Index name

Index

First grade

Liquid

Solid

Mass fraction of alumina (AL2O3)/% ≥

10.0

29.0

Basicity/%

40-90

40-90

Density (20oC)/(g/cm3)≥

1.12

-

Mass fraction of water insoluble matter/% ≤

0.2

0.6

PH (1% aqueous solution)

3.5-5.0

Mass fraction of arsenic (As)/% ≤

0.0002

Mass fraction of lead (Pb)/% ≤

0.001

Mass fraction of cadmium (Cd)/% ≤

0.0002

Mass fraction of mercury (Hg)/% ≤

0.00001

Mass fraction of hexavalent chromium (Cr+6)/% ≤

0.0005

Note: The liquid products listed in the table are arsenic, lead, cadmium, mercury, and hexavalent chromium. When the alumina content is greater than 10.0%, the actual content should be converted into alumina 10.0% products, and the index of each magazine is calculated