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某黄金矿山矿井水悬浮物产生机理及治理技术研究
- 作者：
王秀会|张大勇|许玲|崔东东|赵晓芬
- 作者单位：
- 莱州汇金矿业投资有限公司|长春黄金研究院有限公司|烟台市土地储备和利用中心
基金项目：
- 吉林省科技发展计划项目（YDZJ202502CXJD086）
详细信息：
- 作者简介：
- 王秀会（1973—），男，高级工程师，从事选矿、冶炼、环保等相关工作；E?mail：459466379@qq. com
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Study on the formation mechanism and treatment technology of suspended matter in mine water from a gold mine
- English Author：
Wang Xiuhui¹, Zhang Dayong², Xu Ling³, Cui Dongdong¹, Zhao Xiaofen¹
- Unit：
- （1. Laizhou Huijin Mining Investment Co., Ltd.; 2. Changchun Gold Research Institute Co., Ltd.; 3. Yantai Land Reserve and Utilization Center）
- 摘要
- 在线预览
- 参考文献
摘要:
针对某黄金矿山矿井水悬浮物产生原因及外排水悬浮物超标问题，开展了矿井水悬浮物的产生机理及治理技术研究。在系统分析并验证悬浮物产生机理后，采用磁混凝沉淀法对悬浮物的去除效果进行了试验研究。结果表明：该黄金矿山矿井水中悬浮物产生原因是矿井水从井下抽取到地面后，由还原环境变为氧化环境，Fe2＋被氧气缓慢氧化为 Fe3＋，Fe3＋与 OH-进一步结合生成氢氧化物 Fe（OH）3。单一混凝剂投加试验中，PFS 的混凝效果优于 PAC 和 PAS，PAM（阴）的混凝效果优于PAM（阳）和PAM（非），混凝剂联合投加对悬浮物的去除效果优于单一投加，选用10 mg/LPFS＋2 mg/L PAM（阴）联合投加的方式，悬浮物去除效果最佳，去除率可达到97.06 %。在常规混凝沉淀的基础上，加入磁粉可以极大缩减混凝沉降时间，磁混凝沉淀工艺有望帮助该黄金矿山解决其面临的难题。
关键词:
黄金矿山；矿井水；悬浮物；产生机理；治理技术；混凝剂；磁混凝沉淀
Abstract:
To address the causes of suspended matter in mine water and the issue of suspended matter exceeding discharge standards at a certain gold mine, this study investigated the formation mechanism of suspended matter and evaluated treatment technologies. After systematically analyzing and verifying the suspended matter formation mechanism, experimental studies were condueted on the removal efficieney of suspended matter using the magnetie coagulation-sedimentation method. The results show that the suspended matter in mine water primarily forms due to the transitionfrom a reducing environment underground to an oxidizing environment at the surface, where Fe2+ is gradually oxidized by oxygen into Fe3+, which subsequently reacts with hydroxyl ions to form ferric hydroxide Fe(OH);. In single-coagulant dosing tests, PFS exhibited better coagulation performance than PAC and PAS, and anionic PAM performed better than cationic or nonionic PAM. Combined use of coagulants was more effective than single-agent dosing. The optimal removal efficiency (up to 97.06 %) was achieved with a combined dosage of 10 mg/. PFS + 2 mg/T anionic PAM. The addition of magnetic powder significantly shortened the sedimentation time compared to conventional coagulation-sedimentation, indicating that the magnetic coagulation-sedimentation process is a promising solution to the suspended matter problem in mine water at this gold mine.
Keywords:
gold mine; mine water; suspended matter; formation mechanism; treatment technology; coagulant; magnetic coagulation‑sedimentation
