Study of Copper Leaching from Mining Waste in Acidic Media, at Ambient Temperature and Atmospheric Pressure

被引:9
|
作者
Maria Terrones-Saeta, Juan [1 ]
Suarez-Macias, Jorge [1 ]
Linares del Rio, Francisco Javier [1 ]
Antonio Corpas-Iglesias, Francisco [1 ]
机构
[1] Univ Jaen, Higher Polytech Sch Linares, Dept Chem Environm & Mat Engn, Sci & Technol Campus Linares, Linares 23700, Spain
关键词
hydrometallurgy; leachate; ICP-MS; polymetallic sulphides; granite; copper; mining waste; waste rock; recovery rate; sustainability; SECONDARY COPPER; HYDROMETALLURGY; EXTRACTION; SCRAP;
D O I
10.3390/min10100873
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
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.
引用
收藏
页码:1 / 23
页数:21
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