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Pilot Test and Research of Desalination in Recycle Water in Copper Smelting Workshop

Authors： LIU Yongfeng，JIANG Guoming，ZHU Zanqiang，YAN Xianlin，GUI Junfeng，LIU Ruili

Units： 1. Science Environmental Protection Co.，Ltd，Changsha 410000，China； 2. Hu’nan Engineering Laboratory of Nonferrous Heavy Metal Pollution Control Equipment, Changsha 410000，China;3. Research Center of Pollution Treatment and Equipment Engineering Technology for Non-ferrous Industry, Changsha 41000, China

KeyWords： copper smelter; recycle water; salt separation with NF; high salt concentration rate

ClassificationCode：TQ028；X703.1

year,volume(issue):pagination： 2024,44(2):157-164

Abstract：

In order to realize Near Zero Emission and resource utilization in wastewater treatment, Pretreatment+Reverse Osmosis+Nanofiltration+Electrodialysis+Evaporative Crystallization are adopted to treat the recycled water in a copper smelting workshop. The experimental result shows that the retention rate of SO42- reaches > 99%, the TDS of Na2SO4 in concentrated water reaches 179g/L, and the TDS of NaCl in concentrated water canr reach 150g/L. After concentration and separation, Na2SO4 and NaCl salt product are precipitated, and Na2SO4 meets the requirements of Class II qualified product defined in GB/T 6009-2014 Industrial Anhydrous Sodium Sulfate, and NaCl meets the Class I standard defined in GB/T5462-2015 Industrial Salt Quality Standard. This process solves the problem of low concentration in recycled concentrated water and removes the impurities in Na2SO4 products, providing bases for the cost-effective engineering treatment of high salty wastewater in the non-ferrous industry.

Funds：

湖南省环保科研课题（HBKT-2022013）资助

AuthorIntro：

刘永丰（1985-），男，湖南娄底人，高级工程师，主要从事冶炼废水资源化了零排放处理研究。

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