China Ceramsite Foundry Sand Introduction of Ceramic Foundry Sand Ceramic foundry sand, also known as ceramsite in China, is an advanced substitute of quartz sand in the casting industry. Even though quartz sand is widely distributed and easy to obtain and low in cost, it has obvious disadvantages such as large expansion coefficient, low casting precision, serious adhesion to the surface of the casting, and difficulty in cleaning the sticking sand. But the ceramic foundry sand can overcome these disadvantages and improve the quality of castings. Technical Parameter 1. Main Chemical Element:Al2O3鈮?5% , Fe2O3鈮?%, TiO2鈮?.5%, SiO2 鈮?7%, other element: Trace amounts; 2. Grain shape: Spherical; 3. Angle Factor: 鈮?1.1, very close to ball shape; 4. Bulk Density: 1.95-2.05 (g/cm3); 5. Refractoriness: 鈮?800鈩? 6. Thermal Conductivity: 5.27W/M路K(1200鈩?; 7. Shock Expansion Rate: 0.13% (10 minutes at 1000鈩? 8. Particle Size: 0.053mm-2.0mm Product Data Sheet SizeMesh10141826365070100140200281PanAFS Range 渭m170011808506004253002121501067553Pan AFS20 鈮?10-3030-5015-35鈮?http://www.tosupplychain.com/c....eramsite-foundry-san