South Africa Chromite Sand 46% Cr2O23
Casting Chrome ore sand is a kind of foundry sand with high refractoriness. The content of chromium oxide of casting chromite sand should be at least 46%. That will get high Solid-phase sintering temperature. Chrome ore sand is especially featured with its high thermal conductivity. It can not only make the casting steel cool quickly, but also prevent casting iron& steel from sand-sticking.
Chromite Sand Sand Features：
1. High melting point, high sintering temperature
2. Excellent thermal stability
3. High density, high density
4. Medium Mohs hardness 5.5
5. High thermal conductivity
6. Low coefficient of thermal expansion
2. Excellent thermal stability
3. High density, high density
4. Medium Mohs hardness 5.5
5. High thermal conductivity
6. Low coefficient of thermal expansion
Chemical Composition
|
Item |
Unit |
Index |
|
Cr2O3 |
% |
≥46.0% |
|
SiO2 |
% |
≤1.0% |
|
FeO |
% |
≤26.5% |
|
CaO |
% |
≤0.30% |
|
MgO |
% |
≤10.0% |
|
Al2O3 |
% |
≤15.5% |
|
P |
% |
≤0.003% |
|
S |
% |
≤0.003% |
|
Cr/Fe |
|
1.55:1 |
Physical Properties
|
Bulk Density |
g/cm³ |
2.5-3 |
|
Color |
/ |
Black |
|
PH |
/ |
7-9 |
|
The amount of the acid |
/ |
≤ 2 ML |
|
Percent soil |
% |
≤0.1 |
|
Percent Moisture |
% |
≤0.1 |
|
The sintered |
℃ |
1600 |
|
Percentage of free acid present in the sand |
% |
0 |
