Item

Index

Superior grade

First grade

Regular grade

Moisture content /%≤

2.0

3.0

4.0

Hydrochloric acid insoluble matter content /%≤

0.10

0.15

0.20

Calcium oxide(CaO) /%≤

0.43

0.70

1.0

Magnesium oxide /%>

41.0

40.0

38.0

Burnt loss /%>

54-58

54-58

52

Chloride(calculated with CL) /%≤

0.10

0.15

0.30

Ferric(Fe) /%≤

0.02

0.05

0.08

Manganese(calculated with Mn) /%≤

0.004

0.004

-

Sulfate(calculated with SO2 4) /%≤

0.10

0.15

0.30

Screening residues(150um) /%≤

0.025

0.03

0.05

Screening residues(75um) /%≤

1.0

-

-

Buil density /(glml)≤

0.12

0.14

-