General requirements for mineral industrial indicators of symbiotic (copper, lead and zinc) in Yanjin Mine

project

Sulphide ore

Oxidized ore

Cu (copper)

Pb (lead)

Zn (zinc)

Cu (copper)

Pb (lead)

Zn (zinc)

Boundary grade (ωB)%

0.2 to 0.3

0.3 to 0.5

0.5 to 1

0.5

0.5 to 1

1.5~2

Minimum industrial grade (ωB)%

0.4 to 0.5

0.7 to 1

1 to 2

0.7

1.5~2

3 to 6

Average grade of the deposit (ωB)%

0.7 to 1

6

6

10~12

10~12

Minimum recoverable thickness m

1 to 2

1 to 2

1 to 2

1

1 to 2

1 to 2

Stone removal thickness m

2 to 4

2 to 4

2 to 4

2

2 to 4

2 to 4