低浓度含氰炭浸尾浆处理工艺研究

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英文篇名：Study on the treatment process of the charcoal tailings with low concentration cyanide 作者：郭金溢 英文作者：GUO Jin-yi; 关键词：炭浸尾浆 ; 酸化溢流液 ; 总氰 ; 游离氰根 英文关键词：charcoal tailings;;acidified overflow liquid;;total cyanide;;free cyanide 中文刊名：YSYL 英文刊名：China Nonferrous Metallurgy 机构：低品位难处理黄金资源综合利用国家重点实验室;厦门紫金矿冶技术有限公司; 出版日期：2019-04-28 出版单位：中国有色冶金 年：2019 期：v.48 语种：中文; 页：YSYL201902021 页数：4 CN：02 ISSN：11-5066/TF 分类号：80-83

摘要

某矿山采用碱性氯化法对氰化尾浆进行处理,该法漂白粉耗量大且氰化物去除不稳定。本文根据该矿山的现场工艺,采用加压氧化车间产生的酸化溢流液对该矿山氰化尾浆进行预处理,并优化了初始pH、反应时间、药剂用量等参数条件。在酸化溢流液预处理pH=9,不额外补加铜离子,W(Na_2SO_3):W(CN_T)=8:1,反应时间60 min条件下,总氰和游离氰根的去除效果最好,总氰去除率为99.74%,游离氰根去除率为99.85%,处理后的废水含总氰0.28 mg/L,含游离氰根0. 14 mg/L,符合《黄金行业氰渣污染控制技术规范(HJ 943—2018)》要求,并且消耗了酸化溢流液,降低了酸化溢流液中和石灰成本,取得了良好的处理效果和经济效益。
        A mine used alkaline chlorination to treat cyanide tailings. The method had large consumption of bleaching powder and unstable cyanide removal. According to the on-site process of the mine, the cyanide tailings of the mine were pretreated by the acidified overflow liquid proudced by the pressure oxidation workshop, and the parameters such as initial pH, reaction time, and dosage of the agent were optimized. Under the certain conditions, such as acidified overflow liquid pretreatment pH =9,no additional copper ions,W(Na_2SO_3): W(CN_T) = 8: I,reaction time 60 min, the removal of total cyanide and free cyanide was best. The total cyanide removal rate was 99. 74%,and the free cyanide removal rate was 99. 85%. The treated wastewater contained 0. 28 mg/L of total cyanide and0. 14 mg/L of free cyanide. The results were in line with the requirements of the Technical Specification for Cyanide Slag Pollution Control in the Gold Industry(HJ 943—2018). The treatment process consumed the acidified overflow liquid, reduced the cost of the acidified overflow liquid and the lime, and achieved good treatment effect and economic benefit.

引文

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