在盐酸介质中用盐溶解铜缩物:第二部分 - - 对化物度和空气系统的影响
César I Castellón1, María E Taboada2
1Departamento de Ingeniería en Minas, Facultad de Ingeniería, Universidad de Antofagasta, Av. Angamos 601, Antofagasta 1240000, Chile.
Materials (Basel, Switzerland)
|September 9, 2023
概括
这项研究引入了一种新的铜提取方法,用于使用化海水和硫酸提取. 一个空气系统被证明是最有效的,在没有高压或高温的情况下实现70%的铜回收.
科学领域:
- 金与材料科学 金与材料科学
- 水电金术是指用水电金术进行金术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 矿石 (CuFeS2) 是一种主要的铜矿石,但由于其复杂的结构,其出具有挑战性.
- 传统方法通常需要恶劣的条件 (高温,高压) 或产生大量的环境废物.
- 开发高效和环保的浸工艺对于可持续的铜生产至关重要.
研究的目的:
- 评估一种新的铜提取工艺,用于使用化溶液和硫酸在海水中的化缩物.
- 为了研究离子度,硫酸度和通风对铜漏效率的影响.
- 确定最大限度地回收铜的最佳条件,同时最大限度地减少负面副作用.
主要方法:
- 在不同的条件下,在石墨烯酸盐缩物上进行了漏实验.
- 关键变量包括离子度,硫酸度和通过通风提供氧气.
- 使用X射线衍射 (XRD) 和扫描电子显微镜与能量分散光谱 (SEM-EDS) 来分析矿物学变化和表面形态.
主要成果:
- 离子的添加通常增强了甲的浸出,铜的回收在96小时后达到70%.
- 过多的离子 (>0.5M) 导致铜化物 (CuCl) 的形成,减少了铜的回收.
- 一个空气化系统显著增加了表面粗度和氧化还原潜力,有助于有效的铜回收.
- 在硫酸和海水介质中较低的化物剂量下观察到元素硫 (S) 的形成.
结论:
- 这种使用化海水和硫酸的新工艺,为从石灰矿中提取铜提供了一条可行的途径.
- 气化被认为是提高石墨烯酸盐漏效率的最关键因素.
- 需要仔细控制化物离子度,以防止像CuCl.Cl这样的抑制副产品的形成.
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