Silicon carbide anti-skinning castable and preparation method thereof

Abstract

The invention discloses a silicon carbide anti-skinning castable and a preparation method thereof. The castable is prepared from the following raw materials in parts by weight: 20-25 parts of flint clay brick waste material, 18-23 parts of corundum brick waste material, 16-22 parts of magnesium aluminate spinel brick waste material, 7-12 parts of silicon carbide powder, 6-10 parts of silica fume,8-13 parts of aluminum oxide powder, 9-11 parts of calcium aluminate cement, 6-8 parts of silicon nitride powder, 0.1-0.25 part of explosion-proof fiber, 1-2 part of high-temperature binder, 0.5-1 part of water reducing agent and 6-9 parts of water. The preparation method of the castable comprises the following steps: crushing raw materials; preparing an initial mixture; and preparoffing the castable. The castable disclosed by the invention is good in anti-cracking performance; the silica fume reacts with oxygen at a high temperature to generate silicon oxide, so that large gaps between explosion-proof fibers and other substances are blocked, invasion and corrosion of other substances are avoided, the skinning resistance is good, and aluminum oxide can form an aluminum oxide protection layer on the outer side of the smooth surface of silicon nitride, so that the silicon nitride is prevented from reacting at a high temperature.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a silicon carbide anti-skinning castable and a preparation method thereof. Background technique [0002] Castable, also known as refractory castable, is a granular and powdery material made of refractory materials with a certain amount of binder. It has high fluidity and is formed by pouring. In contrast, the binder and moisture content are higher, and the fluidity is better, so the castable has a wider range of applications. The material and binder used can be selected according to the conditions of use. It can be directly poured into a lining, and can be poured or The vibration method is used to make prefabricated blocks. The components in the existing castables are easy to react with acid and alkali at high temperatures. At the same time, the gap between the explosion-proof fiber and other substances is too large, which will easily lead to the infiltration of external subst...

AI Technical Summary

Problems solved by technology

[0002] Castable, also known as refractory castable, is a granular and powdery material made of refractory materials with a certain amount of binder. It has high fluidity and is formed by pouring. In contrast, the binder and moisture content are higher, and the fluidity is better, so the castable has a wider range of applications. The material and binder used can be selected according to the conditions of use. It can be directly poured into a lining, and can be poured or The vibration method is used to make prefabricated blocks. The components in the existing castables are easy to react with acid and alkali at high temperatures. At the same time, the gap between the explosion-proof fiber and other substances is too large, which will easily lead to the infiltration of external substances, and the castables are easy to be corroded. resulting in crusting

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