Hycroft, a 59%-owned subsidiary of Granges Inc. (TSE), produced 24,000 oz during the third quarter of 1989, compared with 19,000 oz in the previous quarter.
Most of the company’s gold output comes from the Crofoot mine, a 15,000-ton-per-day heap leach mine 60 miles west of Winnemucca, Nev. Hycroft also recovered 700 oz gold per month from existing heaps at the Lewis mine in the current quarter.
To improve operating efficiencies, Lewis ore is now mined with large Crofoot mining equipment. The ore is then mingled and processed through the Crofoot plant and stacked on Crofoot heaps via conveyors. As a result, Hycroft is reporting increased costs savings, and increased gold recovery due to a finer crushed product.
The company attributed its improved operating performance to a number of other factors, including the acquisition of key management and supervisory personnel.
Hycroft also noted recent reductions to solution application rates to enhance solution grade. It added that the additional recovery of gold from a low grade leach solution recirculation system had accelerated gold recovery by 2,700 oz per month in the third quarter of 1989.
Direct operating costs per oz of gold produced was reported as $295(US) for the year through August, 1989. The company expects to produce 80,000 oz gold this year, some 8,000 oz less than anticipated. The shortfall was attributed to the shutdown and sale of the Lewis crushing plant four months earlier than planned.
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