As of August 17, 2013, Sterlite Industries (India) Limited was acquired by Vedanta Limited. Sterlite Industries (India) Limited operates as a non-ferrous metals and mining company with interests and operations in aluminum, copper, zinc, lead, silver, and commercial energy. The company is engaged in mining, smelting, and refining bauxite and alumina to produce primary aluminum in the form of ingots and wire rods, and aluminum rolled products, as well as offering by-products of the alumina refining process (vanadium sludge that is used in the manufacture of vanadium-based ferro alloys); and mining, smelting, and refining to produce copper cathode, copper rod, sulphuric acid, and phosphoric acid, as well as offering by-products of copper smelting operations (gypsum and anode slimes). It is also involved in mining, smelting, and refining zinc and lead to produce zinc ingots, lead ingots, and sulphuric acid, as well as producing silver ingots. In addition, the company offers by products, such as HydroFluoro silicic acid and ferro sand. It has operations in India, Australia, Namibia, South Africa, and Ireland. The company was incorporated in 1975 and is based in Tuticorin, India.