METHOD FOR MAKING BRIQUETTES Russian patent published in 2000 - IPC

FIELD: metallurgy, namely manufacture of briquettes from dispersed fractions (5 mm) of silicium-containing ferroalloys. SUBSTANCE: method comprises steps of mixing charge ingredients, pressing briquettes and processing them; using as binder superfinely dispersed silica from system for gas purifying at production of silicium-containing ferroalloys in quantity equal to (3-5)% of charge mass; moistening charge up to (6-8)% for 120-180 seconds directly before pressing by 10-30% with use of water solution of caustic soda. Usage of briquettes at melting low carbon ferrochrome for afterreducing chrome from slag before tapping out of furnace, effectively lowers residual content of Cr₂O₃ and irreversible losses of chrome together with dump slag. EFFECT: enhanced quality of briquettes, high efficiency of their production, low degree of oxidizing elemental silicium. 1 tbl