Chromite sand is used as a highly fireproof sharpener for moulds and cores. Originally from South Africa . The sand is produced by crushing chrome ore and its washing in spiral concentrators, subsequent drying, dust cleaning, screening and sorting as per grain size.
Cr2O3 | 46.0%min |
SiO2 | 1.0%max |
FeO | 26.5%max.. |
CaO | 0.30%max.. |
MgO | 10.0%max |
Al2O3 | 15.5%max |
P | 0.003%max |
S | 0.003%max |
Cr/Fe | 1.55:1 |
Bulk Density | 2.5-3 |
Color | Black |
PH | 7-9 |
The amount of the acid | 2ML(MAX) |
Percent Soil | 0.1%max |
Percent Moisture | 0.1%max |
The Sintered | 1600℃ |
Percentage of Free Acid Present in the Sand | 0 |
Filling Density | 2.6 |
Sintering Point | 1800℃min |
Melting Temperature | 2180℃ |
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