FORFARANDE FOR BEARBETNING AV HYTTMELLANPRODUKTER, SULFIDISKA MALMER OCH/ELLER MALMKONCENTRAT

摘要

In the processing of sulfur-containing metallurgical intermediates, sulfide ores or ore concentrates at a flame temperature of at least 1500 DEG C. in which sulfur dioxide and a melt are formed, acid sludge from the acid treatment of petroleum and mineral oils is substituted for at least a portion of the fuel. The acid sludge contains at most 85% by weight of inorganic components and is preferably introduced through a lance together with the combustion-sustaining gas and any additional fuel, usually in the form of oil.