磁化浸金溶液提高某低品位金矿石滴淋堆浸效果研究  

Study on Improving the Effect of Drip and Heap Leaching of a Low-grade Gold Mines with Magnetized Gold Leaching Solution

作　　者：代豪 萨伍提·阿卜杜热伊木 孙春宝[1] 寇珏[1] 胡阳 邢成军 李冠华 白杨 DAI Hao;SAWUTI Abudureyimu;SUN Chunbao;KOU Jue;HU Yang;XING Chengjun;LI Guanhua;BAI Yang(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;Inner Mongolia Taiping Mining Co.,Ltd.,Bayannaoer 014010,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]内蒙古太平矿业有限公司,内蒙古巴彦淖尔014010

出　　处：《金属矿山》2022年第3期105-110,共6页Metal Mine

基　　金：国家自然科学基金项目(编号:51974016)。

摘　　要：某低品位金矿金品位为0.65 g/t,滴淋堆浸浸出率较低。为考察磁化处理对该金矿石滴淋堆浸效果的影响,进行了磁化处理条件试验,考察了Ca^(2+)、Mg^(2+)及Na^(+)等杂质离子浓度对溶液磁化前后表面张力的影响,探究了磁化浸金溶液对低品位金矿滴淋堆浸效果的影响及机理。结果表明:①磁化可以降低去离子水的表面张力,磁感应强度为1 T时适宜的磁化条件为磁化时间15 min、水流速度300 r/min,该条件下磁化后去离子水的磁化效果仅维持50 min。②溶液中Ca^(2+)、Mg^(2+)会使溶液的表面张力不同程度的增大,且表面张力随离子浓度的增大而增大,而磁化可以在一定程度上减弱或消除这类离子的影响;尽管Na^(+)的存在也会降低溶液的表面张力,但溶液表面张力受Na^(+)浓度的影响较小。③磁化后的氰化钠浸金液与矿石的接触角更小,磁化有利于氰化钠浸金液在矿石表面的铺展。④浸金液的磁化处理有利于提高矿石的金浸出率,金浸出率由58.04%提高至62.21%,增幅达4.17个百分点。The gold grade of a low grade gold mine is 0.65 g/t,and the leaching rate of drip heap is low.In order to investigate the effect of magnetization treatment on the drip heap leaching effect of the gold ore,the magnetization treatment condition test was carried out to investigate the effect of Ca^(2+),Mg^(2+)and Na^(+)concentration on the surface tension before and after the solution magnetization,and explore the effect and mechanism of magnetization solution on the drip heap leaching effect of low-grade gold ore.The results showed that:①Magnetization can reduce the surface tension of deionized water.When the magnetic induction intensity is 1 T,the suitable magnetization conditions are magnetization time of 15 min and water flow speed of 300 r/min.Under these conditions,the magnetization effect of deionized water can only be maintained for 50 min.②Ca^(2+)and Mg^(2+)in solution can increase the surface tension of solution to varying degrees,and the surface tension increases with the increase of ion concentration.Magnetization can reduce or eliminate the influence of such ions to a certain extent.Although the presence of Na^(+)also reduced the surface tension of the solution,the surface tension of the solution was less affected by the concentration of Na^(+).③After magnetization,the contact angle between the sodium cyanide leaching solution and the ore is smaller,and the magnetization is conducive to the spread of the sodium cyanide leaching solution on the surface of the ore.④Magnetization treatment of gold leaching solution is beneficial to improve the gold leaching rate of ore,and the gold leaching rate increases from 58.04%to 62.21%,with an increase of 4.17 percentage points.

关 键 词：低品位金矿 磁化处理 表面张力 离子浓度 滴淋浸出 浸出率 

分 类 号：TD953[矿业工程—选矿]