Silicon oxide refractory castable and using method thereof

A refractory castable and silicon oxide technology, which is applied in the field of silicon oxide refractory castables, can solve the problems of restricting the application of refractory castables, low softening temperature under load, and low high-temperature strength, etc., and achieve excellent thermal shock resistance and softening temperature High, lining stability effect

Active Publication Date: 2013-05-08
成都蜀冶新材料有限责任公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of CaO in the material, the eutectic phase is bound to be produced, resulting in a lower load softening temperature and lower high-temperature strength of this type of castable.
At the same time, high-quality high-alumina ore raw materials are gradually depleted, and the price has risen sharply. Two factors have seriously restricted the application of this type of refractory castable in high-temperature fields.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] Silica-based refractory castables are composed of aggregates, powders, coagulants and external binders, and are:

[0061] A. Aggregate is composed of calcined silica, broken material of recycled waste silica bricks or a mixture of the two, the total amount of which is 60-70% of the sum of the mass of aggregate and powder. Of which SiO 2 Calcined silica with a content ≥ 95% and a particle size of 3-6mm, 1-3mm and 0.5-1mm respectively, the crushed material of waste silica brick recycling or the mixture of the two, the amount of which is the sum of the aggregate and powder masses 35%, 20% and 10%.

[0062] B. The powder is composed of calcined silica powder and silica micropowder or ultrafine quartz sand, the total amount of which is 30-40% of the sum of aggregate and powder mass. Of which SiO 2 The amount of calcined silica powder ≥95%, particle size ≤320 mesh is 27% of the sum of aggregate and powder mass, SiO 2 ≥95%, average particle size d 50 The amount of 2μm sil...

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PUM

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Abstract

The invention discloses a silicon oxide refractory castable and a using method thereof. The castable consists of aggregate, powder, a coagulant and an external binding agent, wherein the aggregate consists of calcined silica, scrap for a waste silica brick recyclable material and a mixture of the calcined silica and the scrap, and the total amount accounts for 60-70 percent of the sum of mass of the aggregate and powder; the powder consists of calcined silica powder and silica powder or superfine quartz sand, and the total amount accounts for 30-40 percent of the sum of mass of the aggregate and powder; the coagulant is fettling magnesite grain powder, and the total amount accounts for 2-4 percent of the sum of mass of the aggregate and powder; and the external binding agent is an aqueous solution of phosphoric acid and aluminium dihydrogen phosphate, and the total amount respectively accounts for 3-5 percent and 8-12 percent of the sum of mass of the aggregate and powder. The silicon oxide refractory castable has high-temperature performances of high load softening temperature, high high-temperature strength, wide application temperature range, stable high-temperature size and excellent thermal shock resistance and is wide in raw material distribution, high in yield, low in cost and convenient to popularize and apply.

Description

technical field [0001] The invention relates to a refractory castable and a method for using the same, in particular to a silicon oxide refractory castable and a method for using the same. Background technique [0002] The low-cement, ultra-low-cement combined with high-alumina refractory castables widely used in the market at present have significantly improved high-temperature performance compared with traditional cement-based refractory castables. "Low cement refractory castable" is one of them. However, due to the presence of CaO in the material, the eutectic phase is bound to be produced, resulting in a lower load softening temperature and lower high-temperature strength of this type of castable. At the same time, high-quality high-alumina ore raw materials are gradually depleted, and prices have risen sharply. Two factors have seriously restricted the application of this type of refractory castable in high-temperature fields. Contents of the invention [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张命荣
Owner 成都蜀冶新材料有限责任公司
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