FAQ: recovering very fine gold from alluvial mining concentrate

QUESTION

G’day Ian, thank you for the past e-mails on this subject. Please provide the testwork details you did compile from your testing at your mine.

ANSWER

My results from my Cargo gold mine are anecdotal, over 10 years and I have not written them up, sorry. I have performed hundreds of tests for other people as well.

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QUESTION

I am particularly interested in the very fine size ranges, [0-5 to 100 micrometres], for the recovery of this gold, contained in an alluvial mining concentrate.

ANSWER

The mine is an under ground hard rock mine where I use an M8 WT. But I also have an alluvial mine, in which I use another M8 WT.

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QUESTION

You may ask why do I not consider a leaching method for this material? It is primarily due to not wishing to increase the capital cost of the Project, & due to the mode of operation, a fixed plant / transportation of the primary feed materials will render the Project to be uneconomic

ANSWER

Yes….I understand this. I use WTs for the same reason.

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QUESTION

We have revised our table size requirements from the 8 US Ton size to the 1.0 UST. This 1.0 UST size will handle about 650 Kg. of feed / hour, but if closely sized feed ie. minus 1.0 mm., will it handle, [without decreasing gold recovery ], up to 1.0 Metric Tonnes / hour ??

ANSWER

I am a conservative guy…..and err on the side of suggesting that you should count more on 650kgs per hour.

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QUESTION

Ian, we may seem pedantic about the details we are requesting from you & Action Mining Services for the choice of your WT, but we anticipate a thrifty operation, to survive the wide fluctuations in the market gold price as is being experienced particularly now, with a high degree of uncertainty of where the bottom price may be in this current cycle.

ANSWER

I perfectly understand. I am “in the same boat”. Best to send me a sample over to run over my M8. Only a few kgs to 19 kgs is ok to get a reasonable idea. If you can wash a ‘tail’ of gold in a gold pan/dish using your material, then the M8 should work well.

Does your cons/heavies contain any Magnetics? The M8 will work better with any Mags removed.

Please note that nothing beats good ‘classification’…..good close screening, that is. If your gold is fine, then ensure that you screen as much, ‘non gold’ over size off, as you can achieve. This helps separate/concentrate your gold on an M8!

Hope this helps,

Regards,

Ian

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Above is Ian’s answer to a question he received about the gold wave table. For his answers to other Frequently Asked Questions, please enter the word FAQ into the Search box at the top right. More FAQs are coming…