34results about How to "Good refractoriness" patented technology

The invention relates to the corhart technical field, in particular to quartz bricks for 7.63m coking chamber. The invention overcomes the drawbacks of the prior quartz bricks for 7.63m coking chamber that as difference exists in the quality and choice of the corhart, the particle fineness and size distribution of the material are unreasonable, iron content is above the standard. The weight percentage compositions of the formulation of the invention are as follows: twenty-five percent to thirty-five percent of silica coarse power, forty-one percent to forty-seven percent of silica middle power, ten percent to twenty percent of fine powder formed by fifty percent of silicon and residual fifty percent of silica brick, and ten percent to twenty percent of residual silica brick. The material further comprises accessories of one point nine percent to two point one percent of mineralizer mixed by manganese powder and potassium feldspar according to a proportion of one to one, seven point five percent to eight point five percent of lime cream and zero point nine percent to one point one percent of paper pulp. The invention is superior over the prior quartz bricks of the prior 7.63m coking chamber in terms of physicochemical indexes of the silica brick made by the formulation of the invention, such as chemical composition, compressive strength, porosity and refractability, etc., particularly in terms of lower content of bengala ( Fe2O3). The invention has the advantages of rich source of the material, reasonable fineness of aggregate and size distribution.of particles. The quartz brick can meet the design and complication degree of and dimensions of shapes of bricks for the 7.63 coking chamber and is suitable for mass production of the coking chamber.

The invention discloses a low-thermal-conductivity mullite tin bath combined top cover brick prepared from the following raw materials by the mass percentage: 40.5%-65% of a mullite aggregate, 8%-15% of calcium aluminate cement, 4%-10% of a silica micropowder, 10%-18% of an alumina micropowder, 5%-13% of a mullite fine powder, 2%-3% of a mineralizing agent, and 0.1%-0.5% of a water reducing agent. The low-thermal-conductivity mullite tin bath combined top covering brick has the advantages of small thermal conductivity coefficient, small proportion, light weight, high strength, good thermal shock resistance, high refractoriness (greater than 1700 DEG C) and the like; the tin bath combined top cover brick is used in a top cover of a tin bath, greatly reduces the kiln body weight, and reduces the kiln body heat capacity while saving cost; the tin bath combined top cover brick has good thermal shock resistance, and has the service life of a kiln improved greatly; and the tin bath combined top cover brick has the advantages of small thermal conductivity coefficient, good thermal insulation effect and little heat loss, significantly improves the thermal utilization efficiency, saves energy, greatly reduces the energy consumption, and is suitable for popularization and application.

The invention provides a fireproof self flowing casting material, which is prepared from the following raw materials in parts by weight: 5 to 40 parts of corundum, 5 to 20 parts of aluminum oxide hollow balls, 5 to 20 parts of alpha-aluminum oxide powder, 1 to 15 parts of silicon micro powder, 1 to 15 parts of magnesia and 5 to 10 parts of bonding agent, wherein the bonding agents are silica sol and silane coupling agents. Through the matching of the specific ingredients and dosage, the performance such as flowability, refractoriness, strength and the like of the casting material can be obviously improved, so that the service life of the casting material is prolonged.

The invention discloses a high-aluminum low-silicon casting material. The high-aluminum low-silicon casting material comprises the following components in percentage by weight: 44-73% of low-silicon compact electrofusion white alundum, 1-5% of aluminum oxide micro powder alpha-A, 2-7% of active aluminum oxide rho-A, 3-6% of nanometer-level ZrO2, 1-5% of an additive, 3-8% of pure calcium aluminate cement and 17-25% of 320-mesh electrofusion white alundum. The high-aluminum low-silicon casting material disclosed by the invention is high in strength, good in toughness and small in linear variation under high temperature environment.

The invention discloses a fireproof sheet honeycomb ceramic automobile exhaust purification material and a preparation method thereof. The fireproof sheet honeycomb ceramic automobile exhaust purification material is characterized by being prepared from, by weight, 10-15 parts of floating beads, 40-50 parts of cordierite, 1-3 parts of TiO2, 1-3 parts of clay, 4-8 parts of sodium carbonate, 10-15 parts of stearic acid, a proper amount of a 1 mol / L HNO3 solution, 50-60 parts of nanometer aluminum oxide sol, 1-3 parts of 1 mol / L La(NO3)3, 1-2 parts of a 1 mol / L Sr(NO3)2, 0.5-1 part of a 1 mol / L Co(NO3)2, 2-6 parts of a 1 mol / L critic acid and 100-200 parts of deionized water. By means of ZrO2 powder and CrO2 powder, the comprehensive performance of a honeycomb ceramic carrier is enhanced, and the honeycomb ceramic carrier has the advantages of being high in compressive strength, resistant to high temperature, good in chemical stability, high in corrosion resistance and the like; due to the load La-Sr-Co-O catalyst, the automobile exhaust purification efficiency is improved; meanwhile, the honeycomb ceramic carrier is made into the sheet shape, installation and replacement are convenient, meanwhile, the cost is saved, sufficient utilization of resources are promoted, and the current environment-friendly trend is met.

