Petroleum Industries Ceramic Foundry Sand AFS60 AFS55 0.698W/M.K
1. Ceramic Foundry Sand Introduction
Ceramic Sand Spherical Foundry Ceramsite Sand
Ceramic sand ( ceramsite sand ) is an advanced substitute for quartz sand in the casting field. Ceramic sand is made from calcined bauxite with the main content of aluminum oxide processed by melting, blowing, sieving and blending. After melting calcined bauxite with 65-90% aluminum oxide in a high-temperature electric arc melting device, the outflow of ceramic blown into fine particles. Then after cooling and sieving, the ceramic sand become finished particles with different size grade.
2. Ceramic Foundry Sand Specifications
Thermal expansion :
| Sand Type | Linear thermal expansion | ||
| 20 – 300ºC | 20 – 600ºC | 20 – 800ºC | |
| Silice | 14.0 | 23.0 | 17.0 |
| Chromite | 7.1 | 7.5 | 7.5 |
| Zircon | 3.4 | 4.1 | 4.5 |
| Cerabeads | 3.5 | 4.0 | 4.3 |
| Ceramsite | 7.1 | 7.3 | 7.2 |
Compositions:
| Al2O3 | 78-85% |
| SiO2 | 8-12% |
| Fe2O3 | 3.5% (max) |
| TiO2 | 3.5% (max) |
| Refractoriness | 1850C (3362F) |
| Angle Coefficient | 1.1 (max) |
| Thermal Expansion (at 100°C) | 0.15 |
| Thermal Conductivity | 0.196 W/m.K |
| Specific Heat | 873 J/kg |
| Bulk Density | 1.9-2.2 g/cm3 |
| pH Value | 7.65 |
| Shape | Solid Sphere |
| Binder Content Required | 3-4% |
| Crushability | 113 |
3. Ceramic Foundry Sand General advantages
1. Low thermal expansion coefficient
2. High strength with good compressive strength and bending resistance ability and low broke rate.
3. spherical shape, good flowability, easy to shakeout
4. smooth surface, compact structure
5. chemically neutral material
6. high-temperature resistance, good refractoriness
7. Recycle up to 40 times, highly cost-effective.
4. Ceramic Foundry Sand Particle Size Distribution
| TYPICAL 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% |
| TYPICAL PHYSICAL PROPERTIES | |
| Refractoriness | ≥1800 ºC |
| Specific gravity: | 3.4g/cm3 |
| Bulk density(LPD): | 1.95-2.05 g/cm3 |
| Color: | black brown |
| Grit shape: | spherical ball |
| Thermal expansion coefficient | 6x10-6 /ºC(20-1000ºC) |
| Thermal conductivity | 0.698W/M.K(1200ºC) |
| Thermal expansion ratio | 0.13% |
| Angularity | ≤1.1 |
| Available sizes | |
| AFS15-20,AFS 15-25,AFS25-35,AFS25-30,AFS30-35,AFS35-40,AFS40-45,AFS45-50,AFS40-50,AFS50-55,AFS55-60,AFS60-65,AFS60-70,AFS70-80,AFS95-110 Customized sizes are available upon request | |
5. Ceramic Foundry Sand Application Area and its advantage compare to traditional casting sand
| Applications | Grit Size | AFS SIZE |
| Foundry sand for Lost foam | 8-15#(10#)10-20#,20-30# | AFS25-35 |
| Filler sand | 30# | |
| No bake sand including furan resin /alkaline-phenolic resin molding and core making/ Pep set /Sodium-silicate bonded sand | 30-50#,40-70#,50-70#,70-140# |
AFS35-45,AFS25-35,AFS45-55, AFS55-65,AFS60-70,AFS70-80 |
| Shell molding, resin coated sand casting | 50-100#,70-140#,100-200# |
AFS55-65,AFS60-70,AFS70-80, AFS95-110 |
| Lost foam casting coating | 140-270#,-200# | |
| Molding sand alcohol-based coating | -200# | |
| 3D printing, precision casting, investment casting | -140# |
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