32results about How to "Solve easy pulverization" patented technology

The invention discloses an A1-grade fireproof insulation mortar which is prepared from the raw materials of, by weight: common Portland cement, fly ash, expanded vermiculite, expanded glass micro-beads, re-dispersible latex powder, fiber, cellulose ether, and an air-entraining agent. According to the invention, glass micro-beads are adopted as a light aggregate, and the expanded vermiculite with excellent fireproof performance is doped in. Compared with a dry-mix insulation mortar light aggregate with expanded perlite and polystyrene particles, the defects of high water absorption, easy pulverization, high volume shrinkage rate in slurry stirring, and phenomena of product low post-stage strength and hollowing cracking, and the like of expanded perlite are overcome. Also, defects of high inflammability, poor fire retardant performance, harmful gas production under high temperature, low aging resistance, low weather resistance, high resilience during construction, and the like of organic materials such as EPS and XPS are overcome. With the mortar provided by the invention, insulation mortar comprehensive performances and construction performance are improved. On the basis of good safety, energy-saving and comfortableness are realized. With the mortar, building, human, and nature are harmonious and unified.

The invention discloses a vitrified particular heat-insulated material for walls, belonging to the field of construction materials. The vitrified particular heat-insulated material for the walls comprises the following components in parts by weight: 100-150 parts of vitrified micro particle, 30-50 parts of expanded perlite, 30-60 parts of cement, 30-60 parts of sodium silicate, 1-10 parts of a hardener, 1-10 parts of a hydrophobic agent and 1-10 parts of a penetrant. The vitrified particulate heat-insulated material for the walls has the advantages of high density, high compressive resistance, low thermal conductivity, good heat-insulated effect and the like, has fire-protection rating A, and is a fireproof and heat-insulated material with excellent comprehensive performance.

The present invention provides a means to express superior dispersibility and to be easily pulverized in the polycarboxylic acid type cement dispersant. The purpose is attained by a powdery cement dispersant having, as a main component, a polycarboxylic acid type copolymer having a repeating unit (I) derived from an unsaturated polyalkyleneglycol type monomer, a repeating unit (II) derived from an unsaturated carboxylic acid type monomer and a repeating unit (III) derived from a branched compound having a branched structure containing 3 or more polyalkyleneimine chains or polyoxyalkylene chains in a molecule, or a powdery cement dispersant comprising a polycarboxylic acid type copolymer (A) having a repeating unit (IV) derived from an unsaturated polyalkyleneglycol type monomer and a repeating unit (V) derived from an unsaturated carboxylic acid type monomer and a branched compound (B) with a branched structure containing 3 or more polyalkyleneimine chains or polyoxyalkylene chains in a molecule.

Disclosed is an inorganic heat-insulation fireproof plate, namely a silica bead fireproof heat-insulation plate. The fireproof plate is made of vitrified small balls and xonotlite, the weight ratio of the vitrified small balls to the xonotlite ranges from 1:2 to 1:5, in addition, waterproof materials with the weight ranging from 1% to 5% of the total weight of the fireproof plate and gel materials with the weight ranging from 8% to 10% of the total weight of the fireproof plate are added, and the fireproof plate is manufactured via working procedures including preparation, screening, pressure forming and drying. The vitrified small balls replace traditional common expanded perlite and traditional common polyphenyl particles to be used as lightweight aggregates of dry mixed heat-insulation mortar, shortcomings that the expanded perlite is high in water absorption and easy in pulverization and is high in volumetric shrinkage during slurry stirring, accordingly, low long-term strength, hollowing and cracking of a product are caused easily, and the like are overcome, defects of flammability, poor fireproof performance, harmful gas generation at a high temperature, low ageing resistance and weather fastness, high rebounding during construction and the like of the polyphenyl particles are also overcome, and comprehensive performances and construction property of the heat-insulation mortar are improved. In addition, the hydrophobic vitrified small balls cannot be degraded at a high temperature and are not easy to deform, and the flame retardant property of a polymer can be improved when the vitrified small balls are used as filling materials of the polymer.

The invention discloses a special primer-topcoat polyurea protection coating for an automobile chassis system and a preparation method. The coating is prepared from a component A and a component B in a volume ratio of 1:(2-4), wherein the component A comprises isocyanate, a poly-sulfide modified epoxy resin and a diluent; the component B comprises an aliphatic synthetic hindered amine polyurea resin, a coloring pigment, a filler, graphene pulp, organic zinc, a dispersing agent, an ultraviolet absorbent, an ultraviolet light stabilizer, an anti-settling agent, a leveling agent, a defoaming agent, extinction powder and a dissolvent. The invention further discloses a preparation method of the special primer-topcoat polyurea protection coating for the automobile chassis system. The thickness of a disposable coating membrane is greater than or equal to 80mu m, a coating membrane is rapid in drying speed and high in construction efficiency, a coated layer is good in adhesion to a substrate, good in impact resistance, free of color change in long-term outdoor exposure, very good in aging resistance, salt mist resistance and medium resistance, high in product solid content and good in environmental friendliness, and the method provided by the invention is simple in process, low in cost and applicable to industrial production.

