Aluminium is a power intensive industry. The electrolysis process used to produce Aluminium requires large quantities of electrical power, cost of which is almost one-third of the total cost involved in production of Aluminium. The Direct Current (DC) required depends on the total number of cells or pots installed and the potline current involved. For meeting this huge power requirement most Aluminium smelters are equipped with their own Captive Power Plants.
BALCO's existing potline works on prebaked technology with a rated potline current of 320 kA which is presently being ramped to 330 kA. Attempts are on to gradually increase this to 340 kA and subsequently to 400 kA.