97results about How to "Washout" patented technology

The invention provides a slide plate brick for slag stopping of a converter. The slide plate brick is produced from, by mass, 45-60% of tabular corundum, 10-30% of zirconia mullite, 6-14% of alumina micro-powder, 4-10% of metallic aluminum powder, 2-8% of silicon carbide, 1-3% of clay, 1-3% of carbon black, 0.5-1.5% of boron carbide, 0.5-1.5% of aluminum fibers and 4-6% of a composite resin binder. The slide plate brick for slag stopping of the converter is produced through selecting specific kinds and proportions of the raw materials without high temperature calcination, can be used multiple times, and has good resistance to corrosion, scour, oxidation and thermal shock.

The invention discloses a preparation method of a superlight closed-pore ceramic, belonging to the technical field of inorganic nonmetallic materials. The superlight closed-pore ceramic comprises the following raw materials by weight percent: 5%-60% of ceramic particles, 0.01%-5% of a foaming agent and the balance of water. The preparation method comprises the steps of mixing the ceramic particles and a long-chain surfactant with the water according to a ratio to obtain granular stable foam; directly drying the foam, and sintering at high temperature to obtain the superlight closed-pore ceramic. The superlight closed-pore ceramic is uniform in pore, high in closed porosity, low in density and high in strength, and is suitable for preparing foam ceramic materials with different sizes and complicated shapes. In addition, the superlight closed-pore ceramic is relatively high in strength and relatively low in volume density and heat conductivity coefficient; the preparation method has the characteristics of low cost, simple process, environmental friendliness and the like, and has wide application prospects.

The invention discloses a carbon-free ladle brick and a preparation method thereof. The carbon-free ladle brick is prepared by using bauxite chamotte, a corundum raw material, magnesium oxide and alumina micro powder as main raw materials, adding iron oxide, a magnesium chloride solution, sodium hexametaphosphate and canary dextrin, mixing the above-mentioned materials by using special procedures, storing an obtained mixed for 30 min, carrying out compression molding and drying the mixture at a temperature of 200 DEG C for 24 h. According to the invention, iron oxide and alumina micro powder are enabled to exist in gaps between aggregate and powder and form hercynite with a low thermal expansion coefficient at a medium-high temperature, and no excess iron oxide enters into a matrix, which enables the ladle brick to have good high temperature stability and anti-stripping performance; therefore, the problem that molten steel carburetting caused by high temperature melting loss of a refractory brick influences smelting quality is overcome, and the prepared carbon-free ladle brick has excellent performances of high strength, washing resistance, a long service life, etc.

The invention discloses a vegetation bag ecological slope protection construction method and a vegetation bag rainwater treatment system. The vegetation bag ecological slope protection construction method comprises the following steps: (a) performing construction preparation; (b) measuring and lining; (c) excavating a foundation pit; (d) pouring concrete to obtain a slope foundation; (e) performing primary rainwater treatment system construction; (f) performing whole slope construction; (g) manufacturing beam grillages; (h) performing secondary rainwater treatment system construction; (i) stacking vegetation bags; (j) planting plants. According to a vegetation bag ecological slope protection system, plant growth substrates are fixed to the interiors of vegetation bags, so that a side slope is more stable and has erosion resistance by utilizing the anchoring effect of the roots of plants; the slope protection foundation which is erosion-resistant, firm and breathable, and suitable for the growth of the plants is formed by combining the characteristics of the beam grillages and the vegetation bags. Meanwhile, the rainwater treatment system is added, so that rainwater is stored in a rainy season and can be used for irrigating the plants in a dry season; on one hand, the slope protection pressure is relieved, and the water and soil loss is further prevented; on the other hand, the rainwater treatment system is favorable to the growth of the plants.

