Mining activity produces a series of wastes that must be treated to avoid environmental pollution. In addition, some of these mining wastes still contain metallic elements that are interesting for their extraction with new less expensive techniques and that can work with low mineral grades, such as hydrometallurgy. This study evaluates the suitability of Copper recovery in mining wastes, coming from waste dump, with a high percentage of metal oxides and granite. This recovery is carried out through leaching in 0.05, 0.10, 0.15 and 0.20 molar Sulphuric Acid solutions, at ambient temperature and atmospheric pressure. The exposure of the waste to the solution was made for 96 h, taking measurements of the leaching and evaluating the increase in Copper concentration every 24 h. The results reflected a good Copper recovery rate with concentrations up to 1.9 g/L. The best results were obtained for the 0.20 molar Sulphuric Acid solutions, producing a stability in the Copper concentration after 72 h. Other elements in smaller proportion as the Zinc were also recovered. Therefore, a process of recovery of Copper was obtained with a robust, versatile and economic technique in mining residues that currently represent an environmental pollution.

中文翻译：

---

常温常压下酸性介质中采矿废铜的浸出研究

采矿活动会产生一系列废物，必须对其进行处理以避免环境污染。此外，其中一些采矿废料仍含有金属元素，这些金属元素对于用较便宜的新技术进行提取很感兴趣，并且可以与矿物等级较低的矿物一起使用，例如湿法冶金。这项研究评估了来自废料场，金属氧化物和花岗岩百分比高的采矿废料中铜回收的适用性。通过在环境温度和大气压下在0.05、0.10、0.15和0.20摩尔的硫酸溶液中浸出进行回收。将废物暴露于溶液中96小时，测量浸出量并每24小时评估铜浓度的增加。结果反映了良好的铜回收率，其浓度高达1.9 g / L。对于0.20摩尔硫酸溶液，可获得最佳结果，在72小时后，铜的浓度保持稳定。还回收了其他比例较小的锌元素。因此，在目前代表环境污染的残留物的开采中，通过强大，通用和经济的技术获得了铜的回收过程。