Refractory material for direct current electric arc furnace bottom and preparation method thereof

Abstract

The invention discloses a refractory material for a direct current electric arc furnace bottom. The refractory material is composed of the following raw materials by weight part: 6-10 of steel powder, 3-4 of terpene resin, 2-3 of phenolic resin, 17-20 of zirconium boride, 30-40 of zinc powder, 60-67 of graphite in soil form, 10-14 of flax fiber, 2-3 of glacial acetic acid, 26-30 of tetraethyl orthosilicate, 80-102 of 6-10% ammonia water, 100-110 of 3-5% hydrogen peroxide, 2-3 of potassium borohydride, 3-4 of scolecite, 0.1-0.13 of trimethylolpropane, and 3-4 of dimethyl carbonate. The tetraethyl orthosilicate involved in the invention is hydrolyzed into silanol sol under the condition of adding the catalyst glacial acetic acid, the silanol sol is mixed with a fiber activation solution and an ultrasonic dispersion solution prepared from scolecite, by evaporation of the solvent, a heterocomplex containing calcium, carbon and silicon can be obtained, and finally high temperature carbonization is carried out, and the carbon source is provided by the fiber activation solution, thus obtaining a carbon silicon calcium composite additive. The carbon silicon calcium composite additive has the advantages of stable chemical properties, high heat conductivity coefficient, small thermal expansion coefficient, thermal shock resistance, light weight, and high strength.

Description

technical field [0001] The invention relates to a refractory material, in particular to a refractory material for the bottom of a DC electric arc furnace and a preparation method thereof. Background technique [0002] Refractory materials refer to a class of inorganic non-metallic materials with a refractoriness not lower than 1580°C. Refractoriness refers to the Celsius temperature at which a refractory conical sample can resist high temperature without softening and melting without load. However, it is not possible to fully describe refractory materials only by the definition of refractoriness, and 1580°C is not absolute. It is now defined as a material whose physical and chemical properties allow it to be used in a high temperature environment is called a refractory material. Refractory materials are widely used in metallurgy, chemical industry, petroleum, machinery manufacturing, silicate, power and other industrial fields, and are used in the largest amount in the met...

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Problems solved by technology

However, it is not possible to fully describe refractory materials