New Delhi, Oct. 29 -- Vedanta Resources, the mining and energy company controlled by Indian billionaire Anil Agarwal, proposes to scale up the $1 billion investment in its Zambian copper unit to develop multiple tailing leaching facilities required to enhance copper production from secondary sources, said CEO Deshnee Naidoo in an interview.

The plan is to capture large secondary sources of copper, such as tailings from Konkola Copper Mines (KCM), which will help Vedanta enhance copper production at its Zambian copper unit. Vedanta acquired KCM in the early 2000s but regained control only last year, following an extended period of differences with the Zambian government and a legal battle over the control of KCM.

A tailing leaching facil...