Fused Ceramic Sand is the custom ceramic particles with a spherical shape, high refractoriness and low thermal expansion being made by spraying the melted calcined bauxite. It provides a very simple but efficient way for the foundry-men to improving the quality of the castings, reducing the production cost and avoiding environmental pollution, because of that it has the higher price ratio comparing with Chromite sand and Zircon sand. At the present, it is acknowledged in the worldwide as the newest and the best ideal sand for the foundries and has a very wide feasibility of applications for the future development.
Comparison among the four commonly used foundry sands:
| NAME | Particle Shape | Refractoriness ℃ | Reclaimation rate | Bulk Density g/cm3 | Binder Amount
| Price | Mons’ hardness scale | Thermal Expansion | Environment |
| Silica sand | irregular | Around 1750 | Low | 1.4-1.5 | cheap | 7 | High | dust pollution | |
| Fused Ceramic Sand | Very close to sphere:it brings good air permeability& flowability | ≥1800 | High | 1.95-2.05 | Less than 30%-50% comparing with other sand | modestly priced | 8 | Low | environment-friendly |
| Chromite Sand | Irregular | 1830 | Low | 2.6-2.7 | modestly priced | 5.5-6.5 | Low | heavy metal pollution | |
| Zircon Sand | irregular | 2340-2550 | high | 2.9-3.1 | Very expensive | 7.5-8 | Very low | radioactive pollution |