Refractory chromite in granular form (chromite sand) is widely used in the foundry industry for both ferrous and non-ferrous castings, particularly in the automotive, shipbuilding and heavy-engineering sectors. The merits of chromite foundry sands include high refractoriness, good chemical stability, low thermal expansion – which means the mould retains a stable size – and high density and thermal conductivity (which promote rapid solidification of the casting).
|
Analysis |
Result % |
AFS |
51.59 |
|
Moisture |
0.01 |
+850 micron |
0.1 |
|
Cr2O3 |
46.05 |
+600 micron |
3.7 |
|
SiO2 |
1.00 |
+425 micron |
12.2 |
|
Al2O3 |
14.83 |
+300 micron |
40.3 |
|
CaO |
0.18 |
+212 micron |
25.1 |
|
MgO |
9,96 |
+150 micron |
10.1 |
|
FeO |
25.89 |
+106 micron |
4.1 |
|
Cr:Fe |
1.57:1 |
+75 micron |
2.9 |
|
P |
0.004 |
+53 micron |
1.1 |
|
S |
0.003 |
-53 micron |
0.4 |
|
215ppm |
Turbidity |
|
Acid Demand |
|
|
6.7 |
pH3 |
|
4.7 |
pH4 |
|
3.8 |
pH5 |