The invention discloses a coating, a preparation method thereof and a method for spraying the coating on a metal mold cavity, and belongs to the technical field of coatings. The coating is prepared by mixing the following raw materials in parts by weight: 20-30 parts of a main material, 3-5 parts of an adhesive and 40-60 parts of water, the main material comprises refractory aggregate, glass powder, calcium carbonate and zinc oxide in a weight ratio of (10-14): (2-6): (3-6): (1-3). The coating has good high temperature resistance and can be firmly adhered to the surface of a cavity of a metal mold.

The invention provides a formula of water-based lost foam paint for low-temperature high-strength ductile iron. The formula comprises refractory aggregate, an adhesive, a suspension agent, a surface active agent and a carrier; the refractory aggregate comprises diatomaceous earth, zircon powder, forsterite powder and flake graphite; the adhesive comprises polyving akohol and silica sol; the suspension agent comprises lithium-based bentonite and aluminum-magnesium silicate; and the surface active agent comprises a water-based defoamer, a wetting agent and a penetrating agent. The paint preparedaccording to the formula has excellent sag resistance, uniformity, thermal stability and metal oxidative corrosion resistance, and castings cast through the paint have excellent surface finish and clear outlines.

The invention discloses ceramsite sand with dedusting ash as well as a preparation method and application thereof. The ceramsite sand is prepared from the following components in parts by weight: 70-80 parts of fly ash, 10-15 parts of cement, 1-5 parts of VAE glue powder and 1-5 parts of silicon ash. The ceramsite sand with dedusting ash replaces conventional sand to prepare coated sand; firstly,the ceramsite sand with dedusting ash is small in stacking density, good in angular coefficient and large in specific surface area under the equivalent weight condition; the consumption of adhesive inpreparation of the coated sand is low; a better coating effect is achieved in the process of preparing the coated sand; mullite is taken as a main crystal phase of the prepared ceramsite sand; the ceramsite sand has extremely high resistance to high temperature and good thermal stability; the size accuracy of castings can be ensured; the preparation method of the ceramsite sand with dedusting ashis simple; a large amount of energy does not need to be consumed in the preparation process; compared with other common raw sand of the coated sand, the ceramsite sand with dedusting ash is low in cost.

The invention belongs to the technical field of refractory materials, and particularly relates to a blast furnace slag chute castable and a preparation method thereof. The raw material of the blast furnace slag chute castable is composed of the following components by weight: 8mm<homogenized alumina particle size≤12mm, 20-23%, 3mm<homogenized alumina particle size≤8mm, 17-20%, 1mm ≤ 8~12% for coke gemstone particle size ≤ 3mm, 9~11% for 0mm < white corundum particle size ≤ 1mm, 9~10% for bauxite powder with particle size ≤ 0.074mm, and 9~10% for white corundum powder with particle size ≤ 0.044mm 8~10%, particle size ≤0.005mm, Al2O3 micropowder is 8~10%, particle size≤0.074mmCA-70 cement is 5~10%, particle size≤0.074mm, silica dust powder is 1~3%, particle size≤0.074mm Diameter ≤0.074mm Guangxi white mud 2-3%; plus 0.1-0.3% industrial grade sodium hexametaphosphate, 0.3-0.6% stainless steel fiber, 0.03-0.06% explosion-proof fiber by the total weight of the above raw materials. The blast furnace slag chute castable has the characteristics of good anti-sticking performance, high strength, stable thermodynamic performance and the like.

The invention provides a refractory self-flowing castable, which is prepared from the following raw materials in parts by weight: 5-40 parts of corundum, 5-20 parts of alumina hollow spheres, 5-20 parts of α-alumina powder, 1-15 parts of silicon micropowder, 1-15 parts of magnesia, 5-10 parts of binder, the binder is silica sol and silane coupling agent. The present invention obviously improves the fluidity, refractoriness, strength and other properties of the casting material through the combination of the above specific components and dosage, thereby prolonging the service life of the casting material.

