1. Slag causes melting and dissolution of magnesia
2. The oxidation of carbon
(1) Direct oxidation
The carbon in the MgO-C brick is directly oxidized by oxygen in the environment, generally occurring below 1400℃.
(2) Indirect oxidation
Indirect oxidation generally occurs above 1400℃, and indirect oxidation is divided into intrinsic oxidation and external oxidation.
3. Corrosion caused by molten steel flow
(1) The slag layer formed on the working surface of the magnesium carbon material could be washed away by the flow of the molten steel, or the slag is insufficient.
(2) Repeated heating and cooling during the production process and the stirring force of the molten steel may cause the structure of the material to relax.
4. Hot peeling and mechanical peeling.
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