36results about How to "Extensive craft" patented technology

The invention discloses high-quality trace lubricant oil for near-dry cutting. The high-quality trace lubricant oil for near-dry cutting is composed of modified vegetable oil, synthesized ester, an extreme pressure anti-wear agent, a metal deactivator, a degradation accelerant and a natural oxidation inhibitor. The product is unconventional high-grade trace lubricant oil and ultra-strong in lubrication performance, and is mainly applied to a near-dry cutting machining process for the materials of steel, cast iron, aluminium alloy and the like.

The invention discloses an oxidized starch adhesive and a preparation method thereof. The oxidized starch adhesive is mainly prepared from the raw materials of, by weight, 100 parts of starch, 3-5 parts of hydrogen peroxide, 0.1-0.5 parts of a potassium permanganate solution, 0.4-1 part of s catalyst, 9-11 parts of sodium hydroxide, 1-3 parts of a crosslinking agent, 300-500 parts of water, and 0-0.5 parts of a defoaming agent. According to the invention, hydrogen peroxide and the potassium permanganate solution are both used as oxidizing agents, and cooperates to provide a synergistic effect in carrying out oxidization treatment upon the starch material. The oxidization speed is high, and the dose of oxidizing agent is low. The obtained oxidized adhesive has the advantages of high bonding strength, good stability, good gelling resistance, long storage time, short drying time, good environment friendliness, and low cost. The adhesive is nontoxic and harmless, and can be widely applied in the fields of papermaking, trademark, textile, and the like.

The invention provides a preparation method of a high-transparency easy-to-tear polylactic acid blow-molded film. The high-transparency easy-to-tear polylactic acid blow-molded film is composed of a mixture of polylactic acid (PLA), polyterephthalic acid-adipic acid-butanediol ester (PBAT), a plasticizer acetyl tributyl citrate, a lubricant ethylene bisstearamide, an opening agent erucyl amide anda nucleating agent white carbon black. The preparation method comprises the following steps: weighing PLA, PBAT, a plasticizer, a lubricant, an opening agent and a nucleating agent in proportion, adding into a mixer, uniformly mixing, adding from a feeding hole of a double-screw extruder, carrying out melt extrusion, water cooling, pelletizing and drying to obtain special modified polylactic acidfilm-blowing resin, and carrying out water cooling blow molding film formation by a film blowing machine through a down-blowing method to obtain the high-transparency easily-torn polylactic acid blow-molded film. According to the invention, the PBAT, the plasticizer, the lubricant, the opening agent and the nucleating agent have a synergistic effect, so that the tensile elongation at break of thepolylactic acid film can be effectively improved, the polylactic acid film has high transparency, the flat wrinkle-free easy-to-tear high-transparency complete biodegradable film is obtained, the tensile strength is as high as 54.6 MPa, and when the thickness of the film is 0.025 mm, the light transmittance reaches 94% or above and the haze reaches 5.3%; and the film has good mechanical properties and excellent transparency, and can replace PE, PP, PVC and other films.

The invention provides a polylactic acid (PLA) / poly(butylene succinate-butylene adipate) (PBSA) blown film and a preparation method thereof. The blown film comprises a mixture of PLA, PBSA, plasticizer diethylene glycol monobutyl ether adipate, a lubricant, a plastic lubricant and an antioxidant. The PLA, the PBSA, the lubricant, the plastic lubricant and the antioxidant are first mechanically mixed into a premix, the premix is added through a feeding port of a twin-screw extruder, meanwhile the plasticizer diethylene glycol monobutyl ether adipate is metered and added in through a liquid feeding port of the twin-screw extruder, modified polylactic acid blown film special resin is prepared by melt-extruding, water-cooling, pelletizing and drying, the modified polylactic acid blown film special resin is blown by a film blowing machine to form a transparent tear-resistant biodegradable film. The PBSA, the plasticizers, the lubricant, the plastic lubricant and the antioxidant can effectively increase the tensile elongation at break and tear strength of polylactic acid films, maintains the transparency of the polylactic acid, and solves the brittleness defects of the polylactic acid films. The polylactic acid (PLA) / poly(butylene succinate-butylene adipate) (PBSA) blown film has good mechanical properties and excellent transparency, and can replace PE, PP, PVC and the like for preparation of films and sheets.

