Method for recovering iron through microwave roasting of copper tailings

The invention belongs to the technical field of extraction of valuable metals from non-ferrous metal tailings, and particularly relates to a method for recycling iron from copper tailings through microwave roasting. The method comprises the specific steps that copper tailings and a calcium material are mixed to be uniform, microwave roasting is adopted, oxygen is introduced, roasting is conducted at the temperature of 800-1000 DEG C, roasting slag is crushed and ground and then mixed with an acid solution for iron leaching, the iron leaching rate is not lower than 92%, and an iron chemical product is obtained after leaching liquid is subjected to concentration-cooling crystallization and recrystallization impurity removal. The method has the beneficial effects that the fayalite phase in the copper tailings can be effectively converted and decomposed at the temperature lower than 1000 DEG C, the energy consumption is low, the wet leaching iron leaching rate is high, the technological process is short, operatio