PROCESSING METHOD OF RAW MATERIALS CONTAINING NON-FERROUS METALS AND IRON Russian patent published in 2008 - IPC C22B23/02 C22B4/06 

FIELD: metallurgy of non-ferrous metals.

SUBSTANCE: invention pertains to the metallurgical industry, predominantly to the metallurgy of nickel and cobalt. It concerns procurement methods of liquid metals with reprocessing of an oxygenized, metal-containing natural raw material and technogenic materials. This method works in the follow manner: the melted slag of a fusion mixture, consisting of initial material, flux agent, liquid and firm slag, carbon-containing material and oxygen in an oxygen-containing forced draught, is introduced into an oxygenized area of the twin-chambered furnace. The fusion mixture must be provided in appropriate quantities that would guarantee complete burning of carbon and the highest heat emission. Thereafter a fusion of slag is performed, resulting in the liquid slag formed. The product is then introduced into the recreation area along with the carbon-containing material, oxygenated draught and additional fluxes in such quantities as deemed sufficient to, firstly, restore oxides of obtained metals in the metal phase and, secondly, to indemnify for the lost thermal expenses. The relations between expenses of an oxygenated material per ton of the obtained material in the oxidative and restorative areas must be maintained within the 0.3-2.5 range, and a specific oxygen consumption rate in these areas should be preserved within the range of 0.7-3.0. Periodically, prior to an emission of the metal component of the fused products in the slag siphon, it is heated with an electric arc at the border between the sintered and metal baths until the 1350 - 1500°C range of temperatures is finally reached. Before emitting of the metal component, the molten mass must be kept still for some 10 to 15 minutes while electricity has to be switched off on electrodes. The technical result of this process increases extraction of metals and is a significant improvement of division between the sintered and metal baths.

EFFECT: improvement of the metal extraction when the raw materials, containing non-ferrous metals and iron, are reprocessed.

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