The filter material with phosphor adsorbing and biological membrane hanging functions is prepared with flyash with CaO content of 5-20 % as material, and through stoving, sieving, mixing with water and small amount of curing agent via stirring, pelletizing in a high speed turntable pelletizer, and naturally cured for 2-7 days while spraying water to maintain the water content of 10-40 % to form the spherical filter material. The filter material has irregular rough surface with microporous structure for biological membrane to grow easily. The filter material has the advantages of fast absorbing phosphate in great amount, and eliminating SS, BOD and other soluble organic matter from sewage. The present invention may be used widely in water treating industry, especially in directly purifying rich nutrients water.

The invention provides a flame retardant for the filter paper of a filter and a preparation method and application thereof. The flame retardant comprises, by weight, 50 to 60 parts of ammonium polyphosphate, 40 to 45 parts of tritolyl phosphate, 20 to 30 parts of melamine, 60 to 65 parts of glycol and 180 to 220 parts of water. The flame retardant has the advantages of economic composition, a good flame retardation effect and long-lasting action. The preparation method is a traditional mixing and heated stirring method and has the advantages of simple process and a small amount of used equipment. The application of the flame retardant is as follows: three traditional methods consisting of electrostatic spraying, dip-coating and brush coating are utilized for coating the flame retardant on the surface of the filter paper of the filter so as to form a layer of flame retardant membrane, process temperature is 110 to 120 DEG C, and process time is 10 to 30 s. The membrane enables the filter paper of the filter to have good flame resistance and the service life of the filter to be prolonged accordingly.

The invention discloses a liquid fertilizer dedicated for flowers. The liquid fertilizer is prepared from the following raw materials: cow dung, pigeon manure, earthworm manure, bean product leftover, leftover in slaughter house, fermentation leftover, gulfweed, sea tangle, feather powder, Angel yeast, natto strain, sulfur bacteria, rhizobium, bacillus subtilis, compound enzyme, protease, orthoclase, bryozoatum, and dickite. The provided liquid fertilizer has the advantages of scientific formula, comprehensive nutrients, easy absorption, safety, and no toxicity, and is suitable for many fertilizing and planting modes. Organic raw materials are decomposed and fermented by enzymes, macromolecular substances are decomposed, the fertilizing effect is quick and long-lasting, the soil hardening is relieved, the stress resistance is enhanced, the happening rate of diseases and insects is reduced by 12.7%, the blossom period is prolonged by 16 to 18 days; the organic raw materials are all wastes, the environment is protected, the technology is simple, the preparation efficiency is high, the cost is saved by 24.2%; and orthoclase, bryozoatum, and dickite can balance the nutrients, improve the soil structure, improve the fertilizer utilization rate, and enhance the ornamental value of flowers.

The invention relates to a technique for preparing wollastonite ultrafine powder from calcium silicate hydrate. In the technique, dealkalied red mud-calcium silicate hydrate, which is generated in the technological process of treating aluminum-containing raw materials by an improved soda-lime sintering method, is used as the raw material. The technique comprises the following steps: putting calcium silicate hydrate into an impurity removal liquid prepared from sodium thiosulfate and oxalic acid, stirring to react at 50-90 DEG C for 40-120 minutes, and filtering the reaction slurry to obtain acalcium silicate hydrate impurity-removed filter cake; drying the calcium silicate hydrate impurity-removed filter cake at 110-400 DEG C for 30-120 minutes to obtain calcium silicate hydrate impurity-removed powder; and finally, calcining the calcium silicate hydrate impurity-removed powder at 850-950 DEG C for 30-120 minutes to obtain the product wollastonite ultrafine powder. The invention has the advantages of wide sources of raw material, low productive energy consumption, simple technological process, favorable product performance and high added value.

The invention discloses diaphragma juglandis tea and a preparation method thereof. The method comprises the steps of taking locally native diaphragma juglandis fructus and green tea for standby application; taking out diaphragma juglandis, removing crushed residue, and then performing dedusting, sterilization and drying treatment respectively; taking the green tea to perform sterilization and drying treatment; mixing the well treated materials which are, by mass percentage, 60-70% of diaphragma juglandis fructus and 30-40% of green tea; making the well mixed crude diaphragma juglandis into a powdery substance through mechanical smashing and screening; and bagging the smashed and screened powdery diaphragma juglandis tea, so that the bagged diaphragma juglandis tea is obtained. The diaphragma juglandis tea is convenient to carry and drink, raw material sources are extensive, and diaphragma juglandis fructus is effectively utilized and reasonably matched with the green tea to be made into a healthy beverage. The diaphragma juglandis tea is simple in process, is made into bagged tea and is suitable for being drunk at any time when users live at home, work and travel, and the diaphragma juglandis tea has a very high health care value for the human body.

