Vedanta will invest up to Rs 3,000 crore in copper operations to double the capacity to 8 lakh tonne by 2019, making the firm India?s largest producer of the metal. The company is currently awaiting some approvals for the project. The firm has a custom smelter, a refinery, phosphoric acid plant, sulphuric acid plant, copper rod plant and three captive power plants at Tuticorin as well as a refinery and two copper rod plants at Silvassa. The company has been granted around 250 acre of land by the Tamil Nadu government in the special economic zone area in Tuticorin, where it will set up another smelter of 400 kilotonne capacity.