Ceramic sand , technically as fused ceramic sand for foundry, is made from calcined bauxite which main content is aluminum oxide, processed by melting, blowing, sieving and blending. Ceramic sand has excellent properties, including spherical shape, high refractoriness, good crush resistance, inert chemical characteristics, high reclamation yields, etc. To solve the problem of metal penetration and burn-on, veins and sometimes sand sintering at riser pad of heavy steel casting, foundry men take advantages of using alkaline phenolic resin boned sand or sodium silicate bonded sand with ceramic sand, finding that those problems and defects are successfully solved. And, the waste sand and dust emission are remarkably reduced.
Chemical and Physical Composition:
Chemical Analysis[%] | |
Al2O3 | 70-75 |
SiO2 | 8-20 |
Fe2O3 | ≤3 |
TiO2 | ≤3.5 |
CaO | ≤0.45 |
MgO | ≤0.35 |
K2O | ≤0.33 |
Na2O | ≤0.08 |
Physical Properties | |
Grain shape | Spherical Ball |
Roundness | 90% |
Refractoriness: | >1790℃ |
Shape Coefficient | ≤1.1 |
Thermal Expansion Ratio | 0.13%(Heated up for 10 min at 1000℃) |
Thermal expansion coefficient | 6×10-6 /℃(20-1000℃) |
Thermal conductivity | 0.698W/M.K(1200℃) |
Specific Gravity:: | 1.95-2.05g/cm3 |
Bulk density(LPD): | 3.4 g/cm3 |
Color: | Black |
AVAILABLE SIZES | |
AFS25-35,AFS35-45,AFS45-55,AFS55-65,AFS60-70,AFS70-80,AFS95-110 Customized sizes are available upon request | |
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