BRIQUETTE CONTAINING SILICON-CONTAINING RESIDUES (VERSIONS) AND METHOD OF BRIQUETTE PRODUCTION Russian patent published in 1998 - IPC

FIELD: briquette containing silicon-containing residues and methods of its production. SUBSTANCE: silicon-containing residues accumulated especially in synthesis of organosilanes from metallic silicon and methyl chloride are worked to form briquettes which are subsequently used as addition for regulation of quality of pig iron in cupolas to avoid use of expensive regeneration of valuable components or full rejection to waste of the silicon-containing residues. Briquettes also includes 1-10 wt.% of cardboard fiber, 5-40 wt. % of hydraulic cement and 2-20 wt.% of additional additions which affect the quality of pig iron. Briquettes are produced silicon-containing residues with cardboard fiber and hydraulic cement and subsequent addition to mixture of water and formation of briquettes from produced paste mixture by pressing. Diameter of briquette cross-section is about 20 mm and height about 50 mm. Briquettes are stable enough mechanically and thermally, stable for operation in melting furnace. Index of utilization of silicon particles of small sizes introduced into pig iron amount to 85% that is equal to that of lumpy ferrosilicon. EFFECT: higher efficiency. 7 cl, 1 tbl