Luiri Gold’s (ASX: LGM) in-house testwork has produced positive results demonstrating the potential for high gold recoveries from the Dunrobin project in Zambia.
Importantly, preliminary geo-metallurgical interpretation of the Dunrobin resource supports the 90% average gold recovery used in the recent Feasibility Study.
It also enhances Luiri’s understanding of the metallurgical treatment characteristics of the resource.
For the body of results, the average gold recovery potential was about 100%.
Simple statistical analysis of the results showed that for samples with recovery potential above 95%, there was little correlation between gold recovery potential and any of the other analytical results.
For samples with recovery potential below 95% there was weak correlation between poor gold recovery potential and increasing levels of sulphur, arsenic, silver and copper.
Ore with poor treatment characteristics is restricted to a few discrete portions of the resource.
The overall conclusion from these observations was that the ore is free milling, even though it does contain significant levels of cyanide soluble copper.
The data on the ore treatment characteristics will be used in future mine planning and scheduling exercises and it will also allow improved predictions of gold recovery and reagent consumption in the processing plant.
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