黄金冶炼厂废水除硬工程设计及运行实践  

Engineering Design and Operation Practice of Softening and Removing Hardness From Wastewater in Gold Smelting Plants

作　　者：顾超超 薛凯元 韩振波 朱自瀚 王蕊 郑晓宇 杨涛 李瑞 Gu Chaochao;Xue Kaiyuan;Han Zhenbo;Zhu Zihan;Wang Rui;Zheng Xiaoyu;Yang Tao;Li Rui(China Shipbuilding NDRI Engineering Co.,Ltd,Shanghai 200090,China)

机构地区：[1]中船第九设计研究院工程有限公司,上海200090

出　　处：《绿色科技》2024年第22期197-200,共4页Journal of Green Science and Technology

摘　　要：湿法冶炼黄金会产生大量的含氰废水,经过破氰处理后的废水仍具有硬度及重金属含量高的特点,无法直接回用生产。黄金冶炼废水高效除硬成为急需解决的技术难题。针对某黄金企业生产需求,废水处理站采用“双碱法+混凝沉淀”工艺,对该厂破氰后的黄金冶炼废水进行软化除硬,工程设计水量为15 m^(3)/h。稳定运行结果表明,该工艺软化除硬效果显著,硬度进水均值为1399.1 mg/L,出水均值为210.9 mg/L,硬度去除率稳定在80%~93%。最终出水指标均满足设计要求,直接运行成本为4.18元/m^(3)。为维护更换方便,管道采用法兰式连接。本工程整体处理效果稳定,成本较低,可为黄金冶炼废水高效软化除硬提供技术支持和参考。Wet smelting of gold will generate a large amount of cyanide containing wastewater,which still has high hardness and heavy metal content after cyanide breaking treatment.The wastewater cannot be precisely reused for production.The technological challenge of removing the hardness from gold smelting wastewater is now an urgent matter to address.In response to the production demand of a gold enterprise,the sewage treatment plant adopted the"NaOH-Na_(2 CO_(3))softening and thickener sedimentation"process to soften and remove hardness from the gold smelting wastewater after cyanide breaking,and the design water intake of this project was 15 m^(3)/h.It was found that the softening and hardness removal effect of the process was remarkable during the stable operation,with an average value of 1399.1 mg/L for hardness influent,210.9 mg/L for average effluent,and the hardness removal rate was stable at 80%~93%.All the final effluent indicators of the treatment plant met the desgin requirements,and the treatment cost was 4.18 yuan/m^(3).In order to facilitate maintenance and replacement by staff,the pipeline was connected by flange.The overall operation effect of this project remained steady,with lower operating expenses,which could provide technological support and guidance for the efficient removal of hardness and softening of gold smelting wastewater.

关 键 词：黄金 含氰废水 硬度 软化除硬 混凝沉淀 

分 类 号：X53[环境科学与工程—环境工程]