Ceramsite for heavy steel Casting

• Main Chemical Element: Al2O3≥75% , Fe2O3≤5%, TiO2≤5%, SiO2 5%-20%, other element: trace amounts;
• Shape: Ball shape;
• Angle Factor: ≤ 1.1, very close to ball shape;
• Thermal Expansion : 0.13% (10 minutes at 1000℃)
• Product description:
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