Silicon carbide slurry prepared from waste silicon carbide deck and preparation method of silicon carbide slurry

Abstract

The invention discloses silicon carbide slurry using a waste silicon carbide deck. The silicon carbide slurry comprises the following components in percentage by mass: 20-40% of fine powder of the waste silicon carbide deck; 20%-40% of 97 silicon carbide fine powder; 20%-40% of 90 silicon carbide fine powder; 2%-4% of metal silicon powder; 1.5%-2.5% of silica powder; 3%-5% of Guangxi white mud; 0.8%-1.2% of an inhibitor; the total mass percent of the raw materials is 100%. 25-35 wt% of an aluminum dihydrogen phosphate solution is added as a binding agent. The obtained slurry has the advantages of full mortar joints and appropriate bonding time. The adhesive is high in normal-temperature bonding strength and medium-high-temperature bonding strength, high in refractoriness under load and high in heat conductivity coefficient, and does not emit pungent smell in the using process. The waste silicon carbide deck is fully utilized, secondary utilization of solid waste resources is achieved, and the cost is reduced. An aluminum dihydrogen phosphate solution is adopted as a binding agent, so that the pollution problem of a resin binding agent is avoided.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a silicon carbide slurry utilizing waste silicon carbide shed plates and a preparation method thereof. Background technique [0002] Electrolytic aluminum, steel, coking and other industries use a large number of silicon nitride and sialon bonded silicon carbide bricks, and silicon nitride bonded silicon carbide bricks. These bricks are used under harsh conditions and have high requirements for performance and life. These brick masonry are mainly bonded by mud, and the bonding material of mud is often the weak link of the material, so the development of high-performance silicon carbide mud is of great significance. [0003] A large number of silicon carbide shed plates are used in the production and manufacture of industrial ceramic products. Silicon carbide shed plates have the advantages of high temperature strength, oxidation resistance, corrosion resi...

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Problems solved by technology

The main problem is that the amount of clay used is too large and the high temperature performance of the material is insufficient

[0005] Patent 202010047107.7: An aluminum silicon carbide carbonaceous mud and its preparation method, the patent uses dense corundum powder, alumina powder, silicon dioxide powder, silicon carbide dust extraction powder, nano carbon black powder, boron carbide powder, metal silicon powder, Water is added to make mud. The problem of this patent is that the application range is narrow and the cost is too high

[0006] Patent 20121042602.0: A refractory mud for silicon carbide-carbon composite bricks and its preparation method uses silicon carbide, silicon dioxide powder, clay, phenolic resin powder, carbon black as raw materials, furan resin and sugar alcohol as binders to prepare mud, but The patented on-site binder is complex to modulate and produces harmful gases

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