FERROCHROME ALLOY PRODUCTION

摘要

This invention relates to a process for recovering ferrochrome alloy and chrome from slag containing entrained ferrochrome alloy and Cr2O3. In the process, slag is mixed with a molten ferrochrome metal phase containing silicon (known as "charge chrome" or "high carbon ferrochrome") under suitable conditions for silicon present in the metal phase to reduce Cr2O3 in the slag phase in a silicothermic reduction reaction to chromium, which reports to the metal phase; and thereafter separating an end slag phase from an end metal phase. This process allows chrome recovery in the production of ferrochrome from smelting of chromium ore to be increased from a typical amount of about 70% to 84%, to more than 90%, typically about 95%.