Corundum breathable seat brick with high thermal shock resistance and production method thereof

Abstract

The invention discloses a corundum breathable seat brick with high thermal shock resistance. The brick consists of mixed corundum, a magnesium-containing material, a binding agent, chromium oxide, a water reducing agent and an explosion-proof agent. The production method of the corundum breathable seat brick comprises the following steps: dosing, and mixing to prepare mud; placing the mud in a mould, performing shake densification, demoulding, and drying to obtain a breathable seat green brick; and heating the breathable seat green brick, and roasting to obtain the corundum breathable seat brick with thermal shock resistance. The component ratio is reasonable, the production and preparation method is simple, the prepared breathable seat brick has good high-temperature strength and thermal shock resistance; and the service life of the breathable seat brick can be effectively prolonged, the use security of the breathable brick can be increased, the replacement times of the breathable brick can be reduced, the production cost of enterprises can be reduced and the production efficiency of ferrous metallurgy can be increased. The corundum breathable seat brick can replace the existing breathable seat brick and be suitable for industrial production.

Description

technical field [0001] The invention relates to a corundum breathable seat brick used in the process of blowing argon into molten steel in a ladle in iron and steel smelting, in particular to a corundum breathable seat brick with high thermal shock stability and a production method; it belongs to the technical field of refractory materials. technical background: [0002] The ability of a material to resist sudden temperature changes without damage, that is, not to generate cracks, peeling, cracks, and fragments, is called thermal shock stability, and it is also called resistance to rapid cooling and rapid heating. [0003] The breathable seat brick is a refractory brick built on the bottom of the steel drum to fix the breathable brick. The breathable seat brick is very critical to the use of the breathable brick. Its most basic function is to fix the breathable brick and make the replacement of the breathable brick simple and efficient. At the same time, the seat brick can p...

AI Technical Summary

Problems solved by technology

Due to poor thermal shock resistance, the air-permeable seat brick often cracks, peels off or even breaks during use

Especially for small and medium-sized steel mills, due to the poor continuity of production, frequent temperature changes, and a large range of changes, the cracking, peeling and fracture of the air-permeable seat bricks are particularly serious, which greatly affects the service life of the air-permeable bricks and increases production and leakage. Therefore, it is of great practical significance to produce breathable seat bricks with high thermal shock stability