Abstract: According to the isothermal phase diagram of a slag system calculated from FactSage 6.4 software， a high-aluminum system with w(Al₂O₃)about 30% was chosen as the target slag. The recovery of palladium from spent catalyst was carried out by using iron powers as the collector and smelting in MF induction furnace. The effects of binary basicity of the slag system and the amount of collector on the recovery rate of palladium were studied， and the composition and micro-morphology of the alloy and tail slag were analyzed. The results show that when the smelting temperature is 1550℃， the binary basicity(m_CaO/m_SiO2)of the slag system is 0.6， and when the mass ratio between the iron powder and spent catalyst is 0.2， the recovery rate of palladium is up to 99%， leading to the greatest recovery efficiency. The tailings stand a dark green glass state with the palladium content less than 5g/t， and the mass fraction of palladium enriched in the ferroalloy is 0.76%. The results indicate the recovery of palladium resources in spent catalyst can be realized efficiently.

Key words: secondary resources, recovery, spent catalyst, palladium, glassy slag, induction smelting