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Akobo Minerals receives Segele metallurgical testwork results

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Global Mining Review,

Akobo Minerals has received the testwork results from the Peacocke and Simpson Laboratory. The positive results of these gold extraction tests give potential for greater than expected revenue generation to that proposed in the scoping study, at similar operating costs.

The metallurgical testwork gives an indication of how much gold is expected to be recovered as if the cores/bulk samples had been treated with conventional gravity recovery and cyanide leaching unit operations. Samples were taken from a total of three holes drilled at Segele to generate 248 kg for testwork purposes.

  • Better than expected gold recovery of up to 97.2% achieved, as compared to 90% assumed in the Segele scoping study – directly improving expected future revenue.
  • The testwork confirms that good recovery is possible from a very simple processing operations.
  • The grade of the bulk sample was found to be 31.01 g/t, significantly higher than the 20.9 g/t average grade for the Segele mineral resource estimate.

The testwork shows a good gravity gold recovery of 76% with an additional recovery of up to 21.3% with cyanide leaching of the gravity tailings. Also, grindability results indicated a slightly softer ore than expected, with the possibility to install a smaller mill than assumed in the scoping study. These results can be considered to be unoptimised and hence improvements are still possible.

Now that the first stage of metallurgical testwork is complete, Akobo Minerals will advance to plant design. For that purpose Peacocke and Simpson has a strong partnership with Appropriate Process Technologies (Johannesburg, South Africa). APT have provided over 200 small and medium scale plants to over 23 countries since 2007.

Akobo Minerals intends to investigate alternatives for building and operating its Segele mine – especially for underground mining activities. For example, in order to reduce the risk of delayed production start and other operational risks, it is realistic to look at using contract mining. Outsourcing such activities is possible given the excellent project economics and will allow the company to focus on processing plant operation and reaching the company objectives of defining 1.5 – 2 million oz.

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African mining news Gold mining news