Abstract: A method of continuously processing nickel-containing copper sulphide materials into blister copper, waste slag, and copper-nickel alloy includes oxidizing smelting along with SiO2 and CaO-containing fluxes and coal in a conversion furnace for conversion to produce blister copper, gases with concentration of SO2, and slag with an SiO2:CaO concentration ratio of 0.4:1 to 3:1, in which the sum of the iron, nickel, and cobalt is not more than 30 wt. %, at a specific oxygen consumption in the range of 150-240 Nm3 per ton of dry sulphide material, and depleting the slag in a separate reduction furnace, using a mixture of an oxygen-containing gas and a hydrocarbon fuel at an oxygen consumption coefficient (?) in a range of 0.5 to 0.9, while supplying coal in an amount of up to 15% of weight of the slag produced by the oxidizing smelting, to produce a waste slag and a copper-nickel alloy.

Abstract: The present method can be used for converting nickel-containing copper sulphide materials. A method for continuously converting nickel-containing copper sulphide materials into blister copper, waste slag and a copper-nickel alloy includes smelting the materials together with SiO2 and CaO-containing fluxes and coal in a Vanyukov converting furnace to produce blister copper, gases with a high concentration of SO2, and slag with an SiO2/CaO concentration ratio of from 3:1 to 1:1, in which the sum of the iron, nickel and cobalt concentrations is not more than 30 wt %, at a specific oxygen consumption in the range of 150-240 nm3 per ton of dry sulphide material for conversion, and depleting the slag in a separate unit, namely a Vanyukov reduction furnace, using a mixture of an oxygen-containing gas and a hydrocarbon fuel at an oxygen consumption coefficient (?) in a range of from 0.5 to 0.9, together with coal, to produce waste slag and a copper-nickel alloy.

Abstract: A method of processing waste gases containing sulphurous-acid anhydride comprises contacting said waste gases with an aqueous solution of sulphuric acid in the presence of oxygen or air and a catalyst comprising an inorganic manganese salt, such as manganese sulphate, perchlorate, chloride, nitrate or phosphate used in an amount of 0.0003-0.03 wt.% based on manganese ion to obtain an aqueous solution of sulphuric acid containing sulphurous-acid anhydride. This solution is subjected to the action of an agent for initiating the oxidation of sulphurous-acid anhydride comprising ionizing radiation to obtain an aqueous solution of sulphuric acid free from sulphurous-acid anhydride. A part of the sulphuric acid is derived from the cycle in the form of the resulting aqueous solution in an amount equivalent to the amount of the oxidized sulphurous-acid anhydride, and the remaining part of the sulphuric acid is fed for contacting with the waste gases.The method permits the processing of waste gases containing up to 0.