2019 5th International Conference on Energy Materials and Environment Engineering | |
Color of Oxidative Pressure Leaching Liquor: A Case of Sphalerite | |
能源学;生态环境科学 | |
Guo, Yaqin^1^2 ; Liang, Duoqiang^3 ; Deng, Yong^4 | |
School of Mining and Environmental Engineering, Chongqing Vocational Institute of Engineering China, Chongqing | |
402260, China^1 | |
College of Materials Science and Engineering, Chongqing University, Chongqing | |
400044, China^2 | |
Innovation Center for Metal Resources Utilization and Environment Protection, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, Nanning | |
530004, China^3 | |
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, National Engineering Laboratory for Vacuum Metallurgy, Faculty of Metallurgical and Energy Engineering, Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province, Kunming University of Science and Technology, Kunming | |
650093, China^4 | |
关键词: Dissolved oxygen concentrations; Elemental sulfur; Fast oxidation; Oxygen pressure; Pressure leaching; Quantitative study; Reaction mechanism; Sulfide anion; | |
Others : https://iopscience.iop.org/article/10.1088/1755-1315/295/5/052026/pdf DOI : 10.1088/1755-1315/295/5/052026 |
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学科分类:环境科学(综合) | |
来源: IOP | |
【 摘 要 】
In lab-scale experiments of oxidative pressure leaching of sphalerite, an interesting phenomenon is that the leaching liquor looks three main colors: black, red and green. In on-going work, semi-quantitative study is carried out to investigate such phenomenon, including drawing of predominance area color diagram, effect of sulfur surfactant on color of leaching liquor, color and stability of oxidation of leaching liquor. Experimental results show that color of the leaching liquor depends on leaching condition mainly including temperature, dissolved oxygen concentration, that experimental results show sulfur surfactant has no effect on the color of leaching liquor, that, with increased molar ratio of elemental sulfur and sodium sulfide, , x = 1 ∼ 8 is more stable, and that in oxidation of aqueous sulfide anion, to achieve reasonable fast oxidation kinetic, temperature of 150°C and oxygen pressure of 2 105 Pa is the minimum required conditions, which is coincide with such conditions to achieve reasonable fast oxidation kinetic in oxidation of aqueous ferrous iron. In this paper, different reaction mechanisms in given leaching condition were discussed.
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