CARBONACEOUS REDUCING AGENT FOR PRODUCTION OF TECHNICAL SILICON AND METHOD OF ITS PRODUCTION Russian patent published in 2020 - IPC C01B32/05 C10L5/10 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy and can be used for production of metals and alloys by reduction smelting in electric ore-recovery furnaces. Carbonaceous reducing agent contains following components, wt%: enriched brown and/or enriched black coal and/or semi-coke of brown and/or black coals 35–50; petroleum coke and/or charcoal 39–64; binder – balance. In order to obtain said carbonaceous reducing agent, initial components are first prepared by X-ray-radiometric enrichment of brown and/or black coal. Then, carbon materials are mixed in the mixer in the following order: first, enriched brown and/or enriched black coal is loaded and mixed and/or loaded brown coal and/or black coal semi-coke, with addition of petroleum coke and/or charcoal, and mixed with binder. After mixing briquette is formed and dried. Said carbonaceous materials are used in fraction less than 5 mm. In order to uniformly distribute carbonaceous materials over the cross-section of the briquette, denser materials are first loaded into the mixer, for example, in the following sequence: enriched coals, petroleum coke, semi-coke and charcoal.

EFFECT: reduced content of impurities in a carbonaceous reducing agent, particularly iron.

5 cl, 11 ex