Ceramic foundry sand is made of high quality bauxite, through the process of electrofusion, granulation, screening and so on,which is made of very ball-like refractory particles.
Ceramic foundry Sand for Casting Chemical and Physical index
Shape | Round |
Color | Dark brown |
Bulk density | 1.95-2.05g/cm3 |
Real density | 3.4g/cm3 |
Refractory temperature | ≥1800℃ |
Thermal expansion | 0.13% |
Thermal conductivity | 0.698W/M.K |
Angularity | ≤1.1 |
Chemical composition
Composition | Content(%) |
Al2O3 | >70 |
SiO2 | 15-25 |
Fe2O3 | <3 |
TiO2 | <3.5 |
CaO | <0.45 |
MgO | <0.35 |
K2O | <0.33 |
Na2O | <0.08 |
Applications
1 | Widely used in foundry technique like resin-bonded sand, sodium silicate sand, and clay- bonded sand for sand core and casting mould making |
2 | Replace chromite sand and widely used in sand core making like jacket core, oil duct core, tappet core of engine. |
3 | Replace chromite sand for steel casting facing sand and sub-layer of molding sand (backing sand). |
4 | Widely used as dry sand and sand box for EPC process and V method of casting processes. |
5 | Widely used as the main raw materials of advanced refractory products (Ladle drainage sand,gravity casting material, casting coating, etc.). |
6 | Widely used as cleaning sand for copper and aluminum alloy castings |
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