Abstract:Spent hydrodesulphurization catalysts and spent automotive catalysts were used as raw materials to recover valuable metals from multi-source spent catalysts by reduction smelting applying laterite nickel ore to adjust slag composition. Effect of various conditions on recovery rate of valuable metals was systematically researched. The comprehensive experiment results show that recovery of Ni, Mo, V calculated by slag is 96.82%, 96.66% and 89.69%, respectively, and the recovery of Pt, Pd, Rh is 90.19%, 98.00% and 94.85%, respectively, under the optimum conditions including mass ratio of ore to spent catalysts of 1.5︰1, mass ratio of CaO to spent catalysts of 7.5%, smelting temperature of 1 525 ℃, and smelting time of 2 h. This process realizes the purpose of co-processing of primary ore and multi-source solid wastes to recover valuable metals.