Casting sand like jewelry Bulk density: 1.95 to 2.05(g/cm3) Angle factor; <1.1 Shape: ball-shaped Size: 20 to 200 mesh Ceramic Sand features: 1, the thermal expansion coefficient is small, performance can be comparable with the zircon sand, sand with its preparation, no expansion of casting defects.2, sand for the ball, good fluidity, easy and good ventilation3, smooth surface, compact structure, ...