NOUFERROUS METALLURGICAL EQUIPMENT

This paper studies the feasibility of the process of producing metallized nickel matte from secondary nickel concentrate by periodic operation of “oxygen-enriched side-blowing oxidation smelting+centralized reduction of slag”. The results show that the nickel content in the slag can be reduced from 7.63% to 0.66% after centralized reduction treatment, producing metallized nickel matte (Ni+Cu≥76%, Fe＜3%, S: 16%-20%), which achieves the goal of the short “melting, iron removal, sulfur reduction” process of secondary nickel concentrate. The optimum process parameters are concentrate with the ratio of oxygen to feed of 10-45Nm3/t and reductant ratio of 0.5%-1%. The periodic operation method of “oxygen-enriched side-blowing bath smelting+centralized reduction of slag” can produce metallized nickel matte, significantly improve the product yield of nickel anode plates, increase the heat utilization rate, production efficiency and capacity, and reduce production cost.