The Aluminum Corporation of China Ltd. (also known as Chalco or Chinalco) is China's largest refined aluminum producer. ... Norsk Hydro is a major producer of bauxite, alumina, and refined aluminum products. The company, which employs 22,000 people worldwide, has plants in Rjuken, Raufoss, Vennesla, Karmoy, Hoyanger, Ardal, Sunndalsora ...