The invention relates to a method for reducing
nickel ore by using a reducing
rotary kiln and producing ferronickel by rusting an electric furnace, which comprises the following steps: placing
red soil ferronickel ore, reducing
coal, a desulfurizing agent and additives into the
rotary kiln for direct reduction, further performing selection, rusting, and
smelting the high-grade ferronickel by the electric furnace, wherein the
nickel grade is not less than 20%; and simultaneously recovering
ferric oxide red, and using a
waste material to manufacture burning-free bricks. The process flow is as follows: preparing raw materials, directly reducing via the
rotary kiln, cooling via a cooling
kiln, performing the selection, rusting, and
smelting by the electric furnace. The particle size of the
coal is required to be not more than 15mm, the particle size of
lime is less than 2mm, primary air and secondary air are adopted for burning the
coal, the
calcination time is 2.5-9 hours, the temperature in the
kiln is 500-1180 DEG C, the materials are cooled to below 38 DEG C by the cooling
kiln, the selection is performed for removing impurities, the rusting is performed for removing the impurities, the
smelting is performed by the electric furnace, and then the
nickel content in the ferronickel is not less than 20%. The method is simple, the technology is advanced, the
energy conservation and the emission reduction are realized, the cost is low, the quality is high, and the degree of
mechanization and the degree of
automation are high, large-scale production is benefited, large market is achieved, the competitiveness is strong, environment friendliness is achieved, significant
economic benefits is obtained, good
social benefits and environment-friendly effect are achieved, and further a new way for refining nickel from the
red soil ore is .