1) Co:10-12%. 2) Grain size: 0.5-0 ... venture of Jiangxi Golden Dragon Mining Co., Ltd. Of Jiangxi, and the United States K Engineering Co., Ltd., It's from 2002, ... , 2, 000 tons of tungsten carbide powder, and 1, 500 tons of mixture. It's a science ... and technology enterprise capable of tungsten mining, ore dressing, smelting, and milling, In addition, it and has the right to operate import and export ...