Grinding & Classification Circuits

Grinding & Classification Circuits

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Fractured Garnet & Magnetite seperation from flat placer gold (1 reply)

M
akfury
4 years ago
akfury 4 years ago

Running this dirt in any gravity separation I've tried induces packing/plugging and gold loss. All kinds of sluice setups & centrifuge. Centrifuge struggles and is too little production. Looking at Hydrocyclone for results? Problem areas are mainly 30- to 40+ mesh. Also have high % quartz at times.

J
Jorge
2 years ago
Jorge 2 years ago

It is important to perform a testing program based on information from a mineralogical study. Probably, it would be necessary to consider two concentration stages to get an acceptable concentrate grade. Magnetite is an iron oxide whose specific gravity ranges from 5.0 to 5.1, and is sufficiently heavy to permit of its concentration from gangue by a Spiral Concentrator. Part of the garnet would be reported in the gravity concentrate. Therefore, it is necessary to clean the concentrate by using a magnetic separator. The tailings from the latter process will contain mainly garnet and other gangue minerals. Tests will indicate the proportion of gold reported in the spiral concentrate and tailings to determine if the tailings must be retreated by gravity. 

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