The invention relates to a titanium carbide / polyaniline composite material and a preparation method thereof. The preparation method comprises the following steps: firstly, adding a two-dimensional layered nano material MXene-Ti3C2 into a hydrochloric acid solution, and uniformly dispersing to obtain a Ti3C2 mixed solution; then adding aniline into the Ti3C2 mixed solution, and uniformly dispersing to obtain a mixed solution, wherein the ratio of the aniline to the two-dimensional layered nano material MXene-Ti3C2 is (0.1 to 0.3)mL to (100 to 600)mg; at 0 to 5 DEG C, adding a catalyst into a mixed solution A drop by drop, carrying out stirring polymerization till the mixed solution is gradually changed from a transparent solution into a uniform black solution, and carrying out washing and drying to obtain the titanium carbide / polyaniline composite material. According to the preparation method, by low temperature stirring treatment at 0 to 5 DEG C, the PANI / Ti3C2 composite material is prepared, and the problem that Ti3C2 is easy to oxidize at high temperature is improved, and the composite material with a uniform load can be obtained.

The invention provides a lithium-sulfur battery diaphragm and a preparation method thereof. Carrageenan gel and a conventional diaphragm are compounded through an electrostatic spinning method to prepare the novel lithium-sulfur battery diaphragm, and the lithium-sulfur battery diaphragm has the advantages of being good in electrolyte wettability, resistant to high temperature, anti-flame and capable of effectively inhibiting the shuttle effect and growth of lithium dendrites, and the circulating stability and safety of a lithium-sulfur battery are improved; and meanwhile, the lithium-sulfur battery compound diaphragm has the excellent heat stability, can resist to high temperature, and can keep the normal work state in the high-temperature environment, the working temperature of the battery can be further increased substantially, and the safety of the battery can be further improved substantially. According to the method, the raw material cost is low, the technology is simple, and mass production is easy.

The invention relates to a prostacyclin analogue sustained release preparation, which belongs to a trace sustained release preparation technology. The prostacyclin analogue sustained release preparation contains a prostaglandin analogue, a sustained release material, a lubricating agent and other pharmaceutically accepted additives. A process comprises various simple and convenient granulation processes, including wet granulation, and the sustained release preparation which contains uniform content of main drugs and is released sustainably and stably in vitro is obtained by controlling critical process parameters. According to the prostacyclin analogue sustained release preparation, no organic solvent is used from the composition of the formula to the whole process preparation process; therefore, the prostacyclin analogue sustained release preparation is more environment-friendly and is suitable for wider crowds. Meanwhile, according to the prostacyclin analogue sustained release preparation, the problem that the physicochemical property of the main drugs is extremely unstable is solved, so that a patient can use the preparation more safely and more reliably.

The invention discloses diaphragma juglandis tea and a preparation method thereof. The preparation method of the diaphragma juglandis tea comprises the following steps of taking local native diaphragma juglandis and green tea for standby application; taking the diaphragma juglandis, removing debris, and respectively carrying out dust-removing, sterilizing and drying treatments; taking the green tea, and carrying out sterilizing and drying treatments; mixing the treated diaphragma juglandis and green tea according to the following percentage by mass: 60-70% of diaphragma juglandis, and 30-40% of green tea; performing mechanical pulverization on the mixed crude product of diaphragma juglandis tea, and carrying out sieving so as to obtain a powdered product; and then, bagging the sieved powdered product so as to obtain bagged diaphragma juglandis tea. The diaphragma juglandis tea provided by the invention is easy to carry, convenient for drinking, and wide in raw material sources. The diaphragma juglandis tea is a healthy drink prepared by effectively utilizing diaphragma juglandis with green tea in rational match; moreover, the preparation method of the diaphragma juglandis tea is simple in processes. In addition, the diaphragma juglandis tea is prepared into bagged tea beverages, so that the diaphragma juglandis tea is suitable for drinking at any time at home, at work and during travel; moreover, the diaphragma juglandis tea has very high health-caring values for the human body.

The invention provides a preparation method of a Ni3Al coating. Compared with a thermal spraying method, the preparation method of the Ni3Al coating has the advantages that the prepared coating is higher in density and free of oxidation phenomenon, and can meet the wear-resistant and anti-oxidation requirements under high-temperature service conditions; compared with a physical vapor deposition method, the prepared coating has the advantage of being wide in thickness range; compared with a co-deposition Ni-Al heating treatment method, the preparation method overcomes the defects that a co-deposition process is complex and high in porosity; and the coating prepared through the method is high in Ni3Al content, good in process reproducibility and suitable for industrial production and wide in range of base materials, and spraying can be conducted on most metal surfaces.