The invention discloses a low-thermal-conductivity mullite tin bath combined top cover brick prepared from the following raw materials by the mass percentage: 40.5%-65% of a mullite aggregate, 8%-15% of calcium aluminate cement, 4%-10% of a silica micropowder, 10%-18% of an alumina micropowder, 5%-13% of a mullite fine powder, 2%-3% of a mineralizing agent, and 0.1%-0.5% of a water reducing agent. The low-thermal-conductivity mullite tin bath combined top covering brick has the advantages of small thermal conductivity coefficient, small proportion, light weight, high strength, good thermal shock resistance, high refractoriness (greater than 1700 DEG C) and the like; the tin bath combined top cover brick is used in a top cover of a tin bath, greatly reduces the kiln body weight, and reduces the kiln body heat capacity while saving cost; the tin bath combined top cover brick has good thermal shock resistance, and has the service life of a kiln improved greatly; and the tin bath combined top cover brick has the advantages of small thermal conductivity coefficient, good thermal insulation effect and little heat loss, significantly improves the thermal utilization efficiency, saves energy, greatly reduces the energy consumption, and is suitable for popularization and application.

The invention belongs to the field of electrical equipment and discloses an evanescent mold ammeter shell. The evanescent mold ammeter shell is prepared and obtained according to the following process that EPS beads are subjected to foaming once and then are poured into a mold cavity, a model is formed through expansion under the action of high-temperature steam, is put into a precoated sand mold, is solidified through sand jetting and heating, is immersed into fireproof paint prepared in advance, and is taken out, and the surface of the model is evenly coated with the fireproof paint; liquid metal is poured into a mold, and a casting is formed after cooling; after the casting is formed, a sand shell without the outer surface is formed so as to obtain the needed metal shape which is exposed completely; and residual sand grains and an oxide skin on the surface of the casting are removed, and the evanescent mold ammeter shell is obtained. The evanescent mold ammeter shell is complete in structure, filling of all corners is good, and fire resistance is good.

The invention relates to a low-cost environmentally-friendly alcohol-based cast iron coating and a preparation method thereof. The low-cost environmentally-friendly alcohol-based cast iron coating comprises 46-55% of bauxite, 3-9% of quartz powders, 3-6% of mullite powders, 3-6% of pyrophyllite powders, 2.43-3.14% of sodium bentonite, 1.92-3.82% of expandable graphite, 0.38-0.65% of rosin, 0.38-0.58% of low viscosity polyvinyl butyral, and 27-31% of alcohol. According to the low-cost environmentally-friendly alcohol-based cast iron coating and the preparation method thereof, an easy-peeling coating is formed after pouring, the surface of the obtained casting is smooth and clean, and the dimensional accuracy is high; compared with traditional cast iron coating, the content of graphite is reduced from 100% to less than 4%, black pollution is reduced, obvious price advantage is obtained, raw material resources are extensive, cost performance is high, and the low-cost environmentally-friendly alcohol-based cast iron coating has broad application prospects.

The invention discloses a regenerated brick for a carbon kiln and a preparation method thereof, and relates to the technical field of regenerated bricks and its preparation. The regenerated bricks include raw materials in the following percentages by weight: carbon kiln repair waste bricks 60-80%, high alumina powder 10-20%, pure calcium aluminate cement 4-16%, silicon micropowder 4-5%, three Sodium polyphosphate 0.05-0.15%, sodium hexametaphosphate 0.05-0.15%, explosion-proof fiber 0.05-0.17% and additive 3-4%; the production method is to mix and stir the raw materials into a mixed slurry, cast and mold, demould, Dry it at a constant temperature of 25-35°C. The regenerated bricks of the present invention solve the problems of difficult disposal of carbon kiln waste bricks and high energy consumption and high cost of making regenerated bricks by optimizing raw material preparation and production methods, and realize green recycling of resources and energy saving and environmental protection. In the case of sintering, the refractoriness, compressive strength, high-temperature flexural strength and other properties of the regenerated bricks produced are good, and all meet the use standards.

The invention discloses a wear-resistant frit, a preparation method of the frit and a glaze using the same. A wear-resistant frit is calculated according to the mass percentage, and its raw materials include the following components: prefabricated frit 20-36%, 20-38% of talc, 2-5% of zinc oxide, 8-12% of calcined alumina, 20-24% of kaolin and 7-9% of fluorite; calculated according to mass percentage, the raw materials of the prefabricated frit include the following components : Potassium feldspar 15-20%, dolomite 5-10%, talc 45-55%, zinc oxide 2-5% and aluminum oxide 20-25%. The wear-resistant frit has good transparency and good wear resistance. The preparation method of the wear-resistant frit is simple, and each raw material component is fully melted during the high-temperature firing process. The prepared wear-resistant frit is The block has high transparency and good wear resistance. Using the glaze material of the wear-resistant frit, the glaze layer has good wear resistance, and the glaze surface has good surface gloss and good light transmission performance.