Journal ArticleDOI
Bioleaching and electrochemical property of marmatite by Leptospirillum ferrooxidans
TLDR
In this paper, the effects of several variables on the bio-leaching of marmatite with pure L. ferrooxidans were investigated, and the results showed that zinc extraction increases with the decrease of pulp density.About:
This article is published in Transactions of Nonferrous Metals Society of China.The article was published on 2013-02-01. It has received 18 citations till now. The article focuses on the topics: Bioleaching.read more
Citations
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Journal ArticleDOI
Stepwise bioleaching of Cu-Zn mixed ores with comprehensive utilization of silver-bearing solid waste through a new technique process
Hongbo Zhao,Hongbo Zhao,Xiaowen Gan,Xiaowen Gan,Jun Wang,Jun Wang,Lang Tao,Lang Tao,Wenqing Qin,Wenqing Qin,Guanzhou Qiu,Guanzhou Qiu +11 more
TL;DR: In this article, a new technique process for processing Cu-Zn mixed ores containing chalcopyrite and marmatite was proposed to avoid the complex CuZn flotation and extraction separation processes, as well as for the comprehensive utilization of abandoned silver-containing zinc leaching residue.
Journal ArticleDOI
Thermal behavior of zinc sulfide concentrates with different iron content at oxidative roasting
TL;DR: In this paper, the phase content of zinc concentrates was investigated using Mossbauer spectroscopy as well as chemical, XRD, DTA and TGA analyses, and the results were used to choose the charge of concentrates for optimal oxidative roasting in fluidized bed furnace.
Journal ArticleDOI
Kinetics of Fe(III)-Fe(II) redox half-reactions on sphalerite surface
TL;DR: In this paper, the authors investigated the kinetics of Fe(III)-Fe(II) redox half-reactions on the sphalerite surface in 0.5 mM sulfuric acid in the temperature range of 22-65°C.
Journal ArticleDOI
The mechanism of electrochemical dissolution of sphalerite in sulfuric acid media
TL;DR: In this paper, the dissolution of sphalerite concentrate from Angouran mine was studied in 0.5 M sulfuric acid solution by the application of carbon paste electrode at 22°C.
Journal ArticleDOI
Bioleaching of complex polymetallic sulfide ores by mixed culture
TL;DR: In this paper, the results show that bio-leaching of jamesonite is not accessible, the iron extraction rate of pyrrhotite bioleaching reaches 98.2% after 26 d, and the zinc extraction rate reached 92.3% after 29 d. The corresponding metal extraction rate decreases with the increase of pulp density.
References
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Journal ArticleDOI
New information on the chalcopyrite bioleaching mechanism at low and high temperature
TL;DR: In this article, an electrochemical study of chalcopyrite was performed, which included the elimination or dissolution of possible diffusion barriers formed on the mineral surface, and a study of possible causes that diminish the dissolution rate and inhibit the attack of this sulphide mineral.
Journal ArticleDOI
Chemical and electrochemical basis of bioleaching processes
G.S. Hansford,Tomás Vargas +1 more
TL;DR: In this paper, it has been shown that the first two sub-processes of chemical ferric reaction with the mineral and bacterial oxidation of the ferrous iron are linked by the redox potential.
Journal ArticleDOI
Electrochemical impedance models for molten salt corrosion
C.L. Zeng,Wei Wang,W. T. Wu +2 more
TL;DR: In this article, four electrochemical impedance models were proposed to represent the electrochemical responses in molten-salt systems at the open-circuit potential, taking into account the chemical stability and scaling features of metals.
Journal ArticleDOI
A comparison of the kinetics and mechanism of acid leaching of sphalerite containing low and high concentrations of iron
TL;DR: In this article, the leaching behavior of three Fe-containing sphalerite minerals (0.45, 11.40, and 12.90 wt.% Fe) was investigated at pH 1 in O2-purged HClO4 from 25 to 85 °C.
Journal ArticleDOI
Metal sulfide semiconductor electrochemical mechanisms induced by bacterial activity
H Tributsch,J.A Rojas-Chapana +1 more
TL;DR: In this article, the bacterial attack on the sulfide surface is based on the use of recyclable chemical species (H+, Fe2+, thiol-compound) which disrupt chemical bonds in sulfide interface and thereby induce disintegration.
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