Abstract

Here we report on a single-step, eco-friendly, and facile approach to combustion-assisted reprocessing of oily copper waste into copper powder without preliminary cleaning. Complete reduction of copper from oily copper waste in the combustion wave was reached in the presence of ammonium nitrate and without introducing any reducing agent. The optimal conditions for obtaining >99 % copper powder were reached for green [Cu₂O + m(oil)] + xNt mixtures with m = 7–11 wt % and x = 0.35–0.55, were m stands in wt % and x in mole fractions, both in relation to 1 g-mol of Cu₂O. In scale-up experiments (up to 10 kg of green mixture), the copper powder with oxygen content below 0.5 wt % and free carbon content below 0.25 wt % was successfully produced. Our approach was also successfully applied to combustion-assisted reduction of copper oxide oily waste mixed with nickel oxide to yield composite powders and Cu–Ni alloys.

中文翻译：

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SHS将氧化铜废物加工成铜粉

摘要

在此，我们报告了一种无需燃烧即可将含油铜废料燃烧助剂处理为铜粉的单步，环保且简便的方法。在硝酸铵存在下且不引入任何还原剂的情况下，燃烧波中的油性铜废料中的铜完全还原。对于绿色[Cu ₂ O + m（油）] + x Nt混合物，达到m > 7-11 wt％和x = 0.35-0.55的最佳条件是获得大于99％铜粉的条件，m为wt％，x以摩尔分数计，均与1 g-mol Cu _2有关O.在按比例放大的实验中（最多10千克绿色混合物），成功生产了氧含量低于0.5 wt％，游离碳含量低于0.25 wt％的铜粉。我们的方法还成功地应用于燃烧辅助还原氧化铜与氧化镍混合的油性废料，以生产复合粉末和Cu-Ni合金。