The invention discloses a method for improving foamability or emulsibility of sodium caseinate, which is characterized by adding gelatin A into a sodium caseinate solution, wherein the weight ratio of gelatin A to the sodium caseinate solution is 0.25-4, the total protein concentration of gelatin A and the sodium caseinate solution is 0.1-2% and the pH value is 3-9; by carrying out complex coacervation on the gelatin A and sodium caseinate, the method can effectively inhibit the instability aggregation phenomenon of sodium caseinate near an isoelectric point, improves the foamability, foam stability and emulsibility of sodium caseinate in a wide food pH range, and has the advantages of simple process operation, wide material sources, no chemical residue and easy popularization.

The invention discloses brown sugar green tea diaphragma juglandis health tea and a preparation method thereof. The preparation method comprises the following steps: taking local native walnut diaphragma juglandis, green tea and brown sugar for standby use; taking out the walnut diaphragma juglandis, removing shredded residues, respectively performing the dedusting, sterilizing and drying processing; taking the green tea, performing the sterilizing and drying processing; taking the brown sugar and drying, mixing the following processed materials by mass percent: 60%-70% of the walnut diaphragma juglandis, 30%-40% of the green tea, and 5%-10% of the brown sugar; mechanically pulverizing a mixed diaphragma juglandis tea crude product, and sieving to prepare a powdery substance; and packagingthe pulverized and sieved powdery diaphragma juglandis tea in a bag, to obtain the bagged diaphragma juglandis tea. The bagged tea beverage prepared by the method is suitable for drinking at any timein home, working and travelling, and has a very high health-care value to a human body.

The invention discloses a novel resistive random access memory and a manufacturing method therefor. The novel resistive random access memory comprises a silicon wafer substrate and a back electrode; asilicon dioxide protection layer is arranged on the silicon wafer substrate; a plurality of cylindrical concave holes are etched in the silicon dioxide protection layer; a resistive random dielectriclayer is positioned in the contact place between the concave holes and the silicon wafer substrate; a silicide layer is arranged on the resistive random dielectric layer; a metal diffusion preventionlayer is arranged on the silicide layer and on the circumferential inner wall corresponding to the concave holes; and a metal top electrode is arranged in the metal diffusion prevention layer. The resistive random access memory unit obtained in the invention has excellent and stable resistance conversion characteristic; and by virtue of introduction of the silicide layer, the potential barrier resistance between an upper electrode and the resistive random dielectric layer is lowered, and the resistive random dielectric layer is subjected to resistance conversion without being influenced by the upper electrode material, so that the stability of the memory unit is further improved.

The invention provides a polylactic acid resin combination which is characterized by comprising the following materials in part by weight: 100 parts of polylactic acid, 5-25 parts of toughening agent and 0.1-1 part of anti-oxidant, wherein the toughening agent is a butyl acrylate, ethyl acrylate and epoxypropyl methacrylate terpolymer which, as the toughening agent of the polylactic acid, can effectively improve brake elongation, shock strength and tensile strength of the polylactic acid and reduce the blend viscosity, and as a result, the polylactic acid having good comprehensive performance can be obtained. Meanwhile, the refraction index of the polylactic acid is 1.454 and is close to that of the butyl acrylate, ethyl acrylate and epoxypropyl methacrylate terpolymer. Therefore, as for the polylactic acid, the transparency is maintained, the rheological behavior is improved, and the processability of the polylactic acid is improved. The polylactic acid resin combination is suitable for various processing requirements.

The invention provides a PVC rare-earth composite heat stabilizer and a method for making the same. The heat stabilizer is a wool acid metal rare-earth soap stabilizer and has a general chemical equation of xRE.yCa.zZn.(OOCR)n or x'RE.y'Ba.z'Zn.(OOCR)n. The method for making the heat stabilizer comprises the following steps that: sodium hydroxide is dissolved into an ethanol water solution and isstirred as well as is condensed and flowed back, the melting common and braid wool acid is added to adjust the pH value and decrease the temperature; water, chlorination rare-earth salt solution and salt are added in sequence to be pumped, filtered, washed by ethanol and water, dried and grinded into a product. The stabilizer adopts the common and braid wool acid as the raw material, thereby having wide resources, low cost, reasonable and scientific preparation method and great maneuverability; the product is straw yellow powder and has good primary and long-term heat stabilization performance of PVC and good effects in the aspects of material process and mechanical performance, is nontoxic and protects the environment, and can be applied to the processing and forming aspects of PVC watersupply and drainage pipes and have evident social and economical benefits.