The invention relates to a comprehensive anticorrosive method of a metal pipe fitting, in particular to a comprehensive anticorrosive method combined with a plurality of anticorrosive treatments on the surface of a vehicle metal pipe fitting. The pipe fitting needed to be treated is sequentially treated by the following steps: A, oil removal and derusting; B, Zn-Cr coating; and C, top layer closing, wherein composite phosphating treatment is carried out before the step B. In the anticorrosive method, based on a Zn-Cr coating and aiming at the advantages and the disadvantages of the Zn-Cr coating as well as the structural and using particularity of a water system pipe fitting, a new comprehensive anticorrosive technology combined composite phosphating, Zn-Cr coating and top layer closing is adopted, so that an obtained composite coating achieves the advantages of strong adhesive force, high temperature resistance (280 DEG C) and flushing resistance, obviously enhances the anticorrosion ability of a pipeline, and has stronger binding force and flushing resistance compared with the ordinary Dacromet treatment technology.

The invention relates to a smelting separation furnace lining material and a preparation method thereof. According to the technical scheme, the preparation method of the smelting separation furnace lining material comprises the following steps: mixing 48-60wt% of magnesite particles and 10-22wt% of silicon carbide particles, adding 3-4wt% of phenolic resin, mixing, then adding mixed powder, mixing, moulding, and then drying for 24 hours at the temperature of 180-220 DEG C, so that the melting separation furnace lining material is obtained; the mixed powder is obtained by mixing 10-15wt% of Ti(C,N)-SiC-C composite powder, 4-7wt% of magnesite fine powder, 1-3wt% of silicon carbide fine powder, 2-3wt% of crystalline flake graphite fine powder, 0.5-1wt% of carbon black, 1-3wt% of alpha-Al2O3 micro powder, 0.5-1.5wt% of asphalt powder, 2-4wt% of Si powder and 0.5-1wt% of B4C powder. The smelting separation furnace lining material has the characteristics of high temperature resistance, washing resistance, strong FeO and TiO2 corrosion resistance, good oxidation resistance and excellent thermal shock performance.

The invention discloses an inorganic film tube. The inorganic film tube is made through the extrusion molding and high temperature sintering of silicon carbide as a primary raw material. The invention also discloses a making method of the inorganic film tube. The making method comprises the following steps: uniformly mixing and granulating primary raw materials for making the inorganic film tube to obtain granules; carrying out extrusion molding of the granules in an extruder to obtain a carrier tube blank; drying and sintering the carrier tube blank; coating the sintered carrier tube blank; and drying and sintering the coated carrier tube blank to obtain the inorganic film tube. The inorganic film tube has the advantages of low cost, high strength, scour resistance, erosion resistance, high water flux, strong infiltration capacity and long service life, and is especially suitable for the sewage treatment and high-temperature flue gas filtering separation of environmental protection fields.

The invention discloses a tungsten carbide reinforced carbon matrix composite material and a preparation method. Mesocarbon microbeads are adopted as the matrix, and tungsten carbide ceramic is adopted as the reinforcement phase and is evenly distributed among the carbon microbeads so as to form a three-dimensional network tungsten carbide skeleton reinforced isotropic structure. The preparation method includes: firstly taking tungsten oxide particles and mesocarbon microbeads as the raw materials to prepare uniform and thickness controllable tungsten carbide coating coated mesocarbon microbead powder by molten salt process, then performing pre-press molding, and conducting discharge plasma sintering at 1500-1900DEG C to form a uniform three-dimensional network tungsten carbide ceramic skeleton, which can significantly improve the strength, ablation resistance and oxidation resistance of the carbon matrix, thus forming the isotropic carbon matrix composite material characterized by lowcost, low density and excellent mechanical properties, sintering performance and ablation resistance. Because of the excellent comprehensive performance, the tungsten carbide reinforced carbon matrixcomposite material can be widely applied to aerospace, national defense and other fields, and has broad application prospects.

