Excellent Recoveries of Palladium, Platinum and Rhodium fromDownstream Processing Test Work

Excellent Recoveries of Palladium, Platinum and Rhodium fromDownstream Processing Test Work

Blackstone Minerals Limited is pleased to announce that preliminary hydrometallurgical test work completed by Simulus Engineers on PreFeasibility Study (PFS) Pressure Oxidation (POX) residues has demonstrated excellent recoveries of Platinum Group Elements (PGEs) including palladium, platinum and rhodium using a conventional flowsheet.

Blackstone Minerals Limited (“Blackstone" or the “Company") is pleased to announce that preliminary hydrometallurgical test work completed by Simulus Engineers on PreFeasibility Study (PFS) Pressure Oxidation (POX) residues has demonstrated excellent recoveries of Platinum Group Elements (PGEs) including palladium, platinum and rhodium using a conventional flowsheet (refer Table 1 and Figure 1).


• Concentrate residue samples have been tested and determined to be amenable to chlorination leaching, which adds further value to Blackstone's Downstream Business Unit (DBU).

• The PGE grades quoted below in Table 1 are difficult to recover in a conventional pyrometallurgical process. The Blackstone DBU hydrometallurgical process enables economic PGE recovery from concentrates with PGE concentrations below typical payability limits, due to low losses in the POX process.

• The positive results indicate the potential for the economic recovery of PGEs. Test work is ongoing to further optimise these results, and in parallel, studies are continuing with the aim to incorporate the PGE recovery circuit into the DBU PreFeasibility Study.

Click here for the full press release.

Elizabeth Gold Project Drilling Update

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The 2021 drilling campaign began on June 5 th . Five diamond drill holes have been completed to date for a total of 774 metres. Drill hole EZ-21-04, drilled on the Northern extension zone of the South West vein, has intersected a wide zone of quartz veining (approximately 4.2-metres), from 121.8-126.0 m, with visible gold evident over approximately one metre (see Figure 1). Additional quartz veining with visible gold has been identified in diamond drill hole EZ-21-02.

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Rio Tinto has started operations at a new commercial scale demonstration plant to produce high-quality scandium oxide at its Rio Tinto Fer et Titane (RTFT) metallurgical complex in Sorel-Tracy, Quebec.

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