Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering 2017-04-04T06:57:51+00:00
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Data reconcilation between process plant and Geologist (5 replies and 2 comments)

4 months ago
Mulu 4 months ago

I have a problem of data reconciliation between process plant feed head grade and blend head grade provided by the grade control geologist. Has big difference.


Paul Morrow
4 months ago
Paul Morrow 4 months ago

Mulu, you are being very generic.  Give us some details on your situation. Plant size, process, metals, current sample points/methods.

4 months ago

Thanks Paul
Gold Process Plant, Cyanide Leaching process 2000 tons per day ,sample points Ball mill feed from conveyor belt, and CIL tail .

Bob Mathias
4 months ago
Bob Mathias 4 months ago

How do you track/account for the gold produced? Do you sell the loaded carbon of strip to bullion? How often do you sample?  

Be sure to give us a little detail as possible here...

4 months ago
David 4 months ago

Mulu, read this on Gold Mill Sampling and Metallurgical Balance

+ Gold extraction is calculated by dividing the ounces of Au extracted (equation shown above) by the total ounces of Au going into the plant [(Head assay x Dry ore tonnage) + (Reclaim solution assay x Reclaim solution tonnage)].

This is the only balance made on a daily basis. Weekly or semimonthly balances are not performed.

The monthly balance is an accounting of gold produced that month, and includes a gold inventory throughout the plant. This inventory includes the gold content in the grinding circuit, thickening, leach and CIP tanks, adsorption columns, any loaded carbon, and the refinery.

and a PDF here for you.

Bob's question on your final gold refers to

Mulu, the more details you give the better we can help you.

4 months ago

Mass flow measurement is only at ball mill feed .We have daily, weekly and monthly basis balance accounting of gold produced. Monthly report includes closing gold in circuit and reconciled feed head grade.

4 months ago
Mulu 4 months ago

Thanks Bob and David

Please Find the attached file. I have indicated all the sample points, all sampling is manual and is taken in one hour interval.


4 months ago
David 4 months ago

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