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High-purity copper recycled from smelter dust by sulfation roasting, water leaching and electrorefining
Environmental Chemistry Letters ( IF 15.7 ) Pub Date : 2020-07-09 , DOI: 10.1007/s10311-020-01047-0
Jayati Priya , N. S. Randhawa , J. Hait , N. Bordoloi , J. N. Patel

Metal recycling is drawing high interest in the context declining natural resources and the future circular economy. Smelter dust from copper extraction plants contains copper (Cu), which is both an economic loss and a pollution issue. There is therefore a need for techniques to recover Cu from ultrafine dust. Here we tested sulfation roasting, water leaching and electrorefining to recover Cu. We studied this process by thermochemical simulation and thermogravimetry to optimize sulfation roasting parameters such as time, temperature and quantity of sulfuric acid. Results show that copper can be selectively recovered as 99.9% of pure copper. Moreover, we recycled chemicals by-products of the plant in the process. Our findings suggest that this process is upscalable and should decrease the environmental pollution by Cu.



中文翻译:

通过硫酸盐焙烧,水浸和电精炼从冶炼厂粉尘中回收高纯度铜

在自然资源减少和未来循环经济的背景下,金属回收正引起人们的极大兴趣。铜提取厂的冶炼厂粉尘中含有铜(Cu),这既是经济损失,也是污染问题。因此,需要从超细粉尘中回收Cu的技术。在这里,我们测试了硫酸盐焙烧,水浸和电精炼以回收铜。我们通过热化学模拟和热重分析法对该工艺进行了研究,以优化硫酸盐焙烧参数,例如时间,温度和硫酸量。结果表明,铜可以选择性地作为纯铜的99.9%回收。此外,我们在此过程中回收了工厂的化学副产品。我们的发现表明,该过程是可升级的,并应减少铜对环境的污染。

更新日期:2020-07-09
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