A kind of method for smelting chromium-nickel iron with laterite nickel ore
A technology of laterite nickel ore and ferronickel, which is applied in the field of iron and steel metallurgy, can solve the problems of hidden danger of environmental pollution, deterioration of smelting performance, and low chromium content in nickel and iron, so as to reduce production costs, improve resource utilization, and reduce chromium content. Effect
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Embodiment 2
[0043] The laterite nickel ore is mixed with nickel sulfide ore accounting for 5% of its mass, the amount of chromite and stainless steel pickling sludge and stainless steel dust accounts for 5% of the laterite nickel ore, and the amount of desulfurized gypsum and steel slag accounts for 5% of the laterite nickel ore. 6% of the quality of nickel ore; after adding the above materials, the sulfur content in the mixed material is 2%, the calcium oxide content is 5%, the aluminum oxide content is 6%, the mass ratio of magnesium oxide to silicon oxide is 0.64, and the fluoride content is 1.5%, FeO content in slag is 8%. According to the general technological process of rotary kiln-electric furnace smelting ferronickel, after the above materials are mixed and dried, semi-coke accounting for 6% of the mass of laterite nickel ore is added as a reducing agent; it enters the rotary kiln for pre-reduction at 800°C, and the calcined sand is hot-charged into the electric furnace , the smel...
Embodiment 3
[0045] Nickel sulfide ore accounts for 5% of the laterite nickel ore, chromite and stainless steel pickling sludge and stainless steel dust account for 6% of the laterite nickel ore, and desulfurized gypsum and steel slag account for 6% of the laterite nickel ore. 8% of the quality of nickel ore; after adding the above materials, the sulfur content in the mixed material is 2.5%, the calcium oxide content is 6%, the aluminum oxide content is 6%, the mass ratio of magnesium oxide to silicon oxide is 0.64, and the fluoride content is 1.7%, FeO content in slag is 13%. After the above-mentioned mixed material is dried in a drying kiln, semi-coke accounting for 6% of the mass of laterite nickel ore is added as a reducing agent; the mixed material is put into a rotary kiln for pre-reduction at 800°C, and the calcine is hot-charged into an electric furnace at a melting temperature of 1580°C. The total metal content in chromium-inconel products is 97%, of which the metal chromium conte...
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