FIELD: metallurgy.
SUBSTANCE: red sludge is melted in a fuel-oxygen skull melting unit, iron is reduced with carbon-bearing reducing agent, and the produced metal and slag are output separately. In addition, sludge is heated and dried in a drying device till humidity is 6-10% with the heat of exhaust gases of the melting unit with the temperature of 1750-1850°C with addition to wet sludge of 3-6% of the weight of lime production wastes. Dried sludge is loaded by means of a sealed loading device from the drying device onto molten slag heated to 1640-1680°C, at the speed of 1.2-1.4 tons per 1 m2 of the heel of molten slag per hour. Reduction of iron from molten charge is performed by means of carbon-bearing materials loaded onto the slag in the quantity providing the content of iron oxides in the final reduced slag within 3-5%. Separate drainage of melting products is performed continuously or periodically, thus maintaining vibrations of the molten metal level in the melting unit of not more than by 200-300 mm by changing the drain speed and the quantity of melting products.
EFFECT: creation of high-efficiency single-stage processing process of red sludges and simplification of the processing process.
8 cl, 3 ex, 2 tbl
