Comprehensive recycling method of waste FCC (fluid catalytic cracking) catalyst

The invention discloses a comprehensive recycling method of a waste FCC (fluid catalytic cracking) catalyst. The method comprises the following steps: S1, performing magnetic separation on the waste FCC catalyst to obtain a low-magnetic agent and a high-magnetic agent; s2, the high-magnetism agent is ground into fine powder through a ball mill, and high-magnetism agent fine powder is obtained; returning the low-magnetism agent to an oil refinery after the low-magnetism agent meets the standard through a micro-reaction activity test; s3, the high-magnetic agent fine powder is subjected to secondary magnetic separation, and a metal-free material and a metal-containing material are obtained; s4, uniformly mixing the metal-containing material with a residual oil waste catalyst and sodium carbonate in proportion, and performing high-temperature roasting in a rotary kiln to obtain clinker; s5, the clinker is put into a leaching tank, clear water is added for soaking, and leaching liquid and tailings are obtained af