Silicomanganese

Silicomanganese

Silicomanganese (SiMn) is an alloy mostly used in steelmaking and foundry activities.  This alloy, containing 65 to 68 percent manganese, 16 to 21 percent silicon, and 1.5 to 2 percent carbon, is produced by the smelting of slag from high-carbon ferromanganese or of manganese ore with coke and a quartz flux. Smelting temperatures are higher than in ferromanganese production, and greater energy is needed to reduce the quartz to silicon, so that power consumption is 3,800 to 4,800 kilowatt-hours per ton.

The carbon content of the alloy is significantly lowered by the presence of silicon. Further removal of carbon can occur on cooling, owing to the formation of silicon carbide, which floats to the top of the metal and is collected in the slag. A silicomanganese of even lower carbon content (less than 0.1 percent) can be obtained by re-smelting silicomanganese with more coke and quartz. This product is used as a reducing agent in the manufacture of low-carbon ferromanganese.

For a complete listing of silicomanganese specifications, see ASTM A483.

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McCreath Laboratories will send trained, experienced technicians to take a represented sample for you.  Whether in bulk or containers, our technicians have the training, tools and experience to collect a representative sample, ensuring that all subsequent laboratory testing is accurate and reliable.  With our mobile crushing units, silicomanganese in lump form can be partially processed on site per the ISO and ASTM standards, increasing efficiency and reducing the amount of material taken off-site.

 

Professional Sample Analysis With McCreath Labs

McCreath Laboratories will employ both classical and advanced in-house techniques in the analysis of silicomanganese.  The techniques have been verified through the use of certified reference materials and some are adopted directly from ASTM or ISO standards.  A typical ferrochrome analysis would be done as follows:

ElementTechniqueInstrumentReference Method
MnTitrationMetrohm TitrandoASTM E248
SiGravimetricN/AASTM E360
CCombustionLECO CS 744ASTM E1019
SCombustionLECO CS 744ASTM E1019
PICPThermo ICAPIn house
AsICPThermo ICAPIn house
SnICPThermo ICAPIn house
PbICPThermo ICAPIn house
CrICPThermo ICAPIn house
NiICPThermo ICAPIn house
MoICPThermo ICAPIn house

For more information on the analysis of silicomanganese, contact us.