ceramic fused sand as foundry material

Ceramic fused sand is an advanced foundry material that offers superior properties compared to traditional silica sand.

1. What is Ceramic Fused Sand?

  • A synthetic sand made by melting and spheroidizing high-purity alumina or zirconia at high temperatures.

  • Forms spherical, dense particles with high refractoriness and thermal stability.

2. Key Properties

  • High Refractoriness (up to 1800°C) – Suitable for high-temperature alloys (steel, iron, superalloys).

  • Low Thermal Expansion – Reduces casting defects like veining and metal penetration.

  • Chemically Inert – Resists reactions with molten metal, improving surface finish.

  • Spherical Shape – Enhances flowability and reduces binder usage (~30% less than silica sand).

  • Reusability – Can be reclaimed multiple times with minimal degradation.

Chemical Analysis[%]
Al2O370-73
SiO28-20
Fe2O3≤3
TiO2≤3.5
CaO≤0.45
MgO≤0.35
K2O≤0.33
Na2O≤0.08
Physical Properties
Grain shapeSpherical Ball
Roundness90%
Refractoriness:>1790℃
Shape Coefficient≤1.1
Thermal Expansion Ratio0.13%(Heated up for 10 min at 1000℃)
Thermal expansion coefficient6×10-6 /℃(20-1000℃)
Thermal conductivity0.698W/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

3. Applications in Foundries

  • Cores & Molds – Used in precision casting (investment, shell molding).

  • High-Performance Alloys – Ideal for steel, stainless steel, and Ni-based superalloys.

  • Complex Geometries – Better dimensional accuracy due to low expansion.

4. Advantages Over Silica Sand

✔ Less Veining & Rat Tails (due to low thermal expansion).
✔ Better Surface Finish (reduced metal penetration).
✔ Lower Binder Consumption (cost savings).
✔ Environmentally Friendlier – Less waste generation, reusable.

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