developments in the processing of refractory & complex gold ores
developments in the processing of refractory & complex gold ores
developments in the processing of refractory & complex gold ores
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ALBION PROCESS<br />
• Developed by Xstrata, and marketed through Core Resources,<br />
Australia.<br />
• Potentially lower cost option for <strong>gold</strong> locked <strong>in</strong> <strong>refractory</strong><br />
iron/arsenic and base metal sulphide <strong>ores</strong>.<br />
• Consists <strong>of</strong> flotation, ultraf<strong>in</strong>e gr<strong>in</strong>d<strong>in</strong>g <strong>of</strong> concentrate us<strong>in</strong>g<br />
Isamill technology, and agitated oxidative atmospheric leach<strong>in</strong>g<br />
reactors with oxygen sparg<strong>in</strong>g operat<strong>in</strong>g auto<strong>the</strong>rmallly at<br />
93-98C.<br />
• Limestone dos<strong>in</strong>g to ma<strong>in</strong>ta<strong>in</strong> neutral pH <strong>of</strong> 5-7 used for pyrite,<br />
arsenopyrite, and tellurides.<br />
• Followed by thicken<strong>in</strong>g, cool<strong>in</strong>g and <strong>gold</strong> recovery by CIL.<br />
• Two commercial z<strong>in</strong>c plants commissioned <strong>in</strong> Spa<strong>in</strong> <strong>in</strong> 2010 and<br />
Germany <strong>in</strong> 2011.<br />
• First commercial <strong>refractory</strong> <strong>gold</strong> plant <strong>in</strong> Dom<strong>in</strong>ican Republic <strong>in</strong><br />
2012. Second under construction <strong>in</strong> Armenia.<br />
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