A Refractory Mineral: Kalgoorlie

Mineralization Characteristics
The gold is a very finely included part in the pyrite which is abundant, on the side of other sulphurs (tetraedite, mispiquel) exist equally free gold and the telures; the gangue is a calcareous schist.

Content: 6 g/ton.

Treatment Capacity: 1,360 TM/day

Treatment Characteristics
After the shredding, the mineral is ground in a first stage in a bar grinder; the discharge was submitted to a gravimeric concentration over a table, allowing the separation of a first concentrate; the mineral is immediately re-ground in a chain grinder, and after re-floated.

Steriles and concentrates are, each one, cyanurized separately: the first, will simply be lixiviated in shaken tubs; the second ones, are lixiviated in two times the at first, such is the case that the second, after a burning destined to become cyanurable the gold included in the pyrite, it will eliminate the arsenic, the gold is precipitated on top of zinc dust, it is refined by fusion.