Is it legal to separate metals from the slag produced by waste incineration power plants?

Legal. Garbage power plants come from domestic garbage. Needless to say, iron, aluminum, copper and other common metals can also extract gold, but rarely, garbage power plants generally have iron remover, but the function is not very good, only a small part can be extracted. Incinerator is an environmental protection device that incinerates waste gas, waste liquid, solid waste fuel, medical waste, domestic waste, animal carcasses, etc. at high temperature, so as to reduce or reduce the quantity and at the same time achieve partial utilization.