Composite thermal-shock-resisting high-aluminum refractory brick and preparation method thereof

Abstract

The invention relates to a composite thermal-shock-resisting high-aluminum refractory brick for steel smelting blast furnace hot blast stoves and a preparation method of the brick. The refractory brick is prepared by mixing and evenly grinding homogeneous material, sillimanite, andalusite, alpha-aluminum oxide, zirconium oxide, soft clay powder and water, forming via a machine and firing at a temperature of 1475-1500 DEG C. According to the composite thermal-shock-resisting high-aluminum refractory brick and the preparation method, the formula is reasonable, the cost is relatively low, the preparation method is simple, the operation is easy, the thermal shock resistance of the fired refractory brick is greatly enhanced, the service life of the hot blast stoves is prolonged and the economic benefit of the enterprises is improved.

Description

technical field [0001] The invention relates to a composite type high thermal shock-resistant refractory brick used in a blast stove for smelting iron and steel and a preparation method thereof. Background technique [0002] With the enlargement of blast furnaces for smelting iron and steel and the development of hot blast stove longevity technology, people's requirements for the quality of hot blast stove lining materials are also getting higher and higher. Due to the harsh working conditions of the hot blast stove burner pipes, hot blast outlets and other parts, frequent alternation of cold and hot, that is, thermal shock phenomenon, the refractory materials in the above parts are more likely to be damaged, resulting in a greatly reduced life of the hot blast stove. At present, the thermal shock-resistant bricks produced by my country's refractory enterprises, such as andalusite bricks, cordierite mullite bricks, and anti-stripping high-alumina bricks, etc., due to the pro...

AI Technical Summary

Problems solved by technology

Due to the harsh working conditions of the hot blast stove burner pipes, hot blast outlets and other parts, frequent alternation of cold and hot, that is, thermal shock phenomenon, the refractory materials in the above parts are more likely to be damaged, resulting in a greatly reduced life of the hot blast stove

At present, the thermal shock-resistant bricks produced by my country's refractory enterprises, such as andalusite bricks, cordierite mullite bricks, and anti-stripping high-alumina bricks, etc., due to the problem of the raw material ratio of the refractory bricks, the thermal shock resistance effect is not very ideal.

The current number of water-cooling tests for thermal shock-resistant refractory bricks is generally less than 80 times. The thermal shock stability is poor, and bricks are prone to falling and cracking during use, and the service life is short, causing great economic losses to the enterprise.

Moreover, the current depletion of mineral resources has resulted in a shortage of raw materials, high prices for refractory bricks, and excessive cost burdens for enterprises.