The impact of butts on density of green anode and pitch consumption rate

A prebaked anode is made from mixture of petroleum coke, coal tar pitch and butts, it act as positive pole in reduction cells. An anode butts is the rest of the used anode (residual anode) removed from the cells during the anode changing. The butts content in the new anodes can be varied but normally it is between 15% and 25%. Smelters reused butts due to economic & quality aspect.Butts converted to coke have different characteristics such as chemical & density which has impact on pitch consumption, density of anode. For optimization of consumable pitch suitable for reused butts in anode, the amount of the pitch must be modified.This article reviews the impact of butts on consumption of pitch and green anode density.

Keywords:

coke , anode quality , optimization , pitch consumption , anode density