Environment-friendly magnesia-chrome brick for steel refining and non-ferrous metal smelting and preparation method thereof

Abstract

The invention relates to an environment-friendly magnesia-chrome brick for steel refining and non-ferrous metal smelting. The magnesia-chrome brick is prepared by the following raw materials in parts by weight: 5 to 25 parts of magnesia sand particles with the particle size of greater than 1 mm and less than or equal to 3 mm, 5 to 15 parts of magnesia sand with the particle size of greater than 0 mm and less than or equal to 0.088 mm, 5 to 25 parts of magnesia-chrome sand with the particle size of greater than 3 mm and less than or equal to 5 mm, 5 to 20 parts of magnesia-chrome sand with the particle size of greater than 1 mm and less than or equal to 3 mm, 10 to 30 parts of magnesia-chrome sand with the particle size of greater than 0 mm and less than or equal to 1 mm, 5 to 15 parts of chrome ore with the particle size of greater than 1 mm and less than or equal to 3 mm, 5 to 15 parts of chrome ore with the particle size of greater than 0 mm and less than or equal to 0.088 mm, 5 to 10 parts of magnesia-chrome waste brick powder with the particle size of greater than 0 mm and less than or equal to 0.088 mm, and 1 to 6 parts of bonding agent. Compared with the prior art, the environment-friendly magnesia-chrome brick for the steel refining and non-ferrous metal smelting has the beneficial effects that the production cost is reduced, economic benefits are remarkable, practical significance and profound historical significance are brought for solving the problems of international industrial cancer, improvement of ecological environment and benefit of human health.

Description

technical field

[0001] The invention relates to the technical field of magnesia-chrome refractory materials, in particular to an environment-friendly magnesia-chrome brick for iron and steel refining and nonferrous metal smelting and a preparation method thereof. Background technique

[0002] Magnesium-chromium refractories are inorganic non-metallic materials and basic refractory products. They have excellent properties such as high refractoriness, corrosion resistance and spalling resistance. They are still an irreplaceable key basic material for global steel refining and non-ferrous metallurgy. However, under high temperature, alkaline and oxidizing atmosphere, Cr in magnesia-chrome refractories 3+ The ions will be converted into Cr with strong carcinogenicity, DNA fragmentation, reproductive toxicity, and genotoxicity 6+ Ions are harmful to human body and environment. Developed countries strictly regulate Cr in magnesia-chrome bricks 6+ The content must be controlled ...

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