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Product Details:
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| Model No.: | NFS20-25~NFS55-60 | Thermal Expansion Coefficient: | 6X10-6 /ºC(20-1000ºC) |
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| Thermal Conductivity: | 0.698W/M.K(1200ºC) | Type: | Long Time Material |
| Angularity: | Max 1.11 | Feature: | Low Crushing Ratio |
| High Light: | 0.698W/M.K Fused Ceramic Sand,AFS Fused Ceramic Sand,SGS Fused Ceramic Sand |
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1. Ceramic Foundry Sand Introduction
Ceramic Foundry Sand, technically named as “Fused Ceramic Sand for Foundry”, also named as ceramite, is good spherical grain shape which is made from calcined bauxite. Its main content is aluminum oxide, and it is processed by melting, blowing, sieving and blending. Ceramic sand, has much better properties than that of silica sand to gain a better performance in foundry.
Size: NFS25-35; NFS25-30; NFS30-35; NFS35-40; NFS40-45; NFS45-50; NFS40-50; NFS50-55; NFS55-60; NFS60-65.
2. Ceramic Foundry Sand Specifications
| Sand Type | Linear thermal expansion | ||
| 20 – 300ºC | 20 – 600ºC | 20 – 800ºC | |
| Silica | 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 |
| Al2O3 | 78-86% |
| SiO2 | 8-13% |
| 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
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 | 0.12% |
| 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 Applications
Ceramiste has similar properties with chromite in thermal conductivity, thermal expansion and refractories only lower density compared with chromite. In the shape and particle strength, ceramsite is much better.
But the price is only half of that of Chromite. So Ceramsite will be good choice for large size steel castings.
Contact Person: Jason Chen
Tel: 86-18603794999
