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; AFS
25-30; AFS30-35; AFS35-40; AFS40-45; AFS45-50; AFS40-50; AFS50-55; AFS55-60; AFS60-65.
SiO2 | 5– 15% |
Al2O3 | 70–85% |
Fe2O3 | 5%max |
TiO2 | 5%max |
MgO | 0.5%max |
K2O | 0.5%max |
CaO | 0.5%max |
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℃ |
rmal expansion | (200℃ - 1000℃) 5×10-6/℃ |
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 srical shape greatly improves collapsibility after pouring |
8 | Very low thermal expansion ensures fewer or no casting defects such as veining and deformation |
9 | Exnt thermal conductivity and heat absorption capacity close to that of Zircon |
10 | Superior refractory equivalent to Zircon and Chromites |
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