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Ceramic Foundry sand
Ceramic Foundry sand is a kind of refractory particle with diameter of 0.053-2.0mm.Mainly made of Al2O3·SiO2. It is ball-shaped particle made from bauxite,by high-temperature melting in electric-arc furnace, spraying and cooling.
Size: AFS25-35; AFS25-30; AFS30-35; AFS35-40; AFS40-45; AFS45-50; AFS40-50; AFS50-55; AFS55-60; AFS60-65.
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- PRODUCTS
- WHITE FUSED ALUMINA
- BROWN FUSED ALUMINA
- FREE DUST EMERY SAND CERAMIC SAND
- PINK FUSED ALUMINA
- ZIRCONIA FUSED ALUMINA
- BLACK SILICON CARBIDE
- FOUNDRY CHROMITE SAND
- GARNET SAND
- BORON CARBIDE
- CERAMIC FOUNDRY SAND
- TABULAR ALUMINA
- GLASS BEADS
- NATURAL EMERY
- GREEN SILICON CARBIDE
- BROWN FUSED ALUMINA
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Properties
Chemical Composition
|
SiO2 |
5– 15% |
|
Al2O3 |
70–85% |
|
Fe2O3 |
5%max |
|
TiO2 |
5%max |
|
MgO |
0.5%max |
|
K2O |
0.5%max |
|
CaO |
0.5%max |
Physical Character
|
Grain shape |
Perfect round ball shape |
|
Color |
Brown-Black |
|
Angle index |
1 .1 max |
|
Size rang |
0.053-3.36mm |
|
Loose Bulk Density |
1.9 – 2.1 g/cm3 |
|
Refractoriness |
2050℃ |
|
Liner thermal expansion |
(200℃ - 1000℃) 5×10-6/℃ |
Main Advantage
|
1 |
Stabe quality on the chemical composition |
|
2 |
Perfect grain round shape and various grain sizes |
|
3 |
High gas permeability |
|
4 |
High temperature resistance |
|
5 |
Good break down and fast curing and good release |
|
6 |
Perfectly round shape with higher fluidity improves fill-in efficiency while reducing the resin level |
|
7 |
Smooth surface of spherical shape greatly improves collapsibility after pouring |
|
8 |
Very low thermal expansion ensures fewer or no casting defects such as veining and deformation |
|
9 |
Excellent thermal conductivity and heat absorption capacity close to that of Zircon |
|
10 |
Superior refractory equivalent to Zircon and Chromites |
Application
- Widely used in foundry technique like resin-bonded sand, sodium silicate sand, and clay- bonded sand for sand core and casting mould making.
- Replace chromite sand and widely used in sand core making like jacket core, oil duct core, tappet core of engine.
- Replace chromite sand for steel casting facing sand and sub-layer of molding sand (backing sand).
- Widely used as dry sand and sand box for EPC process and V method of casting processes.
- Widely used as the main raw materials of advanced refractory products (Ladle drainage sand,gravity casting material, casting coating, etc).
- Widely used as cleaning sand for copper and aluminum alloy castings.
