Heat shock resistant refractory brick formed with slurry binding agent and production process thereof

Abstract

A heat shock resistant refractory brick with long service life is prepared from high-Al powder, mullite, sillimanite, cordierite, andalusite, argil and mud as adhesive through grinding, shaping and sintering.

Description

1. Technical field [0001] The invention relates to a thermal shock-resistant refractory brick formed by combining mud and used in a blast stove for smelting iron and steel and a production method thereof. 2. Background technology [0002] The development of the world economy provides a broad market for steel production. At the same time, higher requirements have been put forward for steel production. Especially 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 hot (heat 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. Anti-flaking high-alumina bricks are generally formed by combining water or li...

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 formed by combining mud 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: The refractory brick of the present invention is made of mullite, sillimanite powder, high alumina powder, andalusite, cordierite powder and white clay as the base material, and then 3-15% of the weight of the base material is added into the mud binder and then sintered. Its production method is to add mud binder according to the requirements of the base material composition, mix and grind evenly, shape it with a molding machine, and then fire it in a sintering furnace at a high temperature of ≥ 1350 ° C. The product of the present invention has good thermal shock resistance. In use, it can effectively prevent bricks from dropping and breaking, has a long service life and high production efficiency, and avoids great economic losses caused to enterprises due to furnace shutdown and maintenance. It has broad prospects for promotion and application, and huge economic and social benefits.