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  FERROUS   Sand   Chromite Sand  
 
Chromite Sand
  DESCRIPTION

Chromite sand has black color, the chemical formulation as FeO.Cr2O3. it has basic property. The specific gravity is 4.3-4.6, the hardness is 5.5-7 Mohr and thermal expansion at 0.005. Chromite sand has rather high thermal conductivity, the melting point at 1760-1980 °C
Chromite sand comes from natural and by product of Ferro Chromium smelting, for the chrimite sand which come from natural it always found some iron (Fe) including then the melting point is low. Chromite sand in natural is come from Cr ore, it not is the sand same as silica sand in natural. Thus we need to crush it and washing then screen to the suitable for foundry, for this reason as a result chromite sand has high price. Now the chromite sand has a lot in South Africa.


ORIGIN: South Africa

ADVANTAGE OR BENEFITS:
• Have high melting point then high the refractoriness.
• Have high thermal conductivity.
• Good to prevent sand burn problem.

 

   
  STANDARD SPECIFICATION
  Cr203 SiO2 Fe203 MgO AL203 CAO MOISTURE
Standard 46%Min 1% Max 25-27% 9-11% 15-16% 0.5% Max 0.2% Max