furnace; a material outlet of another spiral pneumatic conveying pump is connected with a material inlet of a four-passage pulverized coal combustion device; a hot air outlet of an air-beam type grate cooler is connected with an air inlet of an air-swept coal mill; one material outlet of an electric tee scraper-trough conveyer and a material outlet of a kiln tail dust collection spiral conveyer are both connected with a material inlet of a re-homogenization loading chain conveyer. The system has the advantages as follows: the yield of the clinker is increased, the energy consumption is lowered, the emission is reduced, the quality of the clinker is improved, and the quality of the cement is stable.

The invention relates to a preparation method of an SMT (surface-mounted technology) adhesive, and belongs to the technical field of binding materials. According to the preparation method of the SMT adhesive, micro silicon powder is taken as packing for preparation of the SMT adhesive, does not easily react with other substances and does not chemically react with most acid and alkali, particles ofthe micro silicon powder uniformly cover the surface of an object and have higher corrosion resistance, tensile strength and compressive strength of a cured product can be enhanced, and wear resistance can be improved; besides, the micro silicon powder is high in purity, low in impurity content and stable in performance and can reduce exothermic peak temperature of an epoxy resin curing reaction,reduce linear expansion coefficient and shrink rage of the cured product and increase flame retardant property, so that the high-temperature resistance of the SMT adhesive is improved. By means of addition of talcum powder for preparation of the SMT adhesive, the talcum powder can be subjected to a chemical reaction with an organosilicon functional group in a silane coupling agent, silicon oxygenbonds with certain adhesive strength and protection force are formed, a coating can continuously bear certain heat load, high-temperature adhesive force is increased, and the high-temperature resistance of the SMT adhesive is improved accordingly.

The invention discloses a liquid cement grinding aid. The liquid cement grinding aid comprises the following components by weight percent: 10-24% of triethanolamine, 10-16% of polymeric polyol, 10-13% of molasses, 1-3% of calcium formate, 3-5% of sodium acetate, 5-10% of sodium thiosulfate and the balance water. Compared with the prior art, the liquid cement grinding aid has the advantages that the grain composition of a cement material is changed, the strength of cement is improved, enhancing effect of the cement mixed with a large quantity of limestone is improved obviously; the cost is lower as the using amount of triethanolamine is reduced; the cement output in the unit time is increased effectively, and the power consumption of per unit output is reduced as the mixing amount in the cement finishing process is low; the liquid cement grinding aid is green and environmental-friendly and cannot hurt people, or cannot damage buildings and the like as chloridion content is not contained.

The invention discloses an ash residue treatment method and an autoclaved brick manufacturing method, relating to the technical field of catalytic coal gasification and aiming at solving the problem of very low comprehensive utilization ratio of useful components in ash residue. The ash residue treatment method comprises the step of treating the ash residue to be treated by using a digesting agent and washing liquor. The autoclaved brick manufacturing method comprises the steps of pressing the ash residue treated by the ash residue treatment method into an autoclaved brick green body, and carrying out steam press maintenance on the autoclaved brick green body to obtain an autoclaved brick. The ash residue treatment method and the autoclaved brick manufacturing method have the beneficial effects that the ash residue is treated to obtain a catalyst and an autoclaved brick raw material in the ash residue, the autoclaved brick raw material is manufactured into an autoclaved brick, and the comprehensive utilization ratio of the useful components in the ash residue is improved.

A high-strength alkali-resistant castable prepared from coal gangue and a method thereof belong to the technical field of refractory castables. It is composed of coal gangue, silicon micropowder, coke gemstone micropowder, calcium aluminate cement, and admixtures. The particle size and mass percentage of each raw material are: coal gangue: 10% to 20% of particle size 5mm ~ 8mm, coal gangue: particle size 3mm ~ less than 5mm 10-25% of coal gangue: 20-30% of particle size 1mm-less than 3mm, coal gangue: 10-40% of particle size less than 1mm, burnt gem: 0-10% of particle size 5μm, silicon powder: 2-10% , Calcium aluminate cement: 5-15%, admixture: 0.1-0.4%. The invention has the advantages of fully utilizing the waste coal gangue resources, and the high SiO2 content in the coal gangue can prepare high-strength alkali-resistant castables with excellent alkali resistance and low price. This kind of castable can be widely used in the preheater and grate cooler of the new dry process cement rotary kiln system, where the alkali erosion is relatively serious and the thermal engineering is similar.

