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...

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, the object of the present invention is to provide a thermal shock resistant refractory brick and its production method, which can effectively solve the problems of poor shock resistance and short service life of the refractory brick. The technical solution is that the refractory brick of the present invention consists of Mullite, corundum, α-Al 2 o 3 Micropowder, andalusite and clay powder constitute the base material, and then add 3-15% of the binder of the base material weight to make it. The production method is to add the binder according to the requirements of the base material composition, mix and grind evenly, and shape it with a molding machine , and then fired in a sintering furnace at a high temperature greater than 1450°C. The product of the present invention has good thermal shock resistance, effectively prevents bricks from falling and breaking during use, has a long service life, high production efficiency, and avoids maintenance due to shutdown of the furnace Great economic losses caused to enterprises, broad prospects for promotion and application, huge economic and social benefits