South Africa foundry grade chromite sand specification

Foundry chromite sand is a natural process products of chromite through the broken screen classification, chrome ore, its main chemical composition of cr2o3, this kind of sand heated volume stability, high thermal conductivity, when in contact information with the molten metal, not only has good resistance to basic slag, not with ferric oxide and other chemical reactions, and itself has the characteristics of the solid phase sintering, can be a very good prevent the infiltration of molten metal, avoid to touch sand defects, suitable for all kinds of stainless steel, alloy steel and carbon steel gradually shape the original sand core and coating.

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Physics

Index

Chemistry

Index

Bulk Density

2.5-3g/cm³

Cr2O3

≥46.0% 

PH Value

7-9

SiO2

≤1.0%

Cr/Fe

1.55:1

Fe2O3

≤26.5%

   Filling Density

2.6 g/cm³

CaO

≤0.30%

Percent Moisture

≤0.1

MgO

≤10%

The sintered

1600°C

AI2O3

≤15.5%

Sintering Temperature

2180°C

P

≤0.003%

     Melting Point

>1800°C

C

≤0.003%

Regular size

                                 AFS 25-35 AFS25-30 AFS30-35 AFS35-40                                              AFS40-45 AFS45-50 AFS50-55 AFS55-60 AFS60-65

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