Aluminum-zirconium spinel refractory brick and preparation method thereof

Abstract

The invention discloses an aluminum-zirconium spinel refractory brick and a preparation method thereof. The aluminum-zirconium spinel refractory brick is prepared from the following components in parts by weight: 40-60 parts of bauxite clinker, 20-37 parts of white corundum, 8-12 parts of zirconia powder, 2-5 parts of alpha alumina powder, 5-8 parts of aluminium dihydrogen phosphate, 0.5% of nano-grade ZrO2 and 0.5% of nano-grade primary aluminum alumina with the mass fraction being 88%; and selected raw materials are subjected to crushing grinding, sieving, mixed grinding, pressing forming and calcining, and thus the aluminum-zirconium spinel refractory brick is prepared. The aluminum-zirconium spinel refractory brick has good thermal stability, and is easy to sinter and low in impurity quantity, a good solid phase structure is formed after sintering, a stable internal microstructure is formed during high-temperature firing, the flexural strength and compressive strength of a productare improved, the defect of poor shock resistance of a basic refractory material is overcome, and good wear resistance is achieved.

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, ...

AI Technical Summary

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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