Compact clay brick for blast furnace

Abstract

The invention provides a compact clay brick for a blast furnace, which comprises a substrate, wherein the substrate comprises a central base layer and a compact layer arranged on the upper surface of the base layer; a micro-porous insulating layer is arranged on the lower surface of the base layer; the thickness of the micro-porous insulating layer is 1 / 3 of the thickness of the base layer; the thickness of the compact layer is 1 / 5 of the thickness of the base layer; blind holes of which the hole diameters are 10-15mm are uniformly distributed in the surface of the base layer; and cement paste is poured in the blind holes. The compact clay brick is formed at high pressure and high temperature and is firm in structure, low in cost, resistant to high temperature and good in thermal stability.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to clay bricks for blast furnaces. Background technique [0002] With the development of modern smelting technology, blast furnace is the main equipment for ironmaking, and clay brick is the earliest lining material for blast furnace. Since the 1950s, the volume of blast furnaces has become larger. Hearths with a diameter of 8 to 12m have become more common, and productivity has increased rapidly. However, the erosion of furnace body refractory bricks and bosh refractory bricks has significantly affected blast furnace production, while traditional clay bricks Since its porosity is as high as about 20%, it is no longer suitable for use in existing blast furnaces. Therefore, developing a new type of high-performance dense clay brick to replace the original clay brick has become the primary goal at this stage, and the technology center has undertaken the research and development ta...

AI Technical Summary

Problems solved by technology

Since the 1950s, the volume of blast furnaces has become larger. Hearths with a diameter of 8 to 12m have become more common, and productivity has increased rapidly. However, the erosion of furnace body refractory bricks and bosh refractory bricks has significantly affected blast furnace production, while traditional clay bricks Since its porosity is as high as about 20%, it is no longer suitable for use in existing blast furnaces

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