The invention discloses a corundum mullite crucible and a preparation method thereof, and belongs to the technical field of refractory materials. The corundum mullite crucible comprises the followingraw materials in parts by weight: 25-33 parts of 3-1 mm tabular corundum, 18-27 parts of 1-0 mm tabular corundum, 7-12 parts of 80-mesh corundum sand, 6-12 parts of 320-mesh zircon powder, 6-14 partsof 240-mesh vice-white corundum, 7-14 parts of 150-mesh sillimanite, 1.5-5 parts of 180-mesh Suzhou soil, 3.5-6 parts of Al2O3 micropowder 370C, 3.8-5.8 parts of 200-mesh quartz and 2-5 parts of a binding agent. The crucible made from corundum mullite materials has advantages of small thermal expansion coefficient, good acid and alkali resistance and good thermal shock stability; the corundum mullite materials are ideal materials suitable for ceramic industry; and the crucible is cast and molded by gypsum, and has advantages of low production costs, high efficiency and excellent product performance and overall effect.

The invention discloses a preparation method of a tundish air brick. The preparation method comprises the following steps of: (1) placing 45-55 parts by weight of tabular corundum granules, 10-14 parts by weight of mullite granules and 5-8 parts by weight of chromic oxide granules into a mixer, and mixing for 5-8 minutes; (2) placing 4-6 parts by weight of white corundum fine powder, 2-3 parts by weight of alpha-Al2O3 fine powder and 1.5-3.5 parts by weight of silica micropowder into the mixer, and mixing for 10-15 minutes; (3) adding a mixture prepared from the step (1) to the mixer used in the step (2), mixing for 10-15 minute again, adding 0.4-0.6 part by weight of sodium hexametaphosphate, 0.3-0.5 part by weight of yellow dextrin, 0.1-0.3 part by weight of azodicarbonamide, 0.2-0.4 part by weight of boric acid and 0.1-0.3 part by weight of aluminum fluoride, and then mixing for 10-15 minutes again; (4) ageing for 1-2 hours, pressing for forming by using a press machine, and drying into a drying kiln at 200 DEG C for 24 hours; (5) firing under the condition of 1250-1350 DEG C for 2-3 hours.

The porous filming material for water treatment consists of clay 30-60 wt%, loess 30-60 wt%, kaolin 5-20 wt% and pore creating material 5-20 wt%. The product of the present invention is spherical haydite, and has high mechanical strength, high erosion resistance, high wear resistance and stable physical and chemical properties as well as rich pores, rough surface, great specific surface area, long service life, high adsorption performance, etc. It has high dirt intercepting capacity and high filming efficiency, is suitable for the growth and propagation of microbe and may be used to eliminate organic matter, suspension, nitride, phosphate, etc from water.

The invention relates to a biological filter material based on sulfur-containing tailings as well as a preparation method and application of the biological filter material, and belongs to the technical field of sewage treatment. The biological filter material is prepared by taking sulfur-containing tailings as a raw material, carrying out mechanical force treatment, chemical activation and thermalactivation, compounding the sulfur-containing tailings with sludge biochar prepared from excess sludge, and limestone, and taking aluminum dihydrogen phosphate as a binder. The biological filter material can be used for advanced treatment of secondary effluent with low C/N, no additional organic carbon source is needed, thiobacillus denitrificans are adopted to utilize sulfur in tailings for self-oxidation denitrification, the TN concentration can be reduced to 5 mg/L or below, and the purpose of treating waste with waste is achieved. The sulfur-containing tailings activated by limestone andsludge biochar are used as biofilm carriers, so that the specific surface area of the biological filter material is increased, and the self-oxidation denitrification mass transfer rate of microorganisms is also increased; and aluminum dihydrogen phosphate is used as a binder, so that the operation is convenient, the biological filter material can form a uniform structure, the structural defects ofthe biological filter material are reduced, and the application prospect is good.

