The independent tests on samples from the 2.2-million-ounce project demonstrate highly favourable characteristics for low‐cost processing.
These include gold recoveries at coarse grind sizes ranging from 96% (180 µm) to 98% (106 µm) for fresh ore and optimum grind sizes of between 106 and 150 µm.
This demonstrates the potential use of a simple-stage crusher with SAG mill circuit.
Managing director Caigen Wang said: “These are further great results from our metallurgical test program with excellent gold recoveries obtained across a range of coarse grind sizes for fresh ore.
“In a nutshell, coarser grind sizes translate into reduced energy use and greater throughput compared to other operations that have to grind down to 75 µm.
“Gold mineralisation at AG looks to be very amenable to relatively simple crushing and grinding using a simple comminution flowsheet with single-stage crushing followed by SAG milling and lower power consumption.”
The test work program is now moving to cyanide leach optimisation work with expected completion in late June.
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Wang continued: “These metrics are very compelling, and I look forward to providing further results from our test-work program being managed by Mintrex in Perth, which is moving into final optimisation stages.
“Drilling continues at Abujar and we remain on schedule for delivery of an updated resource in Q3 2020.
“This updated mineral resource and results from the metallurgical test-work program will underpin a PFS scheduled for delivery Read More – Source