The invention discloses a low-temperature SCR denitration catalyst and a preparation method thereof, and belongs to the technical field of low-temperature SCR denitration. According to the method, an FCC waste catalyst and modified biochar are used as supporting carriers, transition metal oxides are used as active components, the loading amount of transition metal elements in the components is 5-20% of the weight of the carriers, the active components are loaded on the carriers by adopting an impregnation method, then drying treatment is performed, and finally roasting is performed in a nitrogen atmosphere, and the low-temperature SCR denitration catalyst disclosed by the invention is obtained. The problems of low low-temperature denitration activity and high cost of a vanadium-titanium catalyst are solved, resource comprehensive utilization of the FCC waste catalyst is achieved, damage of industrial solid waste to the environment is reduced, and the prepared SCR catalyst has excellent denitration performance under the low-temperature condition and has good application prospects and market prospects for low-temperature denitration of industrial flue gas.

The invention provides a preparation method of a carbon fiber insulation hard felt, comprising the steps of A) performing sequential steps, to be specific, chopping carbon fibers, heating for pretreatment, carding and opening, layering, and compositing by needle punching to obtain a unit layer; B) gluing the unit layer many times, and drying to obtain a treated unit layer; C) applying glue among the multiple unit layers treated, and stacking and spreading to obtain a composite unit layer; stacking and spreading protective layers to the uppermost and lowermost layers of the composite unit layer respectively, hot-pressing, and carbonizing to obtain the carbon fiber insulation hard felt; a heating procedure in carbonizing refers to: heating to 1000 DEG C at heating rate of 20-50 DEG C/h; heating to 1500 DEG C and above at heating rate of 30-70 DEG C/h. The preparation method of the carbon fiber insulation hard field provided herein integrates the carbonizing and high-temperature procedures of the prior art, so that the production cycle is shortened, and process stability and product quality stability can also be improved.

The invention provides a high-weather-resistance coiled material coating composition, which comprises the following components in percentage by mass: 30-80% of polyester resin, 10-20% of a curing agent, 1-10% of a curing agent, 1-10% of a curing agent, 1-10% of a curing agent and 1-10% of a curing agent. 2-15% of amino resin; 4-10% of a curing agent; 1-3% of an adhesion promoter; 1-5% of an auxiliary agent; and the balance of a solvent, wherein the polyester resin is saturated polyester resin, the number-average molecular weight Mn of the polyester resin is 3000-20000, the hydroxyl value of the polyester resin is 30-70 mg KOH/g, the acid value of the polyester resin does not exceed 10 mg KOH/g, and a molecular chain of the polyester resin contains a neopentyl structure. The high-weather-resistance coiled material coating composition does not need pretreatment, can be directly coated on a metal substrate such as stainless steel and the like, and has excellent machinability and adhesive force, meanwhile, a cured paint film has excellent weather resistance, pollution resistance, MEK resistance, corrosion resistance and wear resistance, and the high-weather-resistance coiled material coating composition is mainly applied to external coating of metal coiled materials such as stainless steel and the like.

The invention discloses an adsorption material applicable to an adsorption type air dryer and a combined adsorption method of the adsorption material. The absorption material is formed by aluminum oxide and molecular sieves with different particle diameters in a sectional combining manner so as to form a composite absorption material combination body, wherein the aluminum oxide comprises two types of absorption particles with particle diameters being phi3 to phi5mm or phi5 to phi8mm; the molecular sieves also comprise two types of absorption particles with the particle diameters being phi3 to phi5mm or phi5 to phi8mm; the aluminum oxide and the molecular sieves with the different particle diameters are staggered, layered and packed in an absorption cylinder of the absorption type air dryer and combined to form a composite absorption material combination body; compressed air output by the absorption type air dryer is absorbed by the composite absorption material combination body which is combined and formed by the aluminum oxide and the molecular sieves with the different particle diameters.

The invention relates to a method for preparing magnesium oxide fibers by a ligand analysis technology. The method comprises the following steps: putting fully dried magnesium oxide precursor fibers into an alkaline gas, alkaline steam or/and water vapor atmosphere, performing ligand analysis treatment under a condition that the temperature is higher than 100 DEG C, and performing dissociation reaction on the magnesium oxide precursor fibers to generate magnesium hydrate; enabling magnesium hydrate to be shrunk to form the magnesium oxide fibers. By the ligand analysis technology, the technical difficulties that the fibers are easy to pulverize and difficultly formed are solved; by an optimized thermal treatment program, the mechanical property of the magnesium oxide fibers can be effectively enhanced.