The invention discloses a novel resistive variable memory and a manufacturing method thereof, comprising a silicon wafer substrate, a back electrode, a silicon dioxide protective layer above the silicon wafer substrate, and several cylindrical recesses etched on the silicon dioxide protective layer. The contact between the cavity and the silicon wafer substrate is a resistive medium layer, above the resistive medium layer is a silicide layer, above the silicide layer and the inner wall of the corresponding cavity is an anti-metal diffusion layer, inside the anti-metal diffusion layer is Metal top electrode. The resistive variable memory cell obtained in the present invention has excellent and stable resistance transition characteristics. By introducing the silicide layer, the barrier resistance between the upper electrode and the resistive variable medium layer is reduced, so that the resistance transition of the resistive variable medium layer is not affected by the above. The influence of the electrode material further improves the stability of the memory cell.

The invention relates to a low-cost simple method for preparing clopidogrel free alkali. The method comprises the following steps: taking (S)-2-chlorophenyl glycine methyl ester as an initial raw material, and sequentially carrying out an N,N-bisubstitution reaction, a solid sodium methoxide intramolecular condensation reaction, a 1,2-dihalogenation ethyl acetate substitution reaction, a hydrogen sulfate mercaptolation reaction and sulfuric acid decarboxylation cyclization with methyl acrylate in a pot, thereby obtaining the clopidogrel free alkali. The clopidogrel free alkali is prepared by adopting a one-pot process, expensive raw materials such as thiopheneethanol or other thiophene derivatives are not used, the raw materials are low in price and readily available, the reaction process is simple and convenient, the process is safe and environment-friendly, and the method is suitable for industrial production.

The invention relates to a method for preparing a compound methanol gasoline additive, which is characterized in that the compound methanol gasoline additive has hydrotropy, anti-rubber swelling property, oxidation resistance, metal corrosion resistance and combustion-supporting property. The additive comprises 10-55% of methyl tert-butyl ether, 0.05-10% of BTA, 15-60% of isopropyl alcohol, 0.03-25% of p-toluidine, 0.02%-12% of octadecylamine and 0.1-15% of 2,6 di-t-butyl-p-cresol. When the additive is used, firstly the prepared additive is mixed with methanol, and then mixed with a certain proportion of base gasoline uniformly to obtain methanol gasoline fuel. No ash is generated after the methanol gasoline prepared from the compound additive is combusted, and the emission of harmful substances in the exhaust can be greatly reduced. The additive has good low-temperature stability and dynamic performance, the normal operation of the engine system can not be affected on the premise of not changing the structure of the engine condition. The compound methanol gasoline additive has wide sources of raw materials, simple process and easy popularization.

The filter material with phosphor adsorbing and biological membrane hanging functions is prepared with flyash with CaO content of 5-20 % as material, and through stoving, sieving, mixing with water and small amount of curing agent via stirring, pelletizing in a high speed turntable pelletizer, and naturally cured for 2-7 days while spraying water to maintain the water content of 10-40 % to form the spherical filter material. The filter material has irregular rough surface with microporous structure for biological membrane to grow easily. The filter material has the advantages of fast absorbing phosphate in great amount, and eliminating SS, BOD and other soluble organic matter from sewage. The present invention may be used widely in water treating industry, especially in directly purifying rich nutrients water.

The invention discloses a non-quenched-tempered high-strength steel plate resistant to large heat input welding and a manufacturing method thereof, and belongs to the field of low-alloy steel. According to the technical scheme adopted by the invention, the non-quenched-tempered high-strength steel plate resistant to large heat input welding is prepared from the following chemical components: Fe, C, Si, Mn, Ni, Nb, V, Ti, Ca, N, O and inevitable impurities, wherein in percentage by mass of the elements, 11.9-5.3C-0.91Mn-0.54Ni+0.46Si-0.73Nb+1.76V is greater than or equal to 9.92, and is smallerthan or equal to 10.68, and C / Nb+Ti / N is greater than or equal to 5.4, and is smaller than or equal to 6.9. The non-quenched-tempered high-strength steel plate has the beneficial effects that: the steel plate components are scientific and are reasonable in proportion, the process is easily controlled, performances of the produced steel plate are stable, comprehensive mechanical properties are excellent, low-temperature toughness of a welding heat affected zone during large heat input is excellent, welding efficiency is improved in a multiplying mode, energy consumption is relatively low, economical efficiency is good, the cost is low, industrial production is adapted, and the applied range is wide.

