ZHENGZHOU YINCHENG ABRASIVES CO after more than a year of efforts by absorbing advanced technology from foreign countries, and to hire foreign experts scholars to teach guidance and dispatched officers to crack higher studies, continuous exploration and practice. in November 2005 developed an ZJFH150×150×(5-70) boron carbide armor protection products
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High-purity fused aluminum-magnesium spinel


    Fused aluminum-magnesium spinel is smelted from high-purity light magnesium and industrial aluminum in electric arc furnace. With its good colour, high bulk density and resistance to thermal shock and chemical corrosion at high temperature, this material is widely used for making high performance castables,silide nozzle, ladle linings brick, the proof of EAF and basic oxygen furnace, intermediate zone of cement rotary kiln, etc.
Indicators of physical and chemical properties:

Type

AM—50

AM—70

AM—85

Index

Guarantee value

Typical
value

Guarantee value

Typical
value

Guarantee value

Typical
value

Chemical composition（%）

AL2O3

49-54

53.7

71-76

74.12

82-87

83.76

MgO

42-47

43.92

22-27

24.66

12-17

15.57

CaO

≤0.8

0.64

≤0.65

0.39

≤0.5

0.16

SiO2

≤0.6

0.43

≤0.4

0.29

≤0.4

0.19

Fe2O3

≤0.6

0.35

≤0.4

0.19

≤0.4

0.13

True density(g/cm3)

≥3.40

3.50

≥3.20

3.35

≥3.20

3.39