A kind of aluminum zirconium refractory material brick and preparation method thereof

Abstract

An aluminum-zirconium spinel refractory brick and a preparation method thereof, the weight composition of 100 parts: 40-60 parts of bauxite clinker, 20-37 parts of white corundum, 8-12 parts of zirconia powder, α 2-5 parts of alumina powder, 5-8 parts of aluminum dihydrogen phosphate, 0.5% nano-sized ZrO 2 and 0.5% of nano-scale raw bauxite with a mass fraction of 88%; the selected raw materials are obtained after crushing, grinding, sieving, mixing, pressing and calcination. The aluminum-zirconium spinel refractory brick of the present invention has good thermal stability, is easy to sinter, and has few impurities. After sintering, it forms a good solid phase structure, and forms a stable internal microstructure when fired at high temperature, which improves the The flexural strength and compressive strength of the product have improved the disadvantages of poor shock resistance of alkaline refractory materials, and have good wear resistance.

Description

technical field [0001] The invention relates to the technical field of refractory materials. Background technique [0002] Traditional refractory materials are made of natural ores (such as refractory clay, silica, dolomite, etc.). With the advancement of technology, more and more industrial and synthetic materials are used in the manufacture of refractory materials. Therefore, refractory materials on the market There are many types of materials. According to the mineral composition, refractory materials are divided into: silicon oxide, aluminum silicate, magnesia, dolomite, spinel, carbonaceous, zirconium and special refractories. [0003] The disadvantage of inorganic non-metallic refractory materials is that they have poor mechanical toughness. Usually, refractory materials do not need to be moved during use, but their poor mechanical toughness also affects their thermal shock resistance at high temperatures. Or use a gap, the refractory material is very easy to crack, ...

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Problems solved by technology

[0003] The disadvantage of inorganic non-metallic refractory materials is that they have poor mechanical toughness. Usually, refractory materials do not need to be moved during use, but their poor mechanical toughness also affects their thermal shock resistance at high temperatures. Or use a gap, the refractory material is very easy to crack, peel off, etc. under the action of thermal expansion and contraction, which affects the integrity of the material and reduces the service life of the refractory material

[0004] At present, lead and copper smelting in non-ferrous smelting are generally smelted by anode furnaces, converters, bottom-blown furnaces, and side-blown furnaces. The refractory materials used in the furnace lining are magnesium-chromium or aluminum-chromium refractory materials. Corrosive, but thermal stability and slag resistance are poor, and chromium-containing refractories have serious environmental pollution, high manufacturing costs, easy hydration, and shortened use time. When used in slag lines and slag ports, the service life is longer Short, frequent replacement, high labor intensity, reducing enterprise production efficiency

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