Semi-light Guimo brick for ferrosilicon ladle and preparation method thereof

Abstract

The invention belongs to the technical field of refractory materials, and particularly relates to a semi-light Guimo brick for a ferrosilicon ladle and a preparation method thereof, and mainly solvesthe technical problems that the conventional high-aluminum brick for the ferrosilicon ladle has a relatively high heat conductivity coefficient and poor insulation performance. The semi-light Guimo brick for the ferrosilicon ladle is characterized by being prepared from the following raw materials in parts by weight: 60-80 parts of high-aluminum bauxite clinker, 2-5 parts of a raw high-aluminum bauxite material, 3-8 parts of fine andalusite powder, 4-7 parts of fine silicon carbide powder, 2-6 parts of Suzhou soil, 3-10 parts of hollow aluminum oxide spheres, 1-3 parts of silica micropowder and 3.5-6 parts of silica sol. The preparation method of the semi-light Guimo brick for the ferrosilicon ladle comprises the following steps: 1), grinding and crushing; 2), performing mixed grinding onthe raw materials; 3), moulding and preparing a blank; 4), drying; 5), firing at high temperature; 6), cooling to obtain a finished product. The semi-light Guimo brick for the ferrosilicon ladle has the advantages of low cost, excellent heat shock-resisting stability, a low heat conductivity coefficient, high heat efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, in particular to a semi-light silicon molybdenum brick coated with ferrosilicon and a preparation method thereof. Background technique [0002] With the rapid development of my country's ferroalloy industry, submerged arc furnaces for ferroalloy production have made great progress in large-scale and intelligent in recent years. However, the ferrosilicon cladding working layer material used for ferrosilicon alloy tapping is generally made of high alumina bricks, which have a general ability to resist acid slag and liquid ferroalloy erosion; high thermal conductivity and poor thermal insulation performance, which will cause heat loss during the operation of the ferrosilicon cladding Larger; insufficient thermal shock resistance performance, resulting in heavy abnormal damage during use. There is a huge room for improvement in the material of the ferrosilicon-clad working layer. Cont...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, to provide a semi-light silicon molybdenum brick for ferrosilicon and its preparation method, and to solve the problems of high thermal conductivity and poor thermal insulation performance of the existing high-alumina brick for ferrosilicon. technical issues