Process on the Waste Carbon Lumps Used for Cathode in Electrolysis Alumina

As it is well known, the main material of cathode carbon used in aluminium industry is calcined anthracite.The general anthracite carbon cathode used in alumina reduction cell after about 4 months can become graphitizatio.

 

 

The waste cathodic carbon blocks generally contain C, NaF, Na3AlF6, A1F3, CaF2, Al2O3 and other components, including C about 65-75%.

 

Cathode carbon block with larger size been used for metal smelting as fuel and the small size been used for carbon electrode or anode paste.