Removal of Metallic Impurities from Off-Grade Copper Concentrate in Alkaline Solution - International Journal of Nonferrous Metallurgy

IJNM > Vol.7 No.2, April 2018

International Journal of Nonferrous Metallurgy

Volume 7, Issue 2 (April 2018)

ISSN Print: 2168-2054 ISSN Online: 2168-2062

Google-based Impact Factor: 0.63 Citations

Removal of Metallic Impurities from Off-Grade Copper Concentrate in Alkaline Solution ()

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DOI: 10.4236/ijnm.2018.72002 1,261 Downloads 3,114 Views Citations

Author(s)

Zhi-xiong Liu^1,2,3*, Lin Sun^1,2, Liang-dong Tang^1,2, Jie Hu^1,2, Yang Xiao^1,2, Yi-guang Chen⁴, Zhou-lan Yin⁵

Affiliation(s)

¹College of Physics and Mechanical & Electrical Engineering, Jishou University, Jishou, China.
²The Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology (the 2011 Plan of Hunan Province), Jishou University, Jishou, China.
³Key Laboratory of Mineral Cleaner Production and Exploit of Green Functional Materials in Hunan Province, Jishou University, Jishou, China.
⁴College of Biology and Environmental Sciences, Jishou University, Jishou, China.
⁵School of Chemistry and Chemical Engineering, Central South University, Changsha, China.

ABSTRACT

The removal of metallic impurities from off-grade copper concentrate was investigated in alkaline solution with H₂O₂. The analysis results of XRD and SEM-EDS revealed the oxidative mechanisms of all sulfides. The influence of various parameters of alkaline leaching were investigated including concentrations of sodium hydroxide and hydrogen peroxide, liquid to solid ratio, leaching time and temperature. The results showed that the removal rate of Mo, As and Zn were increased with increasing leaching time and H₂O₂ concentration, and that the removal rate of Mo, As and Zn were firstly increased and then slightly decreased with increasing liquid to solid ratio, temperature and NaOH concentration, respectively. More than 95% Mo, 94% As, and 94 % Zn are removed from the off-grade concentrate under the optimum conditions, while only 1.7% Cu is dissolved. These optimum conditions were sodium hydroxide 1.5 mol/L, hydrogen peroxide 1.0 mol/L, temperature 50°C, liquid to solid ratio 5/1 mL/g and leaching time 5 h.

KEYWORDS

Copper Concentrate, Impurities, Removal, Alkaline Leaching, Hydrogen Peroxide

Share and Cite:

Liu, Z. , Sun, L. , Tang, L. , Hu, J. , Xiao, Y. , Chen, Y. and Yin, Z. (2018) Removal of Metallic Impurities from Off-Grade Copper Concentrate in Alkaline Solution. International Journal of Nonferrous Metallurgy, 7, 9-23. doi: 10.4236/ijnm.2018.72002.

Cited by

[1]	Pyrometallurgical Removal of Arsenic from Electrostatic Precipitators Dusts of Copper Smelting
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[2]	Selective Leaching of Molybdenum from Bulk Concentrate by Electro-Oxidation
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[3]	Studying the impact of alkaline sulfide leaching parameters upon the efficiency of arsenic recovery from copper skimmings of lead production
	2020

[4]	Role of Carbon Fractionation and Microbial Inoculum in Bioremediation of Acid Mine Drainage
	2019

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