Method of manufacturing resin particles capable of manufacturing resin particles of controlled particle size stably and efficiently by removing bubbles from the surface of a molten kneaded product as the raw material for resin particles thereby sufficiently ensuring action sites for a surfactant on the surface of the molten kneaded product, is provided. The method includes a coarsely-pulverizing step of pressurizing a mixture of a molten kneaded product containing a synthetic resin and an aqueous medium containing a surfactant to 15 MPa to 120 MPa thereby removing bubbles attached to the molten kneaded product containing the synthetic resin, and a finely-granulating step of finely granulating, by a high pressure homogenizer method, an aqueous slurry containing coarse particles of a molten kneaded product passing through a pressure proof nozzle in the coarsely-pulverizing step and in a state where bubbles attached to the surface are removed.

The invention belongs to the field of inorganic nonmetallic materials, and discloses a method for using calcium sulfate dihydrate to rapidly prepare a short cylindrical calcium sulfate hemihydrate material. The initial structure of common calcium sulfate dihydrate after being processed recrystallizes, the crystal grows to be complete without the problem of shrinkage cavity, and the prepared shortcylindrical calcium sulfate hemihydrate material has the high using value. By means of different energy possessed by different crystal faces of the crystal, calcium sulfate dihydrate controls dissolution and recrystallization speed of crystal faces in different solution systems according to differences of energy of each crystal face, and accordingly growth behavior control of the short cylindricalmaterial is completed. The method comprises the steps of grinding of calcium sulfate dihydrate, material distribution, thermal solution reaction, separation and cooling. The method can not only effectively solve the problems that calcium sulfate dihydrate is easy to pulverize, the strength is poor, and the stability is low, but also can widen the application field of calcium sulfate, and has theimportant practical meaning on high-efficiency utilization of smoke desulfurized products and gypsum resources.

A method of making a rare earth magnet containing zero heavy rare earth elements includes a step of mixing the fine grain power with the lubricant having a weight content of at least 0.03 wt. % and no greater than 0.2 wt. % for a period of between 1 and 2 hours. The step of pulverizing is further defined as jet milling the alloy powder with the lubricant using a carrier gas of argon or nitrogen. The method further includes a step of controlling oxygen content during the steps of melting, forming, disintegrating, mixing, pulverizing, molding, and sintering whereby the impurities including Carbon (C), Oxygen (O), and Nitrogen (N) satisfies 1.2C+0.6O+N≦2800 ppm. A rare earth magnet composition including C, O, and N whereby C, O, and N satisfies 1.2C+0.6O+N≦2800 ppm and has zero heavy rare earth elements.

The invention relates to a light weight thermal insulation dry-mixed mortar, which comprises following raw materials in parts by weight: 20 to 40 parts of cementing material, 60 to 80 parts of light weight aggregate, and 0.5 to 1.5 parts of high performance polymer additive; wherein the cementing material comprises following raw materials in parts by weight: 20 to 40 parts of fly ash and 60 to 80parts of cement; the light weight aggregate is pitchstone vitrified micro beads; and the high performance polymer additive comprises following raw materials: organic silicone resin, hydroxypropyl methyl cellulose ether, VAE dry powder, polycarboxylic acid water reducer dry powder, and an early strength agent. The light weight thermal insulation dry-mixed mortar has the advantages of light weight,thermal insulation property, good fireproof performance, good caking property, good bleeding resistance, aging resistant property, green, environmental friendliness, resistance to biological biting, prolonged service life, high strength, high flexibility, and strong cracking resistant performance.

The invention discloses a deoxidizing agent for steelmaking, which contains 40% to 70% of aluminum, 0.5% to 20% of tungsten and/or molybdenum, the remaining are iron and unavoidable impurity. The alloy solves the problem of easy pulverization of current aluminum matrix complex deoxidizer.

The invention discloses a glass bead wall thermal insulation material with good fireproof performance in the field of building materials. The glass bead wall thermal insulation material with good fireproof performance comprises 100-150 parts of glass beads, 30-50 parts of talcum powder, 30-60 parts of cement, 30-60 parts of sodium silicate, 1-10 parts of curing agent, 1-10 parts of water repellentand 1-10 parts of penetrating agent. The glass bead wall thermal insulation material with good fireproof performance has the advantages of being high in density, high in compressive strength, low inheat conduction coefficient, good in heat preservation effect and the like, the fireproof grade is grade A, and the material is a fireproof thermal insulation material with excellent comprehensive performance.

The present invention discloses modified ammonium sulfate which is prepared from ammonium sulfate, bentonite, paraffin, and 3,4-dimethylpyrazole phosphate. According to the present invention, the modified ammonium sulfate has higher mechanical strength, reduces caking and powdering, reduces ammonia volatilization, increases a utilization rate after application in farmlands and solves the problem that common ammonium sulfate produces irritating odour after been heated in storage and in use.