Chromite sand is a naturally occurring spinel consisting primarily of the oxides of chrome and iron.It is a by-product of ferro-chrome production and is mainly used in foundry applications and in glass production.
Origin: South Africa
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Cr2O3
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≥46.0%
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SiO2
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≤1.0%
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FeO
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≤26.5%
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CaO
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≤0.30%
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MgO
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≤10.0%
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Al2O3
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≤15.5%
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P
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≤0.003%
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S
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≤0.003%
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Cr/Fe
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1.55:1
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Bulk Density
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2.5-3g/cm3
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Color
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Black
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PH
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7-9
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The amount of the acid
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≤ 2 ML
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Percent soil
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≤0.1
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Percent Moisture
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≤0.1
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The sintered
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1600℃
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Percentage of free acid present in the sand
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0
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filling density
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2.6g/cm3
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sintering point
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> 1,800℃
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melting temperature
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2,180℃
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0-1mm 1-3mm
AFS 25-35 AFS25-30 AFS30-35 AFS35-40 AFS40-45 AFS40-50 AFS40-70 AFS45-55 AFS45-50 AFS50-55 AFS55-60 AFS60-65 200mesh 325mesh 400mesh etc
Chromite Sand in the foundry industry Its properties enable the material to be used in high duty grey iron and steel foundries as core and mould making sand. Its high thermal conductivity gives it good chilling properties, low thermal expansion gives rise to good dimensional stability. Its basicity being close to neutral allows the use of a wide range of resin bonding systems and inorganic binders, it has a high refractoriness and a broad sieve distribution.
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