Oil well usedceramic foundry sand Bulk density: 1.95 to 2.05(g/cm3) Shape: ball-shaped Size: 20 to 200mesh Ceramic Sand ... ventilation3, smooth surface, compact structure, making the binder cover evenly4, ceramic materials, sand neutral, acid, alkali binder apply5, re-use regeneration ... (Sodium silicate +CO2 sclerosis )3-4%7-8%7-8% Oil well used ceramic foundry sand