Thermal-shock resistant fireproof brick and production process thereof

Abstract

The invention relates to a heat shock resistance firebrick and the manufacture method. The method is that it adopts mullite, corundum, alpha-Al2O3 powder, andalusite and clay as base material, adding 3-15wt% binding agent. The process includes the following steps: adding binding agent into the base material, grinding to equal, molding, sintering at 1450 degree centigrade. The invention has good heat shock resistance, long useful life, etc. It has great economic and social benefits.

Description

1. Technical field

[0001] The invention relates to a heat-shock-resistant refractory brick used in a blast stove for smelting iron and steel and a production method thereof. 2. Background technology

[0002] With the large-scale blast furnace and the development of hot blast stove longevity technology, the quality of hot blast furnace lining materials is becoming more and more important. Due to the harsh working conditions of hot blast stove burner bricks, pipe bricks, hot blast outlets and other parts, frequent alternation of cold and heat (thermal shock phenomenon) ), it is more destructive to the refractory materials in these parts, and the life of the hot blast furnace is closely related to it. The number of anti-water cooling tests of high alumina bricks is generally 20, 30, 40, 50, 70 times, and rarely reaches more than 80 times. However, due to poor thermal shock stability and other reasons, these refractory bricks are easy to use in use. The phenomenon of brick fall...