Index Name

Specification

Top Class

High Class

Qualified

ZnS ω/%,≥

99.8

99.5

99.0

Fe (mg/kg),≤

0.2

0.6

1

Pb (mg/kg),≤

0.3

1.0

2

Cu (mg/kg),≤

0.2

0.5

1

Ni(mg/kg),≤

0.1

0.3

1

Mn (mg/kg),≤

0.1

0.5

1

Cd (mg/kg),≤

0.1

0.5

1

SO4  ω/%,≤

0.10

0.20

0.30

Loss on drying  ω/%,≤

0.2

Bulk Density (g/cm3)

0.6-0.9

Partice size (D50)(um)

5.0±1.0