摘要
针对某黄金矿山在长期堆浸生产过程中存在钙、镁等贱金属阳离子积累而影响生产效率和质量的问题,提出了贫液二氧化碳初步除钙与贵液阻垢剂深度除钙联合技术方案。通过试验确定了最佳工艺参数:贫液pH值调整至11.5~12.0,二氧化碳充气压力控制在0.25 MPa,反应时间设定为1.5 h,贫液二氧化碳初步除钙效率可稳定达到90%以上;向贵液中添加优选的DN3阻垢剂,在添加量900 mg/L条件下,载金炭钙吸附量减少了1.76百分点,金吸附率提高了13.38百分点,酸洗再生成本显著降低。连续试验结果表明,采用该联合技术可降低钙、镁离子的影响,提高金的吸附效果,对改善生产工艺具有重要意义。
In response to the accumulation of base metal cations such as calcium and magnesium during long‑term heap leaching operations at a gold mine,which negatively affects production efficiency and quality,a combined technical scheme was proposed involving preliminary calcium removal from barren solution using carbon dioxide and deep calcium removal from pregnant solution using a scale inhibitor.Experimental results determined the optimal process parameters:adjusting the pH of the barren solution to 11.5-12.0,maintaining the carbon dioxide injection pressure at 0.25 MPa,and setting the reaction time to 1.5 h.Under these conditions,the preliminary calcium removal efficiency from the barren solution can stably exceed 90%.By adding the optimized DN3 scale inhibitor to the pregnant solution at a dosage of 900 mg/L,the calcium adsorption on gold‑loaded carbon was reduced by 1.76 percentage points,while the gold adsorption rate increased by 13.38 percentage points,and the cost of acid washing regeneration was significantly reduced.Continuous testing demonstrated that this combined technique effectively reduces the impact of calcium and magnesium ions,enhances gold adsorption,and plays a significant role in improving the production process.
作者
白杨
Bai Yang(Inner Mongolia Pacific Mining Co.,Ltd.)
出处
《黄金》
2025年第6期42-45,51,共5页
Gold
基金
国家重点研发计划项目(2023YFC2907803)。
关键词
堆浸循环液
二氧化碳除钙
阻垢剂
吸附增强
黄金选冶
活性炭
heap leaching circulating solution
calcium removal by carbon dioxide
scale inhibitor
adsorption enhancement
gold metallurgy
activated carbon
作者简介
白杨(1992-),男,工程师,从事黄金选矿及科研管理工作,E‑mail:byang@chinagoldintl.com。
