Alkaline leaching Zn and its concomitant metals from refractory hemimorphite zinc oxide ore

Chen, Ailiang; Zhao, Zhong wei; Xi-jun, Jia; Long, Shuang; Huo, Guangsheng; Chen, Xingyu

doi:10.1016/j.hydromet.2009.01.005

Cited by 111 publications

(37 citation statements)

References 7 publications

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“…In either case, incorporation of As in the hemimorphite lattice attenuates its mobility and bioavailability. Similarly, hemimorphite may play important roles in the transport and bioavailability of heavy metals (Pb, Cu and Cd) in Zn mine tailings (Table 1; Schaider et al, 2007;Cabala et al, 2009;Chen et al, 2009;Gallegos et al, 2009).…”

Section: Hemimorphite As a Natural Sink For As In Zn Deposits And Relmentioning

confidence: 99%

Hemimorphite as a natural sink for arsenic in zinc deposits and related mine tailings: Evidence from single-crystal EPR spectroscopy and hydrothermal synthesis

Mao

Lin

Pan

2010

Geochimica et Cosmochimica Acta

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Section: Hemimorphite As a Natural Sink For As In Zn Deposits And Relmentioning

confidence: 99%

Hemimorphite as a natural sink for arsenic in zinc deposits and related mine tailings: Evidence from single-crystal EPR spectroscopy and hydrothermal synthesis

Mao

Lin

Pan

2010

Geochimica et Cosmochimica Acta

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“…With the availability of zinc sulfide ores dwindling, the need to identify alternative ores is imperative [1,2]. Zinc oxide ores are recently being considered as an appropriate alternative.…”

Section: Introductionmentioning

confidence: 99%

Microwave and Ultrasound Augmented Leaching of Complicated Zinc Oxide Ores in Ammonia and Ammonium Citrate Solutions

Zhang

Peng

et al. 2017

Metals

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Recovery of zinc from low grade zinc oxide ore is attempted with ammonia and ammonium citrate solutions augmented by microwave roasting and ultrasound radiation. The influence of the ammonia-ammonium ratio, roasting temperature, ultrasound power, and leaching time were assessed on the recovery of zinc. A maximum zinc recovery of 88.57% could be achieved at a roasting temperature of 673 K, leaching temperature of 298 K, stirring speed of 300 rpm, total ammonia concentration of 5 mol/L with an ammonium citrate concentration of 1.2 mol/L, liquid to solid ratio of 5:1, the ultrasound power was 600 W and the leaching time was 120 min. The enhancement in recovery with increases in the roasting temperature up to 673 K was attributed to the conversion of ZnCO 3 to ZnO. The phases of mineral samples and the reaction residues were characterized by X-ray diffraction (XRD).

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“…Zinc oxide ores are subjected mainly to two treatments, namely, pyrometallurgy and wet metallurgy [7,8]. The former brings about serious environmental pollution, whereas the latter, with favourably high metal leaching rate and low cost, could better satisfy environmental requirements [9].…”

Section: Introductionmentioning

confidence: 99%

Dissolution Kinetics of Zinc Oxide Ore with an Organic Acid

Deng¹,

Sun²,

Lin³

et al. 2015

Int J Metall Mater Eng

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In this study, the dissolution kinetics of smithsonite as an alternative zinc source in trichloroacetic acid (TCA) solution was investigated. TCA can be derived from industrial waste acid in the pharmaceutical, biotechnology and chemical fields. Results showed that the dissolution kinetics conformed to the shrinking core model controlled by surface chemical reaction. The apparent activation energy of the reaction was calculated as 47.61 kJ/mol, indicating the obvious effect of temperature on the reaction rate. The reaction kinetic equation associated with the main influencing factors was eventually established as 1-(1-x) -1/3 = [0.0002 (C) 0.384 (P) 0.969 exp(-5726T)] t. The high reaction speed of smithsonite in TCA solution shows that TCA has a dissolution effect on zinc oxide ores; thus, it can be employed as an advantageous organic leaching reagent environmentally friendly. In addition, the experimental parameters obtained provide basic data and reference for the leaching of other carbonate minerals of copper, zinc, lead and cobalt, among others, in an organic acid system.

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Alkaline leaching Zn and its concomitant metals from refractory hemimorphite zinc oxide ore

Cited by 111 publications

References 7 publications

Hemimorphite as a natural sink for arsenic in zinc deposits and related mine tailings: Evidence from single-crystal EPR spectroscopy and hydrothermal synthesis

Hemimorphite as a natural sink for arsenic in zinc deposits and related mine tailings: Evidence from single-crystal EPR spectroscopy and hydrothermal synthesis

Microwave and Ultrasound Augmented Leaching of Complicated Zinc Oxide Ores in Ammonia and Ammonium Citrate Solutions

Dissolution Kinetics of Zinc Oxide Ore with an Organic Acid

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