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Chalco, with full name of Aluminium Corporation of China Ltd,  is the the  leading enterprises of nonferrous metals in China. It is an comprehensive large scale integrity enterprise  including bauxite and mining, coal resources exploration, alumina, aluminium and aluminium alloy products production, marketing, technology research and development, international trade, logistics industry, thermal power, new energy power generation. There are 39 existing subsidiaries and branches all over China.  Chalco owns the world's largest chemical alumina capacity. One of the main plant is Chalco shandong co., LTD., with an annual production capacity of900,000 tons.With the core technology of 5 series of chemical aluminas amounted more than 120 grades …