Results 201 to 210 of about 2,449 (244)

Kinetics of hydrochloric acid leaching of smithsonite

Russian Journal of Non-Ferrous Metals, 2011
The dissolution kinetics of smithsonite ore in hydrochloric acid solution has been investigated. As such, the effects of particle size (−180 + 150, −250 + 180, −320 + 250, −450 + 320 μm), reaction temperature (25, 30, 35, 40, and 45°C), solid to liquid ratio (25, 50, 100, and 150 g/L) and hydrochloric acid concentration (0.25, 0.5, 1, and 1.5 M) on the
Nikhil Dhawan, M. Sadegh Safarzadeh, Mustafa Birinci   +2 more
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Quantitative high-resolution cathodoluminescence spectroscopy of smithsonite

Mineralogical Magazine, 2004
AbstractFive smithsonite samples from locations in Germany, Mexico and Namibia have been investigated with cathodoluminescence (CL) spectroscopy and trace-element analyses. As with other carbonates, the CL properties of smithsonite are mainly controlled by Mn2+- and Fe2+-incorporation, because these elements are the most important activator and ...
T. Götte, D. K. Richter
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Effect of Ethylenediamine on Smithsonite Flotation

2017
Smithsonite, a typical zinc oxide mineral, has been developed for many years as an alternative source. However, restricted to inferior ability of floating, zinc oxide is one well-known refractory mineral with poor selectivity and high regent consumption. In this paper, ethylenediamine (NH2CH2CH2NH2) was selected to active flotation of smithsonite using
Chao Lv, Shuming Wen, Shaojun Bai, Kun Yang   +3 more
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Smithsonite flotation using potassium amyl xanthate and hexylmercaptan

Mineral Processing and Extractive Metallurgy, 2006
AbstractThe influence of potassium amyl xanthate (KAX) and hexylmercaptan (HM) adsorption on smithsonite surface at various concentrations were investigated through using zeta potential, contact angle, microflotation and diffuse reflectance FTIR studies at different pH.
S. H. Hosseini, E. Forssberg
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Note sur des cristaux de smithsonite

Bulletin de la Société française de Minéralogie, 1906
Buttgenbach Henri Jean-François. Note sur des cristaux de smithsonite. In: Bulletin de la Société française de Minéralogie, volume 29, 4, 1906. pp. 190-192.
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Alkaline Hydrometallurgy of Low-Grade Smithsonite Ores

2017
Low-grade smithsonite ores are leached using alkaline leaching solution. The zinc and lead concentrates can be obtained from lean oxidized zinc ores by alkaline leaching followed by two-step sulfide precipitation of lead and zinc sulfides. It is found that over 85% of both Zn and Pb and less than 10% of Al can be leached from the ore when the leaching ...
Zhao Youcai, Zhang Chenglong
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Dissolution regularities of smithsonite in methane sulfonic acid

Russian Journal of Non-Ferrous Metals, 2015
Methane sulfonic acid (MSA) was proposed as a clean and efficient leaching agent to extract zinc from smithsonite. Experimental variables such as acid concentration, reaction temperature, particle size, and stirring speed were considered. Results indicated that zinc leaching fraction increased with increased MSA concentration, reaction temperature ...
Qicheng Feng, Shuming Wen, Wenjuan Zhao, Xv Bai, Yu Chen   +4 more
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Dissolution kinetics of smithsonite ore in ammonium chloride solution

Hydrometallurgy, 2005
Abstract The results of a dissolution kinetics study of smithsonite ore in ammonium chloride are presented. Effect of stirring speed, ore particle size, reaction temperature, and the concentration of ammonium chloride on zinc dissolution rate are determined.
Shaohua Ju, Tang Motang, Yang Shenghai, Li Yingnian   +3 more
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Smithsonite from the Rhodesia Broken Hill mines

Mineralogical Magazine and Journal of the Mineralogical Society, 1926
During an examination of zinc ores I had occasion recently to employ methods for the identification of smithsonite, and was surprised to find how scanty and indefinite are the data of its physical properties as stated in text-books. Most of the smithsonite known occurs either compact or as very small crystals many of which are of a composite nature. In
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smithsonite

2014
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