C441 Sintered Ceramic Sand is a kind of sintering ceramsite sand. The raw material is inspected strictly and grinded in homogenization and then batch charged by numerical control to be granulated under great force to get accurate particle size distribution after balls sintered in the high temperature and then mixed according to grade. The C441 Sintered Ceramic Sand is a new inorganic material mainly composed of corundum phase and supplemented by mullite and andalusite phase.
Main chemical composition | Al2O3 |
Granular shape | Spherical，Coefficient of Angularity≤1.10 |
Refractoriness ℃ | ≥1820 |
coefficient of thermal expansion(1000℃） | 4.0~5.5 ×10-6/K |
Bulk density,g/cm3 | 1.50~1.60 |
Mineral phase organization | Corundum and mullite phases predominate, supplemented by rhodochrosite phases |
Feature | High refractoriness, low thermal expansion, Strong abradability |
Product Features
1、Refractoriness：Compared with chromite sand and Ceramic Sand, the refractoriness is basically equivalent or slightly higher, the high temperature compressive and heat resistance time is better, and the probability of sticking sand is greatly reduced.
2、Low expansion rate：The expansion rate is better than that of magnesium sand, chrome sand and silica sand, and is similar to that of Ceramic Sand, which is conducive to improving the precision size and surface and internal cavity quality of castings.
3、Low crushing rate：The Mohs hardness reaches 8.2, achieving an ultra-low crushing rate during mechanical grinding in the regeneration process.
4、PH value：It is a neutral material, suitable for various acid and alkaline binders (water glass, Piper resin, furan resin, phenolic resin, etc.), and does not change the existing binders used by customers.
5、Stacking specific gravity：The specific gravity of stacking is smaller than that of Ceramic Sand and chromite sand, which greatly reduces the ratio of sand to iron and lowers the casting cost; when mixed with silica sand, the shot sand is filled densely; during the curing process of sand core, there is no curing delamination, and the tendency of sand core deshelling is smaller.
