Experimental study on the old shandong penglai xin crown tail pillar leaching mi
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Samples from Penglai Xin crown Mining Company Limited, in 2013 at the end of 12 to build the engineering design Co. Ltd. Institute of mining and metallurgy laboratory. Penglai Xin crown Mining Co. Ltd. old tailing samples in some years the backlog of tailings of refractory mineral tailings, the average gold, silver 1.2 x 10-6 trace arsenic, sulfur 0.425%; 0.056% lower. The size distribution is not uniform, the content of -0.076mm (-200) level and above accounted for 65.26%, -0.038mm (-400) level content accounted for 39.23%, of which -0.018mm (-800 mesh) accounted for 29.9%, indicating more mud samples. A fine gold veins and veinlets disseminated distribution in quartz vein fissures or pyrite sericite quartz rocks, long-term accumulation of mud, weathering, serious oxidation. After re-election, flotation, cyanide (leaching and column leaching), beneficiation test research, the cyanide leaching process of gold recovery, the highest recovery rate. The old tailings grinding -200 reached 79.5%, two and two after a roughing finishing process closed-circuit flotation test, get the gold grade of concentrate of 13.20 * 10, the gold recovery rate of 33.54% results.
The old mill tail ore samples by 85.5% -400 mesh, the cyanide leaching, the leaching rate of gold reached 70.83%; laboratory column leaching, the leaching rate of gold reached 60%.
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