... with a series of complement materials,such as special refractories, special alloy products in North of Henan region.owning ... furnace metallurgical plant (a 12500 KVA submerged arc furnace), special alloy smelting workshop (two), not stereotypes refractories, milling agents ... ferro silicon magnesium,iron sulfide, barium, and other special alloy Alumina 10,000 tons; drainage of premium burden, and other ...