Ferroalloy Ferro silicon: SI: 65%, 72%, 75% Size: 10-100mm or at buyer' ... equipment and craftwork, exceeded technology research and development, and excellent quality and service as business foundation, it invests a great deal ... constructed, 4×25000KVA manganese silicon alloy lines, 8×6300KVA metallic silicon lines, 6×25500KVA calcium carbide lines, silicon carbide and environment protection lines ...