Finally,the most reasonable technological process of“stagewise grinding,coarse and fine classification,gravity separation magnetic separation reverse anionic flotation”has been found out.
By technique checking every operations of recovery circuit,calculating the classification of spitzkasten and cyclone,thickening efficiency,assaying the ash of every operations.
The interface device called SELCALL CONTROLLER is essential to transform the call process in air-ground communication from manual operation to automatic control.