The invention discloses a silicon carbide reinforced carbon matrix composite material and a preparation method. Mesocarbon microbeads are adopted as the matrix, and silicon carbide ceramic is adoptedas the reinforcement phase and is evenly distributed among the carbon microbeads so as to form a three-dimensional network silicon carbide skeleton reinforced isotropic structure. Technically, siliconpowder particles and the mesocarbon microbeads are taken as the raw materials to prepare uniform and thickness controllable silicon carbide coating coated mesocarbon microbead powder by molten salt method, after pre-press molding, discharge plasma sintering is carried out at 1600-1900DEG C to form a uniform three-dimensional network silicon carbide ceramic skeleton, while the strength, ablation resistance, oxidation resistance and thermal shock resistance of the carbon matrix are improved, the thermal conductivity of the matrix is also improved, therefore the isotropic carbon matrix compositematerial characterized by low cost, low density and excellent mechanical properties, sintering properties, thermal shock resistance, ablation resistance and thermal conductivity can be formed. Because of the excellent comprehensive performance, the silicon carbide reinforced carbon matrix composite material can be widely applied to aerospace, national defense, electronic packaging and other fields, and has broad application prospects.

The invention discloses a high-abrasion high-alumina brick with heat shock resistance. The high-abrasion high-alumina brick comprises the following components in parts by weight: 5-15 parts of 3-5mm super alum aggregate, 30-40 parts of 1-3mm super alum aggregate, 10-20 parts of 0-1mm super alum aggregate, 20-30 parts of super alum powder, 5-7 parts of zirconium carbide fine powder, 2 parts of chromium carbide powder, 1-3 parts of Suzhou mud NO.2, 8-10 parts of compound binder and 4-6 parts of water. The invention also discloses a manufacturing method of the high-abrasion high-alumina brick with heat shock resistance. The high-abrasion high-alumina brick with heat shock resistance disclosed by the invention has high strength, refractoriness, high abrasion and heat shock resistance, and is applicable to a circulating fluid bed boiler cyclone separator flue, cyclone separator straight section and cone body, a return feeder, a metallurgical furnace and other thermal equipment. The high-abrasion high-alumina brick is simple in manufacturing process and easy to realize.

The invention discloses a dry high temperature resistant furnace lining material and a preparation method and application thereof. The dry high temperature resistant furnace lining material comprisesthe following raw materials in parts by weight: 97-99.5 parts of quartz sand and 0.5-3 parts of boric acid. According to the high temperature resistance property of the quartz sand, an appropriate amount of boric acid is added according to a different particle size ratio, components are further added according to the situation, uniform mixing is carried out, and a furnace lining is constructed; and the obtained dry high temperature furnace lining has significant thermal shock resistance, enhanced refractory properties and wear resistance. Through adding the boric acid, the mixing of the quartzsand with the other components is more uniform; and sodium tripolyphosphate can be matched to effectively promote the smoothness of the lining and enhance the telescopic strength of the lining.

The invention discloses a preparation method of high-purity transparent crystal fused magnesia. According to the preparation method, salt lake water chloromagnesite is adopted as a raw material, magnesium chloride generates magnesium hydrate sediments through an ammonia-lime method, magnesium hydrate is separated from a solution, and then the high-purity magnesium hydrate is slightly roasted to become slightly roasted magnesium oxide; the slightly roasted magnesium oxide is pressed into spheres to serve as raw materials, the spheres are smelted through an electric-arc furnace of 5000 KVA, andfusion is carried out through a high-voltage and high-current operation method; and at the later period of fusion, refining operation needs to be carried out, the temperature of fused liquid is increased to reach 3000 DEG C or above, after melting is completed, a molten lump has to be cooled slowly, and a high-purity transparent crystal fused magnesia clinker is obtained, wherein MgO is larger than or equal to 99%, SiO2 is smaller than or equal to 0.1%, Fe2O3 is smaller than or equal to 0.1%, and CaO is smaller than or equal to 0.1%.

