Properties/ designation

AM-90

AM-85

AM-70

Chemical compostion %

Al₂O₃

88-92

82-87

71-76

MgO

8-12

12-17

22-27

CaO

≤0.4

0.4

0.6

Fe₂O₃

≤0.35

0.35

0.35

SiO₂

≤0.25

0.4

0.4

Real density (g/cm³)

≥3.3

Grain size of section sand (mm)

0-1/1-3/3-5/5-8

Powder (mesh)

-180，-220,-240,-320

Usage

As the important raw material for manufacturing refractory products and fine ceramics, widely used in  refractory material products as for making the steel furnace roofs, converters and ladles, the ecotone bricks of large rotary cement kiln, and the glass furnace regenerators, etc.