Category

SiO₂ (%)

Al₂O₃%

MgO%

Na₂O%

CaO%

viscosité

Drilling mud

50 to 65

15 to 25

2 - 3

>2

< 1

≥ 30

Foundry

50 to 65

15 to 25

2 - 3

-

-

-

Discoloring earth

50 to 65

15 to 25

3 - 5

-

< 1

-

Pelletizing

50 to 65

15 to 25

2 - 3

> 1

-

-