The invention discloses a liquid cement aid grinding reinforcing agent and a preparation method and application method thereof. The liquid cement aid grinding reinforcing agent is prepared from, by weight, 40-60 parts of triethanolamine, 0.1-5 parts of molasses, 1-10 parts of glycerinum, 0.1-5 parts of amphoteric polymers, 0.1-5 parts of sodium humate and 30-80 parts of water; PEO-b-PPO is adopted as the amphoteric polymers. According to the liquid cement aid grinding reinforcing agent, the early strength and later strength of cement which is added with the liquid cement aid grinding reinforcing agent after powder grinding is performed are both improved.

The invention discloses a compression-resistant and heat-preserving concrete. The raw materials include: cement, fine aggregate, coarse aggregate, and auxiliary materials; the cement includes aluminate cement and white cinder The cinder compound has a weight ratio of 200‑400:35‑65. The invention improves the thermal insulation performance of concrete, solves the problem of poor concrete thermal insulation that has been plagued for many years, and enhances the toughness and compressive strength of concrete, effectively enhances the mechanical properties of concrete, and makes the concrete quality stable and durable. And reduce the manufacturing cost of commercial concrete, improve the quality of commercial concrete, and further expand the overall competitive advantage.

The invention relates to the field of building concrete, in particular to a method for producing and manufacturing PHC pipe piles by using different grades of stone as raw materials. The method provided by the invention aims at optimizing the stone grades and comprehensively utilizing different grades of stone resources as raw materials for producing the PHC pipe piles. The method has the following effects that 1, in nowadays with reduced stone quality, spare resources and insufficient supply, the supply conflict can be relieved to a certain degree by exploring whether to reasonably match and use 0-5 stone and 1-3 stone in the PHC pipe pile production and comprehensively utilizing resources; 2, the production cost of the PHC pipe piles can be reduced through reasonably matching and using 0-5 stone and 1-3 stones and optimizing the concrete matching ratio; 3, the stone piling density and the particle grade are more reasonable by using different grades of stone and reasonably matching the use of the proportional 0-5 stone or 1-3 stone; the obtained concrete can ensure good workability of the mixture; the production process requirements can be met.

The invention discloses a cement grinding aid as well as a preparation method and an application method thereof. The cement grinding aid comprises the following raw materials in parts by weight: 5-15 parts of triethanolamine, 5-20 parts of honey, 1-5 parts of sodium gluconate, 1-5 parts of N-sulfo-glucosamine potassium salt, 5-10 parts of C1-C3 alcohol and 40-100 parts of water. The invention aims to provide the cement grinding aid that the grain composition of cement added with the cement grinding aid is reasonable after powdering, the fineness of cement is appropriately reduced, the strength of grinded cement can be improved, and the comprehensive effect is relatively good.

The invention relates to a preparation method for a microcrystalline alumina high-temperature rotary kiln inner lining, and belongs to the technical field of preparation of microcrystalline alumina and high-end aluminum refractory smelting materials. It is characterized by comprising the following steps: weighing raw materials, kneading, adding water and stirring, pouring and forming, and baking at low temperature to finalize the shape. The invention makes full use of corundum and mullite as main raw materials, and adds some additives as auxiliary raw materials to cast into prefabricated parts, and mainly solves the problem of high temperature resistance of refractory materials in the high-temperature alumina rotary kiln with harsh microcrystalline alumina calcination conditions and not being eroded and worn. , small volume change in hot and cold state, low service life of rotary kiln lining, etc., high-performance rotary kiln prefabricated lining is prepared. The rotary kiln prefab inner lining prepared by the invention has the characteristics of wear resistance, good corrosion resistance and small volume change under high temperature in the application in the new field of microcrystalline alumina calcination, and solves the problem of low life during use and frequent replacement of the inner lining. and other problems, correspondingly reduce labor intensity and improve production efficiency.

