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Silicon carbide mullite wear-resisting casting material

A mullite and castable technology, applied in the field of silicon carbide fused mullite wear-resistant castables, can solve the problems of chemical erosion, large amount of dust, heavy alkaline components, etc., to improve high-temperature service performance and save energy. The effect of resource and consumption saving

Active Publication Date: 2014-05-28
长兴兴鹰新型耐火建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Due to the high temperature, the amount of dust in the medium is large, the scouring effect is strong, and the alkaline content of the dust is heavy. It is easy to cause chemical erosion to the working lining of the refractory material of the cement kiln equipment. The alkaline component reacts with the working lining material at high temperature to form a low-temperature liquid phase, and the liquid phase further penetrates and erodes the deep layer of the working lining material, affecting the performance of the working lining material , shorten the service life of the working lining, resulting in frequent damage to the working lining material, and the rotary kiln has to be shut down frequently for emergency repairs

Method used

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  • Silicon carbide mullite wear-resisting casting material
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Embodiment 1

[0032] Silicon carbide fused mullite wear-resistant castable includes the following components and the mass percentage of each component is: aggregate 50%, fine powder 20%, micropowder 12%, compound additive 10%, binder 6%, Hot fiber steel 2%, preferably, the castable is only composed of aggregates, fine powder, micropowder, composite additives, binders and heat-resistant fiber steel, and one part of the aggregate includes electrofusion with a particle size of 0.1-8mm. 50% mullite aggregate, 20% silicon carbide aggregate with a particle size of 0.1-3mm, 20% silicon mullite brick aggregate and 10% high alumina bauxite aggregate, one fine powder includes electrofusion with particle size ≤180 mesh 30% mullite fine powder, 55% fine silica mullite powder with particle size ≤320 mesh and 15% fine silicon carbide powder, the fine powder is a combination of silicon dioxide fine powder and activated alumina fine powder, or the fine powder is dioxide The combination of silicon micropowd...

Embodiment 2

[0035] Silicon carbide fused mullite wear-resistant castable includes the following components and the mass percentage of each component is: aggregate 65%, fine powder 10%, micropowder 18%, compound additive 3%, binder 3%, Hot fiber steel 1%, preferably, the castable is only composed of aggregates, fine powder, micropowder, composite additives, binders and heat-resistant fiber steel, wherein, one part of the aggregate includes electrofusion with a particle size of 0.1-8mm. 70% mullite aggregate, 10% silicon carbide aggregate with a particle size of 0.1-3mm, 10% silicon mullite brick aggregate, 10% high alumina bauxite aggregate, one fine powder includes electrofusion with particle size ≤180 mesh 55% fine mullite powder, 30% fine silica mullite powder and 15% fine silicon carbide powder with a particle size of ≤320 mesh. The discarded silica mullite bricks that are replaced are broken and obtained, and the micropowder is a combination of silica micropowder and activated alumina...

Embodiment 3

[0037] Silicon carbide fused mullite wear-resistant castable includes the following components and the mass percentage of each component is: aggregate 58%, fine powder 15%, micropowder 15%, compound additive 6%, binder 4%, Hot fiber steel 2%, preferably, the castable is only composed of aggregates, fine powder, micropowder, composite additives, binders and heat-resistant fiber steel, and one part of the aggregate includes electrofusion with a particle size of 0.1-8mm. 60% mullite aggregate, 15% silicon carbide aggregate with a particle size of 0.1-3mm, 15% silicon mullite brick aggregate, and 10% high alumina bauxite aggregate. One fine powder includes electrofusion with a particle size of ≤180 mesh 40% mullite fine powder, 40% fine silica mullite powder with particle size ≤320 mesh and 20% fine silicon carbide powder. Said silica mullite brick aggregate and silica mullite fine powder are dismantled during maintenance and replacement through cement rotary kiln. The discarded s...

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Abstract

The invention discloses a silicon carbide mullite wear-resisting casting material which comprises the following components in percentage by mass: 50-65% of aggregate, 10-20% of refined powder, 5-20% of micro powder, 3-10% of a composite additive, 3-6% of a binding agent and 1-2% of thermal resisting fiber steel. As mullite aggregate and silicon carbide aggregate are adopted as the aggregate, the casting material has properties of good temperature resistance, scouring resistance, erosion resistance and thermal shock resistance; as the silicon dioxide micro powder and the activated aluminum oxide micro powder are introduced and the ratio of the silicon dioxide micro powder to the activated aluminum oxide micro powder is adjusted, the high-temperature strength, the wear-resistance and the corrosion resistance of the material are greatly improved; a waste material, namely, silicon-mullite bricks, is utilized, so that the energy is saved, the emission is reduced, the high-temperature application property of the casting material is improved, and through addition of organic and inorganic composite additives, the high-temperature application property of the casting material is improved.

Description

technical field [0001] The invention relates to a silicon carbide fused mullite wear-resistant castable. Background technique [0002] Due to the high temperature of the tertiary air duct straight pipe, elbow, kiln head cover slope, straight wall, grate cooler low wall and other parts of the cement rotary kiln, the amount of dust in the medium is large, the scouring effect is strong, and the alkaline component in the dust is heavy. It is easy to cause chemical erosion to the working lining of the refractory material of the cement kiln equipment. The alkaline component reacts with the working lining material at high temperature to form a low temperature liquid phase. , shorten the service life of the working lining, resulting in frequent damage to the working lining material, and the rotary kiln has to be shut down frequently for repairs. SUMMARY OF THE INVENTION [0003] The problem to be solved by the present invention is to provide a silicon carbide fused mullite wear-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王强许高
Owner 长兴兴鹰新型耐火建材有限公司
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