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投稿时间:2021-09-15 修订日期:2021-09-24
投稿时间:2021-09-15 修订日期:2021-09-24
中文摘要: 针对金矿堆浸过程中内部存在的氧亏现象,影响了金的浸出率和浸出效率,本论文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。本研究所制备的体积为1 L的臭氧冰中臭氧浓度最高达897.6 mg/L,臭氧在冰中的留存率约为90%。采用柱浸试验装置对50 kg金矿进行的滴淋堆浸试验结果表明,在氰化钠浓度为300 ppm、滴淋强度为6 L/(m2.h)的条件下,通过预埋臭氧浓度为600 mg/L的臭氧冰,在21天浸出周期内金的浸出率为55.08%,比空白对照组可提高10.48个百分点。
Abstract:One problem facing the gold heap leaching process is the oxygen deficit reducing the leaching rate and efficiency. In this research, 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-day leaching period where sodium cyanide with the concentration of 300ppm was added at the rate of 6 L/(m2·h).The gold leaching rate was 55.08%, which was 10.48% higher than that of the blank control group.
文章编号: 中图分类号: 文献标志码:
基金项目:金在聚合氰胺低毒浸取体系中的溶解机制与调控(编号:51974016)
引用文本:
刘鹏,寇珏,刘子源,杨斌,邢成军,李冠华,白杨,孙春宝.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研究[J].有色金属(选矿部分),2022(6):155-162.
LiuPeng,KouJue,LiuZiyuan,YangBin,XingChengjun,LiGuanhua,BaiYang,SunChunbao.Study on the enhancement effect of ozone ice as oxygen release agent on heap leaching of gold ore[J].Nonferrous Metals(Mineral Processing Section),2022(6):155-162.
刘鹏,寇珏,刘子源,杨斌,邢成军,李冠华,白杨,孙春宝.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研究[J].有色金属(选矿部分),2022(6):155-162.
LiuPeng,KouJue,LiuZiyuan,YangBin,XingChengjun,LiGuanhua,BaiYang,SunChunbao.Study on the enhancement effect of ozone ice as oxygen release agent on heap leaching of gold ore[J].Nonferrous Metals(Mineral Processing Section),2022(6):155-162.