83results about How to "High compressive strength at room temperature" patented technology

The invention relates to a high temperature refractory material, and specifically relates to a high temperature creep resistant mullite-cordierite product and a preparation method thereof. The product is prepared from the main raw materials of sintered mullite, cordierite, white corundum, fused quartz, kyanite, alumina micro powder, bentonite micro powder, slaked talcum micro powder and kaolin by the steps of mixing, mixture ageing, forming-drying and final high-temperature firing. By adopting scientific mixing proportion and graduation, and using a resonable production method, the high temperature creep resistant mullite-cordierite product provided by the invention is prepared. Compared with other products, the high temperature creep resistant mullite-cordierite product provided by the invention has the advantages of low apparent porosity, high volume density, good creep resistance, excellent thermal shock resistance, long service life, and on the like, and is mainly suitable for moderate temperature material sintering, such as sintering of cobaltous oxide and ferric aluminum phosphate raw materials for automotive batteries in chemical industry.

The present invention particularly relates to a method for manufacturing a silicon mullite brick by adopting bauxite tailings so as to solve a problem of high raw material cost of the existing silicon mullite brick. According to the method for manufacturing the silicon mullite brick by adopting bauxite tailings, bauxite tailings is adopted to replace mullite with expensive cost to be adopted as a main raw material, and is matched with silicon carbide and other materials, and high-pressure molding and medium temperature firing are performed to obtain the silicon mullite brick. The method has characteristics of comprehensive resource utilization, energy saving and environmental protection. The obtained silicon mullite brick has advantages of high compressive strength at a room temperature and low cost, wherein a compressive strength of the product achieves 115-137 MPa, thermal shock resistance under a 1100 DEG C water cooling condition achieves 60-110 times, room temperature wear resistance achieves 9-13 cm<3>, and content, bulk density, apparent porosity, and refractoriness under load of alumina are higher than the national standards.

The invention discloses a regenerative iron runner castable. The iron runner castable with low cost is manufactured by utilizing cheap skateboard grinding waste materials of which main components include corundum, high-alumina bauxite and carbon materials, so that the apparent porosity of the iron runner castable is obviously reduced, the volume density and the rupture strength are increased, and the slag resistant performance is enhanced. Compound silicon sol-sodium polyacrylate in the iron runner castable is used as a binding agent, so that the iron runner castable forms a large quantity of meshy mullite crystals in different shapes at high temperature, the meshy mullite crystals are scattered in structures, so that the high-temperature rupture strength is increased, the cold crushing strength of the iron runner castable is enhanced, and the construction performance is improved. The performance of the regenerative iron runner castable is flat with that of an existing iron runner castable, the price is only 85% of the existing iron runner castable, and the regenerative iron runner castable meets the development requirements of clean production and circular economy.

The invention discloses a method of adding carbonless brick binding material. The carbonless brick magnesium salt complex binding material is magnesium salt. The invention is characterized in that the invention adopts the compound addition of solid magnesium salt and magnesium salt solution. The adding amount of the solid magnesium salt is 0.5%-2% of that of the carbonless brick raw material while the adding amount of the magnesium salt solution is 3%-5% of that of the carbonless brick raw material. The technique process is as follows: first, adding carbonless brick particles into an edge runner wet mill, then, solid magnesium salt is added into the edge runner wet mill to be dryly mixed for 1-2 minutes to lead the solid magnesium salt to be uniformly distributed in the particles; adding in the magnesium salt solution with the amount of 3%-5% of the mixing material amount, and wet mixing is carried out for 1-2 minutes, then a mixing roll with a roller is adopted for mixing; putting powder material in and discharging is carried out after 8-13 minutes of wet mixing, finally, shaping by pressure and drying the half finished product under the temperature of 160-200 DEG C for more than 36 hours. Because the invention adds solid magnesium salt on the base of adding magnesium salt solution in the rolling mixture, the binding material concentration is enhanced. The method of adding complex binding material is simple in operation and low in cost, which enhances the quality of product and has wide popularization value.

The invention provides a manufacture process of an immersive elongated-nozzle zirconia flow control, comprising the following steps: 1), mixing and grinding raw materials; 2), making the materials into blanks; 3), firing; 4) preparing particles; 5), removing iron; 6), preparing powder; 7), mixing semi-finished products; 8), granulating; 9), forming under high pressure; 10), drying; 11) charging into a kiln; 12), sintering at high temperature; 13) emptying the kiln; 14), inspecting and packaging to obtain finished products. The immersive elongated-nozzle zirconia flow control manufactured by using the process has high normal-temperature pressure resistance, good thermal shock stability and good scour resistance, zirconium product cracks are effectively reduced, product quality is guaranteed, and the life of each product is prolonged.

