1.It is 22M Mullite Sand.
2.It is made in Wellchina Guangdong of CHINA.
3.It is used in precision casting.

1.The  22M  Mullite Sand  is  made by kaolin clay.

2.It is used  for stuccoing  in precision  casting  shell-making.

3.Its tolerance is 1750 °C.

4.It is used  in outer  layer  for  investment  casting  shell-making.

5.Its color is gray and  white.

6.Chemical   ingrediant

46%≥Al2O3≥42%,

53%≥SiO2≥51%,

1.2≤Fe2O31≤1.5%,

Na2O+K2O ≤0.3%,

CaO+MgO2 ≤0.6%,

TiO2≤0.1%.

7.Physical   indicator

density≥2.5g/cm3,

specific gravity ---2.6g/cm3,

water include< 0.03%,

fire resistence≥1750°C,

Reduction  burning≤0.3-0.4%,

Degree  of dust  ≤0.01-0.03%,

PH 7-9,

shell-hardness>8.0Mpa.

8.Pouring  the casting , easy   shelling, no distortion, reduced scale is not easy, finish good, high yield.