| abstract |
A metallurgical process for extracting Ni, Co, Fe from laterite-nickel ore is disclosed. It concerns a comprehensive recovery and utilization of laterite-nickel ore, comprising the following steps: A) subjecting the laterite-nickel ore to a smelting process of sulfuration to produce low grade nickel matte; B) subjecting the molten slag coming directly from the sulfuration process to a smelting process of reduction in an submerged arc furnace to produce a semi-finished steel with Fe content higher than 80%, which is then refined into qualified steel in a converter; or, putting the molten slag into an arc furnace to produce qualified steel straight away; C) subjecting the low grade nickel matte to a sulfating roasting-acid solution leaching process to produce sulfuric acid and Fe concentrate with a grade higher than 60%; D) treating the Ni/Co leaching liquor by solvent extraction to produce cobalt containing salt. By using the present invention, advantageous effects have been shown in respect of process design, comprehensive utilization of resources, economic benefit and environment protection. |