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North Bay Resources Announces Refinery Shipment of Gold Concentrate from Bishop Gold Mill, California
North Bay Resources Announces Refinery Shipment of Gold Concentrate from Bishop Gold Mill, California.
About this update from North Bay Resources, Inc.
[{"type":"text","content":"\n BISHOP, Calif., March 04, 2025 (GLOBE NEWSWIRE) -- North Bay Resources, Inc. (the “Company” or “North Bay”) (OTC: NBRI) is pleased to announce a test shipment of 327 lbs. of gold concentrate grading 14.2 ounces per ton has been made from the Bishop Gold Mill to Just Refiners, Reno, NV. The shipment was the result of ongoing optimization of the Mill in February processing ore from its Fran Gold Property. Recent ore runs produced an estimated 2.44 troy ounces of contained gold from approximately 10 tons of ore. This reflects a recovered gold grade of 0.24 ounces per ton. An additional 0.1 ounce of contained gold in low-grade concentrate remained at the Mill. Recovery is currently estimated at approximately 50% overall or 70% of gravity recoverable gold. Metallurgical testing has shown gravity recovery of up to 67% may be achieved with an additional 30% recoverable by flotation. Head grade is estimated at 0.5 ounces per ton but varies considerably at the centrifuge due to gold charging of the ball mill and overflow container due to the inherent density of gold. The gravity circuit is now efficiently processing material and optimization of the jaw crusher, ball mill, centrifuge, and shaker table are now largely complete. The Company is now implementing the flotation circuit and increasing gravity circuit throughput. The Company reports the following Mill optimization progress: Centrifuge grade has been optimized from initial results of 0.5 ounce per ton to 19 ounces per ton, with a weighted average of 13 ounces per ton.Double pass centrifuge grade of 45 ounces per ton has been achieved.Optimization of gravity circuit has been successful with targeted results achieved in grind size and classification involving residence time in the ball mill, water flow, and residence time in the centrifuge. Final optimization of the gravity circuit is expected to increase overall recovery by up to 17%.The flotation circuit is currently being brought on-line to target very fine gold (-200 mesh) and gold in quartz not otherwise recovered by centrifuge or scavenger recovery at the shaker table. Implementation of flotation is expected to increase overall recovery by up to 30%.Scavenger recovery at the Diester Table was increased from initial grade of 0.2 ounce per ton to 5.2 ounces per ton, with a weighted average of 2 ounces ...