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Ferro Manganese

Ferro Manganese is an alloy with high percentage of manganese, which is made by heating a mixture of oxides, MnO2 and Fe2O3 with high carbon content in blast furnace or an electric arc furnace-type system. The oxides go through carbothermal reduction in the furnaces that result in producing Ferro Manganese. Ferro Manganese is used as deoxidizer and desulfurizer for production of steel.

There are three variants of Ferro Manganese:

• High Carbon Ferro Manganese
• Medium Carbon Ferro Manganese
• Low Carbon Ferro Manganese

Specification Ferro Manganese
FeMn HC MC
  65 - 70 Grade 70 - 75 Grade 75 - 80 Grade 75% Grade 70% Grade
Mn  65% - 70% Min  70% - 75% Min  75% - 80% Min 75% Min 70% Min
Si 1.5% Max 1.5% Max 1.5% Max 2% - 4% Max 2% - 4% Max
C 6% - 8% Max 6% - 8% Max 6% - 8% Max 1.5% Max 1.5% Max
P 0.35% Max 0.35% Max 0.35% Max 0.35% Max 0.35% Max
S 0.03% Max 0.03% Max 0.03% Max 0.03% Max 0.03% Max

Silico Manganese

Silico Manganese is an alloy with 65% to 68% manganese, 16% to 21% 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:

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

Specification of Silico Manganese
SiMn HC MC LC ELC
  60/14 Grade 65/15 Grade 65/16 Grade 70/16 Grade 55/25 55/25 55/60
Mn 60% Min 65% Min 65% Min 70% Min 55% - 60% Min 55% - 60% Min 55% - 60% Min
Si 14% Min 15% Min 16% Min 16% Min 20% - 25% Min 25% - 30% Min 25% - 30% Min
C 2.50% Max 2.25% Max 2% Max 2% Max 0.5% Max 0.2% Max 0.1% Max
P 0.35% Max 0.35% Max 0.35% Max 0.30% Max 0.15% Max 0.15% Max 0.15% Max
S  0.03% Max  0.03% Max  0.03% Max  0.03% Max 0.03% Max 0.03% Max 0.03% Max

Ferro Chrome

Ferro Chrome is an alloy with 58% to 65% chrome, 8.5% max carbon, 0.05% max phosphorus, 4% max silicon and 0.05% max sulphur. With a chrome content from 60% minimum, there are several variations on High Carbon Ferro Chrome with carbon contents of.

Size
Specification of Ferro Chrome
SiMn High Carbon Ferro Chrome
Cr 58 to 65%
C 8.5% Max
Si 4% Max
P 0.05% Max
S 0.05% Max