Geological exploration industrial indicators of Chaerhan Salt Lake type potassium-magnesium deposit in Qinghai

Types of

Boundary grade KCl (%)

Minimum industrial grade KCl (%)

Ore grade KCl (%)

Minimum recoverable thickness (m)

Stone removal thickness (m)

Liquid brine potassium mine

0.5 (decreased to 0.3)

1 (has been reduced to 0.5)

Class a≥1

Class b ≥ 0.5 ~ 1

Class c <0.5

Solid potassium mine

2

6

Rich mine ≥12

Lean mine 6~12

Rich mine 0.2

Lean mine 0.3

0.5