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Baked sand:
 With the clean deep underground water as the water source, baked sand for foundry is processed by 6 times washing and rubbing the raw sand, 3 times removing clay and then drying under high temperature (300°C－450°C). Baked sand has characters of low water content and less impurity and is mainly used for high grade coated sand, chemical, coating, grinding and eletronic industry.
Baked Sand property
Group Code |
Radius |
Chemical Composition(%) |
Clay |
L.O.I |
ADV |
Sintering Point |
Angle Coefficient |
Concent-ration |
/cm² |
mm |
SIO2 |
AI2O3 |
Fe2O3 |
K2O+Na2O |
CaO+MgO |
% |
% |
ml |
℃ |
|
% |
30/50 |
0.3-0.6 |
≥96 |
<3.0 |
<0.20 |
<1.50 |
<0.30 |
<0.30 |
≤0.30 |
≤4.0 |
>1700 |
1.15 |
>90 |
40/70 |
0.21-0.43 |
≥96 |
<3.0 |
<0.20 |
<1.50 |
<0.30 |
<0.30 |
≤0.30 |
≤4.0 |
>1700 |
1.15 |
>90 |
50/100 |
0.30-0.15 |
≥96 |
<3.0 |
<0.20 |
<1.50 |
<0.30 |
<0.30 |
≤0.31 |
≤4.0 |
>1700 |
1.15 |
>90 |
70/140 |
0.21-0.11 |
≥96 |
<3.0 |
<0.20 |
<1.50 |
<0.30 |
<0.30 |
≤0.30 |
≤4.0 |
>1700 |
1.15 |
>90 |
140/70 |
0.11-0.21 |
≥96 |
<3.0 |
<0.20 |
<1.50 |
<0.30 |
<0.30 |
≤0.30 |
≤4.0 |
>1700 |
1.15 |
>90 |
100/200 |
0.07-0.15 |
≥96 |
<3.0 |
<0.20 |
<1.50 |
<0.30 |
<0.30 |
≤0.30 |
≤4.0 |
>1700 |
1.15 |
>90 |
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