The invention belongs to the technical field of concrete additives, and particularly relates to a chloride-free cement grinding aid. The chloride-free cement grinding aid is prepared from raw materials in parts by weight as follows: 28-46 parts of alcohol amine compounds, 10-22 parts of alkylphenol ethoxylates, 10-16 parts of hexamethylene tetramine, 5-11 parts of N-acetylimidazole, 1-7 parts of polyethylene glycol and 1-7 parts of molasses. The chloride-free cement grinding aid does not contain chloride ion composition, is non-toxic, green, environment-friendly and non-corrosive, has no damage to a human body, a building and the like and has a good grinding-aid effect, output per machine-hour is increased, and energy consumption can be reduced.

The invention discloses a cement final grinding system based on a roller press. The cement final grinding system comprises the roller press, a material stabilizing bin, a V-shaped powder concentrator, an iron removal device, an elevator, a multi-rotor dynamic powder concentrator, a cyclone dust collector, a fan, a dust collector and a ball mill. A feed port of the elevator communicates with a belt conveying device from a cement distribution station, and a discharge port of the elevator is connected with a feed port of the V-shaped powder concentrator through the iron removal device. According to the cement final grinding system based on the roller press, by means of the roller press final grinding system taking the roller press and the multi-rotor dynamic powder concentrator as core equipment, reasonable finished product grain composition is guaranteed, then the quality of cement is guaranteed, meanwhile, through reasonable design of the technological process, the efficiency of the roller press is exerted to the maximum extent, and the yield is improved; and the material proportion of circulating grinding in the system is reduced, then energy consumption is reduced, part of equipment in an original ball mill grinding system is utilized, and the cost is controlled on the basis of increasing the yield and reducing consumption.

The invention relates to a solid material grinding method and a grinding machine. Solid materials enter a grinding body of a grinding room after being subjected to primary air classification, and are thrown onto a lining plate along the radial direction to be broken due to collision under the centrifugal effect of the grinding body in high-speed rotation; after rebounding from the lining plate, the broken materials oppositely collide newly-added materials to be broken; large-particle materials drop under the gravity effect and upwards enter a working cabin through a guide pipe after being subjected to high-speed hammering; the working bin has the functions of feeding and wind mixing elutriation; the materials subjected to wind mixing elutriation enter a classifier to be classified; finished material products achieving the granularity requirements are collected by a spiral collector and a bag-type dust remover and then are discharged from a finished product discharging device; and materials not achieving the granularity requirements are returned to the grinding room to be reground. The grinding machine has the beneficial effects that the grinding granularity is small, the grinding efficiency is high, the fine powder collecting effect is good, the equipment is compact in structure, the maintenance cost is low, powder bodies with the granularity in a range of 80-1,500 meshes can be produced, and the grinding machine has the advantages of high yield ad stable quality particularly when producing ultrafine powder with the granularity being greater than 800 meshes and materials with higher rigidity.

The invention discloses an application method of a bearing mortar coagulant prepared from coal gangue. A preparation method for the bearing mortar coagulant comprises the following steps: crushing coal gangue, carrying out dry grinding to obtain coal gangue powder with a particle size of 100-500 [mu]m, adding 20-30 parts by weight of the coal gangue powder, 150-160 parts by weight of water, 240-300 parts by weight of a grinding body and 0.01-0.05 part by weight of a surface passivator into wet grinding equipment, and conducting grinding for 40-60 minutes so as to obtain coal gangue slurry witha particle size of less than 0.3 [mu]m. The coagulant is applied to bearing mortar. The bearing mortar comprises 25-45 parts of ordinary Portland cement, 7-20 parts of water, 2-10 parts of the coal gangue coagulant, 40-60 parts of quartz sand, 0.1-0.25 part of a superplasticizer, 3-5.5 parts of an expanding agent, 0.03-0.2 part of a defoaming agent and 0.05-0.3 part of composite fibers. The earlystrength of the prepared bearing mortar can reach 22.9-24.8 MPa in 2 h, the later strength of the prepared bearing mortar can reach 70 MPa or above, the mortar does not shrink, and the fluidity of the mortar is improved by 40-60%.

