Matthew Spizziri reports that Toro Energy Limited announced today the results of a series of technical R and D studies from their 100% owned Wiluna Uranium Project in Western Australia. The goals of the research studies were to explore opportunities to enhance and optimize the process design, project configuration and operating and capital cost structure for the Wiluna Uranium Project.
Toro completed a 130 sonic drill hole campaign at the Centipede, Millipede, Lake Maitland and Nowthanna deposits, which aimed to help determine why downhole gamma probe measurements for uranium appear to under-estimate the uranium present compared to uranium values from geochemical analysis, particularly at high grades. The analysis will provide new data to interpret gamma probe assays on which the resource is based. Early results have significantly improved understanding of the relationship of uranium grade to mineralogy and the impact this may have on the application of gamma measurement historically to determining the Wiluna resource. Toro anticipates being able to release a new mineral resource estimate based on these results in the fourth quarter 2015.
Program During 2015, Toro has undertaken a multi-staged metallurgical program to assess the applicability of the Upgrade process to ore samples collected from Wiluna. Marenica Energy Limited has developed Upgrade, which is a beneficiation process that has been reported to achieve about 98% rejection of mass and a 50 times concentration of uranium in leach feed on calcrete-hosted uranium ore samples from Namibia. Initial components of the full program have achieved promising results, such as removal of fine particles (slimes) from the feed samples (desliming). This work has demonstrated that desliming the ore results in the rejection of approximately 15% of ore mass with a very low uranium loss to a slime product.
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