Method for separating and recycling valuable metal from copper smelting ash through multi-section controlled atmosphere roasting

The invention discloses a method for separating and recycling valuable metal from copper smelting ash through multi-section controlled atmosphere roasting. The method includes the steps that copper ash, a binder and water are evenly mixed and pelletized; and after green balls are dried, first-section weak oxidization low-temperature roasting for recycling arsenium, second-section oxidation medium-temperature roasting for removing sulphur and recycling cadmium at the same time, third-section strong oxidation high-temperature roasting for recycling lead, fourth-section weak reduction high-temperature roasting for recycling tin and fifth-section strong reduction high-temperature roasting for recycling zinc are sequentially conducted, roasting residues are copper-rich residues, and the processdirectly returns to the copper pyrometallurgical process. By means of the method, stepped extraction and high-efficiency recycling of main valuable elements, including arsenium, cadmium, lead, tin, zinc and copper, in the co