In electric submerged-arc furnaces Silico-manganese is chemically manufactured by silico-thermic reduction, using manganese ores and/or slags from the production of ferro-manganese. In electric submerged-arc furnaces Silico-manganese is chemically manufactured by silico-thermic reduction, using manganese ores and/or slags from the production of ferro-manganese. Silicon Manganese is an alloy of manganese, silicon and iron. It is a cost- effective blend of manganese and silicon for the steel manufacturer. read more