![Equipment Specification for Zimbabwe version 3](/e69yszg/126.jpg)
Equipment Specification for Zimbabwe version 3
Using stamp mills, hard rocks take 5 hours/tonne to be ground and concentrated, whereas soft ores take hours/tonne. Miners prefer milling centers with stamp mills, as they believe that ball mills retain part of the gold in the internal liners. The lack of gold liberation is an evident problem when using stamp mills .