METHOD OF PRODUCING SILICON CARBIDE Russian patent published in 2017 - IPC C01B31/36 C04B35/565 

FIELD: chemistry.

SUBSTANCE: method includes dosing of silica-containing materials and carbonaceous reductants, loading them into an electric resistance furnace and conducting smelting reduction. First, around the core, a charge layer is loaded, containing quartzite with a fraction of 6-10 mm, then the following layer is loaded with a charge containing quartz sand and/or quartzite with a fraction of 0.3-6.0 mm, after which a charge layer containing quartz sand with a fraction less than that of the furnace is loaded into the upper part of the furnace and to the periphery 0.3 mm, and finely divided silica fraction 0.22 mm, with the following ratio of components of silica-containing raw materials, wt %: quartzite with a fraction of 6.0-10 mm - 20-30, quartz sand (quartzite) with a fraction of 0.3-6.0 mm - 50-70, quartz sand fraction less 0.3 mm - 5-8, finely divided silica fraction 0.22 mm - 5-15. Quartz sand fraction in amount of less than 0.3 mm and fine-grained silica before loading of the charge can be premixed with quartz sand with a fraction of 0.3-6 mm.

EFFECT: increasing the productivity of the process when using cheap silica-containing materials.

2 cl, 9 ex