Explain, with the help of a half equation how oxide ions are oxidised during the electrolysis of aluminium oxide. Extracting aluminium from its ore is expensive because its electrolysis requires a ...

The oxygen reacts with the carbon anodes, forming carbon dioxide. So the anodes gradually wear away. They must be replaced frequently, adding to the cost of producing aluminium.

Vedanta, a powerhouse in aluminium, zinc, copper and energy ... iron removal and subsequent residual metal recovery. By extracting iron, a cleaner feedstock is generated for downstream processing.

Aluminium, copper, and alumina are integral ... said Birla Copper is setting up India's first e-waste recycling plant, extracting and recycling metals from discarded devices.