LIQUID-PHASE SEPARATION OF SOLID-PHASE REDUCTION PRODUCTS OF RICH CHROMIUM ORES
Keywords:
chrome ore, pre-reduction, liquid-phase separation, carbothermal reduction, solid-phase reduction, selective reduction, degree of extraction, chrome spinel, ferrichrompicotite, carbon ferrochrome, chromium carbide, quartz shell.Abstract
The paper presents the results of the experimental study of the effect of solidphase metallization time on the yield and composition of metal obtained by subsequent liquid-phase separation kempirsai, chrome, ore, fines (l ...2 mm) fluxed with quartzite were subjected to solid-phase metallization sintering at 1400°C in mixture with coal and then separated into metal and slag at 1850°C. It is found that 2 hours of metallization even at relatively low temperature 1400°C to reduce and extract more than 80% of chromium and 90% of iron, and the degree of extraction of both metals after 3 hours of metallization reaches 95%. The structure of the metal obtained after the liquid-phase separation of reduction products is similar to the structure of carbon ferrochrome. The metal contains carbides (Cr,Fe)23C6, and (Cr,Fe)7C3, and silicidesFeSi; and Cr3Si. Increasing reduction sintering time enriched in chromium
