Method for comprehensive resource utilization of copper-nickel sulfide ore smelting slag

The invention relates to a method for comprehensive resource utilization of copper-nickel sulfide ore smelting slag, the method comprises the following steps: S1, mixing the copper-nickel sulfide ore smelting slag with an activating assistant (sodium hydroxide/sodium carbonate), grinding, roasting to obtain active clinker, and collecting furnace gas generated by roasting in the process; s2, leaching the active clinker with water to obtain water leaching residues and water leaching liquid; s3, carbonizing and decomposing the water immersion liquid, and filtering to obtain silica gel and filtrate; concentrating the filtrate and then applying to S1; s4, after roasting furnace gas is purified and combusted, introducing the gas into water to obtain sulfuric acid, adjusting the sulfuric acid to the proper concentration for leaching water leaching residues, and obtaining acid leaching residues and filtrate A; s5, heating and aging the filtrate A to obtain silica gel and filtrate B; s6, merging the silica gel generat