The heap immersion site is located in Inio County, California. Department of the original tailings heap leach material a lead zinc flotation plant output. The total amount is 1.53Mt, the -200 target accounts for 90%, and the average silver grade is 43gt. Some tailings are bonded into large blocks, so there is a crushing section in the field to break the large tailings. The use of balantite as a binder is used in an amount of 17.6 kg of ore. Using a Φ3×9m drum granulator, the final water content of the pellet is 15%, the curing time is 24h, and the front-end loader is used for heaping, and the stack height is 4m.
The bottom cushion layer of the yard is made of three layers of clay , and the middle layer is mixed with bentonite , and fine sand is used as a protective layer. The concentration of the sodium cyanide solution was 1 gL, the spray intensity was 24.5 L (h·m 2 ), the average concentration of silver in the leachate was 34 mg L, and the silver powder was exchanged at a flow rate of 568 Lmin to recover silver. After leaching for 25 days and washing for 40 days, the recovery of silver was 73%.
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