1. 
   Silicomanganese
   Silicomanganese (SiMn), a ferroalloy with high contents of manganese and silicon, is made by heating a mixture of the oxides manganese oxide (MnO2), silicon dioxide (SiO2), and iron oxide (Fe2O3), with carbon in a furnace. They undergo a thermal decomposition reaction. It is used as a deoxidizer an...
   Found op http://en.wikipedia.org/wiki/Silicomanganese
   
   
2. 
   silicomanganese
   (from the article `manganese processing`) 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 ...
   Found op http://www.britannica.com/eb/a-z/s/95
   
   

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