Silico Manganese is an alloy with 60% to 70% manganese, 14% to 16% silicon, and 1.5% to 2% carbon. It is produced by smelting of slag from high-carbon Ferro Manganese or of Manganese ore with coke and a quartz flux. Smelting temperatures are high and greater energy is needed to reduce the quartz to silicon. So, the process requires power consumption of about 3,800 to 4,800 kilowatt-hours per tonne.

There are three variants of Silico Manganese:

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• High Carbon Silico Manganese
• Medium Carbon Silico Manganese
• Low Carbon Silico Manganese