The invention discloses a method for protecting an arsenic sand rock side slope by adopting arsenic sand rock modified building blocks. The method comprises the following steps: 1, dividing slope surfaces into steep slopes and gentle slopes according to slope gradient of a side slope; 2, roughly flattening the slope surfaces with different slope gradients and building the arsenic sand rock modified building blocks on the flattened slope surfaces in a grouping manner; 3, planting herbal plants or woody plants in plant-growing holes of the arsenic sand rock modified building blocks which are built in a grouping manner in the step 2, planting grass in building block plant-growing holes of the steep slope section, and planting the grass or trees on the steep slope. According to the method disclosed by the invention, the arsenic sand rock side slope is protected by using the arsenic sand rock modified building blocks, so that in-place resource utilization of the arsenic sand rock is realized, and the problem that an existing side slope protection way needs to be continuously and renewedly protected every year is also solved; moreover, by adopting the method, the characteristic of the arsenic sand rock is comprehensively utilized, materials are taken in place, and protection of the side slope by using green planting and preparation of the modified building blocks are combined effectively, so that a protection effect is enhanced.

The invention discloses a preparation method of an urban river polluted bottom mud active covering plate. The preparation method comprises the following steps: (1) collecting sludge of water purification plants to prepare sludge cakes, and calcining the sludge cakes at 380-450 DEG C for 3.5-4.5 hours to prepare sludge blocks; (2) carrying out mechanical crushing and mechanical vibration screeningon the sludge blocks to prepare the calcining modified sludge particles with a particle size of 1-5 mm; (3) adding 17-18 parts of the calcining modified sludge particles, 4-6 parts of cement and 5-8 parts of fly ash into a stirrer according to a water-cement ratio of 0.26-0.29, uniformly carrying out mixing, and carrying out standing to enable the aggregate and the binder to be fully mixed; (4) adding the stirred bottom material into a mold frame for pressing, wherein the pressing time is 60-80 seconds, and the pressing pressure is 0.75-0.8 MPa; (5) carrying out demolding to obtain a coveringplate 12-16 hours after compression molding; and (6) standing the covering plate finished product under a natural outdoor condition at a temperature of 20-25 DEG C for 12-16 days, wherein the obtainedcovering plate can be used for engineering application. The covering plate prepared by the method has the advantages of good water permeability, high water retention, washing resistance and the like.

The invention discloses a high-strength and wear-resistant castable for a middle back section of a blast furnace water slag punching groove. The castable comprises the following raw material components in parts by mass: 40 to 70 parts of waste ceramic aggregate, 3 to 25 parts of brown aluminum oxide, 1 to 5 parts of silicon carbide fine powder, 10 to 25 parts of calcium aluminate cement, 0.5 to 5parts of chromium sesquioxide fine powder, 1 to 4 parts of heat-resistant steel fiber and 1 to 8 parts of silicon dioxide micropowder; based on the mass percentage of the raw material components, theadditional components comprise 0.05 to 0.5 percent of organic explosion-proof fiber, 0.5 to 1.5 percent of boron carbide, 0.05 to 0.5 percent of water reducer and 0.02 to 0.2 percent of retarder. Thewaste ceramic serves as the main raw material to produce the wear-resistant castable of the middle back section of blast furnace punching slag by utilizing the characteristics that the waste ceramic material is compact in structure, high in hardness and washing-out resistant, so the characteristics of low cost, high strength, high wear resistance, long service life and the like are achieved, and energy saving and emission reduction are realized.

The invention discloses a high-alumina brick. The high-alumina brick comprises, by weight, 5-15 parts of 3 mm-5 mm super alumina aggregate, 30-40 parts of 1 mm-3 mm super alumina aggregate, 10-20 parts of 0 mm-1 mm super alumina aggregate, 20-30 parts of super alumina powder, 5-7 parts of zirconium carbide powder, 1-3 parts of Guangxi mud, 8-10 parts of composite bonding agents and 4-6 parts of water. The invention further discloses a manufacturing method of the high-alumina brick. The high-alumina brick is of high strength, high refractoriness, high abrasion resistance and high thermal shock resistance and is applicable to a cyclone separator flue, a cyclone separator straight segment and a cone of a circulating fluidized bed boiler, a back-feeder, a metallurgical industrial furnace and other thermal equipment. The manufacturing process of the high-alumina brick is simple and easy to implement.