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生物氧化在内蒙某低品位原生金矿浸出研究中的应用
引用本文:简勇章. 生物氧化在内蒙某低品位原生金矿浸出研究中的应用[J]. 矿产综合利用, 2022, 43(3): 143-147. DOI: 10.3969/j.issn.1000-6532.2022.03.025
作者姓名:简勇章
作者单位:内蒙古金中矿业有限公司,内蒙古 锡林郭勒盟 011300
摘    要:对内蒙某低品位原生金矿进行了生物氧化浸出实验研究,考查了配入硫磺以及硫精矿对降低酸耗,以及金浸出率的影响。结果表明,当磨矿细度-74 μm 80%,酸浸1 h,矿石酸耗为31 kg/t;全泥浸出24 h,金浸出率为51%~55%;生物搅拌浸出,氧化6 d,硫氧化率为80%,金的浸出率提高到91.4%;生物柱浸,矿石粒度 12 mm 80%,生物氧化170 d-转型-氰化浸出180 d较直接氰化浸出360 d,金浸出率提高3.72%~23.54%;柱内配入硫磺及硫精矿不利于金的氰化浸出;柱外生物氧化硫磺可以减少硫酸酸耗15.7 kg/t。

关 键 词:低品位原生金矿   硫磺   硫精矿   生物氧化   硫酸耗量   浸出率
收稿时间:2021-06-21

Application of Bio-Oxidation in Leaching of a Low-Grade Primary Gold Ore in Inner Mongolia
Jian Yongzhang. Application of Bio-Oxidation in Leaching of a Low-Grade Primary Gold Ore in Inner Mongolia[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(3): 143-147. DOI: 10.3969/j.issn.1000-6532.2022.03.025
Authors:Jian Yongzhang
Affiliation:Inner Mongolia Jinzhong Mining Co., Ltd., Xilin Gol League, Inner Mongolia, China
Abstract:Bio-oxidation leaching test was conducted on a low-grade primary gold mine in Inner Mongolia. The acid consumption of ore, cyanidation, bio-oxidation stirred leaching, column leaching, add sulfur and sulfur concentrate to reduce acid consumption , and impact on gold leaching efficiencies were investigated. The results showed that with grinding fineness at -74 μm 80%, acid leaching for 1h, consumption of sulfur acid at 31 kg/t; After cyanidation for 24 h, the gold leaching efficiencies were 51%~55% ; After Bio-oxidation stirring leaching for 6 d, the sulfur oxidation efficiencies was reaching 80%, and the gold leaching efficiencies was reaching 91.4%; Bio-oxidation column leaching tests on gold ore of particle size at -2 mm 80% for 350 d(oxidation 170 d and cyanide leaching 180 d), the gold leaching efficiencies was increased by 3.72%~23.54% than the direct cyanide leaching 360 d; The addition of sulfur and sulfur concentrate was not conducive to gold cyanide leaching, and the bio-oxidation of sulfur outside the column could reduce the consumption of sulfuric acid by 15.7 kg/t. 
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