臭氧冰氧缓释剂的制备及其对某金矿滴淋堆浸的强化效果  

Enhancement Effect of Ozone Ice as Oxygen Release Agent on Heap Leaching of a Gold Ore

作　　者：刘鹏 寇珏[1] 刘子源 杨斌 邢成军 李冠华 白杨 孙春宝[1] LIU Peng;KOU Jue;LIU Ziyuan;YANG Bin;XING Chengjun;LI Guanhua;BAI Yang;SUN Chunbao(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Inner Mongolia Pacific Mining Co.,Ltd.,Inner Mongolia,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010500

出　　处：《有色金属（选矿部分）》2022年第6期165-172,共8页Nonferrous Metals（Mineral Processing Section）

基　　金：国家自然科学基金资助项目(51974016)。

摘　　要：针对金矿堆浸过程中内部存在的氧亏现象导致金的浸出率和浸出效率低的问题,利用臭氧水制冰作为氧缓释剂预埋于矿石中,通过臭氧的缓慢释放与分解补充浸出液中的溶解氧,从而提高金的浸出效果。研究制备体积为1L的臭氧冰中臭氧浓度最高达897.6mg/L,臭氧在冰中的留存率约为90%,采用柱浸试验装置对50kg金矿进行的滴淋堆浸试验。结果表明,在氰化钠浓度为300mg/L、滴淋强度为6L/(m^(2)·h)的条件下,通过预埋臭氧浓度为600mg/L的臭氧冰,在21d浸出周期内金的浸出率为55.08%,比空白对照组提高10.48个百分点。One problem facing the gold heap leaching process was the oxygen deficit reducing the leaching rate and efficiency.Ozone ice was prepared and embedded in the gold ore heap where additional oxygen was gradually supplied during the leaching process as the ice melted and ozone was decomposed.As a result,the generated oxygen would participate in the leaching and improve the gold leaching performance.The maximum ozone concentration of the 1 L ozone ice was obtained at 897.6 mg/L and the retention rate of ozone was about 90%.A column leaching device was designed and used for batch leaching tests on 50 kg gold ore samples of each batch.Ozone ice with ozone concentration of 600 mg/L were embedded regularly during a 21-days leaching period where sodium cyanide with the concentration of 300 mg/L was added at the rate of 6 L/(m^(2)·h).The gold leaching rate was 55.08%,which was 10.48 percentage points higher than that of the blank control group.

关 键 词：臭氧冰 氧缓释剂 氰化浸出 堆浸 

分 类 号：TD953[矿业工程—选矿]