Improvement of melting technology of nickel and copper sludge cakes in metallurgical shop of copper plant of MMC Norilsk Nickel
- G.V. Plekhanov Saint Petersburg Mining Institute
Abstract
MMC Norilsk Nickel uses the process of drying coke cuprum-pyrite sludge and nickel sludge on secondary anodes to produce platinum metal concentrates. The process is characterized by high temperature, low stability of lining (furnace working cycle-7 days) and significant emission of powder and gas mixture. In laboratory conditions a structural loading has been developed, which allows to reduce the process confusion temperature by 200-250°C. To achieve this result, it is proposed to carry out technological mixing with the formation of slags, which are between silicate and bisilicate by acidity. The slags are characterized by low mixing temperature and viscosity, which provides reduction of losses with them of platinum metals.