The invention discloses a fire, wear and acid resistant clinkery brick which comprises 30 to 55 percent of waste ceramics, 20 to 45 percent of flint clay, 5 to 15 percent of clay, and 5 to 15 percent of modifier. The preparation method comprises the following steps that: the waste ceramics is cleared and crushed into 0.01 to 5mm grain size, the flint clay is crushed into 0.01 to 5mm grain size, and the clay and the modifier are ground into the granularity with 0.01 to 0.074 grain size; and then the dry materials are dry mixed uniformly, dextrin water topping which is 2 to 5 percent of the total weight of the dry materials is added in, pressed, formed, dried and fried for 3 to 8h at the high temperature of 1000 to 1300DEG C; and the materials are drawn and cooled, and a finished product is obtained after the acceptance is past. The invention has the advantages of high pressure resistant strength at normal temperature, smooth product surface, small friction coefficient, low wear rate, good thermal shock resistance, excellent corrosion resistance, low cost and one-step success of coke investment. As estimated, the service life of a coke cooling bench is prolonged by more than 3 times and is expected to be more than 10 years.

The invention discloses an AZC (alumina-zirconia-chromium sesquioxide) lattice brick, a manufacturing method of the AZC lattice brick and a heat accumulation chamber built of the AZC lattice brick. The AZC lattice brick is manufactured from the following components in percentage by weight: 70-75% of alumina, 7-12% of zirconia, 6-10% of chromium sesquioxide and 9-12% of aluminum phosphate, wherein the chromium sesquioxide is prepared by calcining waste chromium sesquioxide twice, and the chromium sesquioxide has a particle size of more than 6,000 meshes. The AZC lattice brick has quite low apparent porosity, high bulk density, high compression strength at normal temperature and high refractoriness under the load of 0.2MPa. External substances (harmful gases generated during the combustion of petroleum coke) can be prevented from intruding into the AZC lattice brick so that the organizational structures of refractory materials can be kept intact. In addition, the AZC lattice brick has strong capacity of resisting the erosion of harmful gases generated during the combustion of petroleum coke and has good creep resistance.

The invention relates to the field of refractory materials, particularly to a microporous mullite light aggregate and a production method thereof, and solves the problems of the prior art, such as large volume density, poor compression strength and fire resistance, high heat conductivity, large pore size and non-uniform pore distribution. The light aggregate is made from bauxite, coal gangue, sawdust and petroleum coke. The production method comprises the following steps: crushing raw materials respectively, mixing thoroughly, adding water 80-85% the total weight of the raw materials, wet-milling, filtering with a screen mesh, molding under 6-8 MPa, drying at 180-200 DEG C for 65-75 h, calcining at 1400-1450 DEG C for 9-10 days, crushing, and sieving to obtain mullite light aggregate. Theproduct has the advantages of high porosity, less volume density, small average pore size, small heat conductivity, high compression strength and good fire resistance. The product is widely used as heat-insulating material or directly used in work lining and roof of various industrial furnaces such as heating furnace.

The invention discloses a preparation method and a use method of a modified magnesian unfired product binding agent, and the preparation method comprises the following steps: adding ferrocene into anhydrous phenolic resin to obtain the modified magnesian unfired product binding agent; taking the modified magnesian unfired product binding agent which accounts for 3-5% of the total weight of the aggregate and the powder of the magnesian unfired product; and carrying out hot mixing, molding under the pressure intensity of 150-350MPa, and carrying out reduction gas heat treatment at 1650 DEG C for4h. The anhydrous phenolic resin is modified, so that the inherent advantages of high viscosity, high carbonization residual carbon content and high product strength of the binding agent are ensured;according to the method, the carbon nanostructure is formed in the carbonization process, the organic grid structure is synthesized in situ at the heat treatment temperature, crystalline carbon graphite with very high oxidation resistance is formed in the carbonization process, the carbon nanostructure is formed in the medium-temperature reducing atmosphere, the strength and the heat stability ofthe magnesium unfired product are further enhanced, and the method has practical significance in production and preparation of the magnesium unfired product.

The invention discloses a pouring glazed tile used for an oversized coke oven of a specific structure. The pouring glazed tile comprises the following components: secondary alumina, alumina cement, alumina, additives, water, waste quartz glass and waste refractory bricks, wherein the total weight of the waste quartz glass and the waste refractory bricks accounts for not more than 40% of the totalweight of all the components, and the additives comprise spodumene, potassium feldspar, quartz, clay, alumina and water. The invention also discloses a preparation method of the energy-saving and environment-friendly glazed tile. The glazed tile obtained by adopting the preparation method can not produce bubbles, fly glaze or fall off at high temperature of 1300 DEG C, a smooth glaze layer is realized, and expansion coefficient of the glaze layer is close to that of a biscuit firing billet, so that the biscuit firing billet and the glaze layer are basically consistent in thermal expansion andshrinkage, the billet and the glaze layer are free of cracks, thermal expansion coefficient of the overall product is consistent, and thermal expansion problem of the glaze layer and the biscuit firing billet is solved.