The invention relates to a preparation method of a lining for a microcrystalline aluminum oxide high-temperature rotary kiln, and belongs to the technical field of preparation of refractory materials for microcrystalline aluminum oxide and aluminum high-end smelting. The preparation method is characterized by comprising the following steps: weighing raw materials, mixing, adding water and stirring, pouring and molding, and baking at low temperature until shaping. According to the invention, corundum and mullite are fully utilized as main raw materials, part of additives are added as auxiliary raw materials, and the prefabricated part is cast, so that the problems that a refractory material in a high-temperature aluminum oxide rotary kiln with harsh microcrystalline aluminum oxide calcination conditions is resistant to high temperature, not eroded and worn, small in hot and cold state volume change, short in service life of a lining of the rotary kiln and the like are mainly solved; and the high-performance rotary kiln prefabricated part lining is prepared. The prepared rotary kiln prefabricated part lining has the advantages of being good in abrasion resistance and erosion resistance and small in volume change at the high temperature in the new field of microcrystalline aluminum oxide calcination, the problems that in the using process, the service life is short, and the lining is frequently replaced are solved, the labor intensity is correspondingly reduced, and the production efficiency is improved.

The invention relates to a preparation method for a pellet rotary kiln lining without ring formation, belonging to the field of refractory materials. The preparation method is characterized by comprising the following steps: weighing of raw materials, mixing, water addition and stirring, pouring molding, and low-temperature firing until shaping is completed. The preparation method provided by theinvention fully utilizes titanium-iron alloy industrial by-products as raw materials, solves the problem of treatment of industrial solid wastes, realizes waste reutilization, and prepares a high-performance rotary kiln lining at the same time. The rotary kiln lining prepared by using the preparation method provided by the invention has the characteristics of good wear resistance and no ring formation, so the trouble of clearing rings in the process of application is solved, and production efficiency is improved.

The invention discloses a high efficiency cement composite grinding additive, comprising the following raw materials by weight percent: 10-25% of calcined gypsum, 10-30% of calcined aluminite, 20-40% of sodium metasilicate, 2-4% of triethanolamine, 0.5-2% of polyacrylate, 0.5-3% of dispersant and 20-30% of zeolite powder. The preparation method of the high efficiency cement composite grinding additive comprises the following steps: first selecting raw materials, then dripping liquid raw materials-triethanolamine and polyacrylate TH-1100 with a liquid pump in zeolite powder, then preparing reinforced grinding component with a dry powder mixer, finally adding the reinforced grinding component, calcined gypsum, calcined aluminite, sodium metasilicate and dispersant in a kneader to mix for 20-30min and obtaining the product. The product has prominent grinding aid, and can increase the hourly output of mills by 10-15%, reduce the consumption of electricity, and increase the cement 3-day compression strength and the cement 7-day compression strength by more than 20% and the cement 28-day compression strength by 10-15%.

The invention discloses a ceramic body pulverizing, granulating and drying method. The method comprises the process steps:1, breaking mineral aggregates into gravel raw materials with the sizes of less than or equal to 30mm and conveying the gravel raw materials with different components into different raw material tanks respectively; 2, conveying the gravel raw materials in the raw material tanks to a homogenizer for homogenization in proportion; 3, conveying the homogenized materials to a pulverizer for grinding and performing separation through a grader, wherein qualified fine powder of more than 200 meshes is collected by a pulse collector; 4, conveying the qualified fine powder into a granulator for making the powder into solid particles, wherein the solid particles meet the granulating requirements that the volume weight is 1,000-1,200g / l, the fluidization angle is 25-35b and the percentage of the particles of 40-60 meshes is more than 60%; and 5, conveying the qualified particles into a fluidization bed for drying, and discharging the particles. According to the method, the investment is 1 / 2 of that of wet granulation, the production cost is reduced by more than 1 / 2, production indexes are superior to those of drying tower granulation, the energy and water are saved, a technological process is simple, and the production cycle is short.

This invention discloses technique to increase yield and quality when it grinds the plant in open flow system, which is characterized in that, slow releasing solid grinding aid with cool water with pH value of 6~8 at temperature below 25Deg, preparing liquid grinding aid on field, and adding into grinder with controlled precise quantity. With the technique, it can increase whole effect 10~25% for three grinders; it can control precisely the hole sizer of fineness 4900 when residual is 1.5~5.0%, and the special surface area 320~450m2 / kg; the temperature when cement prepared can decrease 10~20Deg; it increases the special surface area with 10~40m2 / kg and early strength with 0.5~1.5MPa for same condition separately.