Waste spark plug recycling method

The invention discloses a waste spark plug recycling method which comprises the following steps: disassembling a waste spark plug to obtain a central electrode, a side electrode and an electrodeless spark plug; sequentially carrying out ultrasonic cleaning and crushing treatment on the central electrode and the side electrode to obtain electrode powder; inorganic salt and an oxidizing agent are added into the electrode powder for roasting treatment; leaching the roasted electrode powder by using a leaching solution to obtain a leaching solution and leaching residues; extracting the leachate by using an oxime extracting agent to obtain a copper-loaded organic phase and a primary raffinate, and reextracting the copper-loaded organic phase to obtain a copper concentrated solution; precipitating the primary raffinate by using phosphate to obtain iron phosphate and supernate; extracting the supernate by using a neutral phosphorus extraction agent to obtain a platinum-loaded organic phase and ...