The invention discloses a non-quenched-tempered high-strength steel plate resistant to large heat input welding and a manufacturing method thereof, and belongs to the field of low-alloy steel. According to the technical scheme adopted by the invention, the non-quenched-tempered high-strength steel plate resistant to large heat input welding is prepared from the following chemical components: Fe, C, Si, Mn, Ni, Nb, V, Ti, Ca, N, O and inevitable impurities, wherein in percentage by mass of the elements, 11.9-5.3C-0.91Mn-0.54Ni+0.46Si-0.73Nb+1.76V is greater than or equal to 9.92, and is smallerthan or equal to 10.68, and C / Nb+Ti / N is greater than or equal to 5.4, and is smaller than or equal to 6.9. The non-quenched-tempered high-strength steel plate has the beneficial effects that: the steel plate components are scientific and are reasonable in proportion, the process is easily controlled, performances of the produced steel plate are stable, comprehensive mechanical properties are excellent, low-temperature toughness of a welding heat affected zone during large heat input is excellent, welding efficiency is improved in a multiplying mode, energy consumption is relatively low, economical efficiency is good, the cost is low, industrial production is adapted, and the applied range is wide.

The invention relates to a prostacyclin analogue sustained release preparation, which belongs to a trace sustained release preparation technology. The prostacyclin analogue sustained release preparation contains a prostaglandin analogue, a sustained release material, a lubricating agent and other pharmaceutically accepted additives. A process comprises various simple and convenient granulation processes, including wet granulation, and the sustained release preparation which contains uniform content of main drugs and is released sustainably and stably in vitro is obtained by controlling critical process parameters. According to the prostacyclin analogue sustained release preparation, no organic solvent is used from the composition of the formula to the whole process preparation process; therefore, the prostacyclin analogue sustained release preparation is more environment-friendly and is suitable for wider crowds. Meanwhile, according to the prostacyclin analogue sustained release preparation, the problem that the physicochemical property of the main drugs is extremely unstable is solved, so that a patient can use the preparation more safely and more reliably.

The invention provides a liquid fuel additive, a liquid fuel and a preparation method and application of the liquid fuel additive, and belongs to the technical field of fuels, and the method comprises the following steps: carrying out catalytic hydrogenation reaction and catalytic cracking reaction on resin acid substances. The fuel additive provided by the invention has the properties of high energy density, low pour point, good fluidity, good thermal stability and the like, and is mainly used in the field of aviation equipment.

The invention relates to a technique for preparing wollastonite ultrafine powder from calcium silicate hydrate. In the technique, dealkalied red mud-calcium silicate hydrate, which is generated in the technological process of treating aluminum-containing raw materials by an improved soda-lime sintering method, is used as the raw material. The technique comprises the following steps: putting calcium silicate hydrate into an impurity removal liquid prepared from sodium thiosulfate and oxalic acid, stirring to react at 50-90 DEG C for 40-120 minutes, and filtering the reaction slurry to obtain acalcium silicate hydrate impurity-removed filter cake; drying the calcium silicate hydrate impurity-removed filter cake at 110-400 DEG C for 30-120 minutes to obtain calcium silicate hydrate impurity-removed powder; and finally, calcining the calcium silicate hydrate impurity-removed powder at 850-950 DEG C for 30-120 minutes to obtain the product wollastonite ultrafine powder. The invention has the advantages of wide sources of raw material, low productive energy consumption, simple technological process, favorable product performance and high added value.

The invention provides an alkali-activated coal gangue powder geopolymer cementing material, which is prepared by mixing solid waste, a thermal insulation material, an alkali activator, a water reducing agent and water, wherein a mass ratio of the thermal insulation material to the solid waste is (0.3-0.6):1, a mass ratio of the alkali activator to the solid waste is (0.06-0.08):1, a mass ratio ofthe water reducing agent to the solid waste is (0.007-0.01):1, a mass ratio of the water to the solid waste is (0.3-0.6):1, the solid waste is composed of coal gangue powder, fly ash and boiler slagaccording to a mass ratio of (1-5):(0-7):(0-5), and the thermal insulation material is composed of vitrified micro-beads, expanded perlite and perlite powder according to a mass ratio of (5-10):(0-5):(0-3). The invention also provides a preparation method of the alkali-activated coal gangue powder geopolymer cementing material.