Sustainable Mining and Metallurgy

The amount of carbon dross is an important index of the performance of reactive pre-baked anode in aluminum electrolysis. The generation of carbon dross and quality fluctuation of anode are related to the non-standard operation of aluminum electrolysis. There are many factors affecting the quality of anode, including the quality of raw material, the formula of raw materials, the production process and so on. This paper introduced the practice of the carbon-dross-free anode production technology in the aspects of anode production raw material preparation, forming process improvement, roasting process operation. Processing aggregate calcined coke is prepared by mixing technology ; the storage temperature of binder coal tar pitch should be controlled, and the content of components and trace elements should be homogenized by mixing different quality asphalt, and the residual anode should be treated by advanced residual anode cleaning technology; the anode block forming process and the roasting process were optimized；the anode surface was treated. Finally, the anode quality was gradually improved and the amount of carbon slag was continuously reduced.