Results 151 to 160 of about 900 (198)

Novel 3-Tetradecylamine Propyl Amidoxime Collector for Selective Adsorption on the Surface of Smithsonite for Flotation Separation of Smithsonite from Calcite

Industrial & Engineering Chemistry Research, 2023
Smithsonite has similar physicochemical properties and floatability to calcite, which makes it difficult to achieve flotation separation of smithsonite from calcite with conventional collectors. In this article, a novel 3-tetradecylamine propyl amidoxime (TPA) collector was prepared for the flotation of smithsonite.
Liaoyuan Ouyang, Zhiqiang Huang, Hongling Wang, Guichun He, Xinyang Yu, Vladimir E. Burov, Vladimir Z. Poilov, Fangxu Li, Rukuan Liu, Wenyuan Li, Shuyi Shuai, Shiyong Zhang, Chen Cheng, Weng Fu   +13 more
openaire   +3 more sources

Study on the sulfidation behavior of smithsonite

Applied Surface Science, 2015
Abstract Zinc extraction from low-grade mineral resources of oxidized zinc has recently become a focus of study. Sulfidation is an important process in oxidized ore flotation. In this study, the influence of sulfur ion adsorption on smithsonite surface was investigated with the use of zeta potential, inductively coupled plasma (ICP), scanning ...
Dandan Wu, Shuming Wen, Jiushuai Deng, Jian Liu, Yingbo Mao   +4 more
openaire   +1 more source

Experimental determination of thermodynamic characteristics of smithsonite

The Journal of Chemical Thermodynamics, 2012
Abstract The heat capacity of natural zinc carbonate (smithsonite, ZnCO3) has been measured by the method of low-temperature adiabatic calorimetry over the temperature range of (4.4 to 320) K. Its thermodynamic functions have been calculated based on the experimental data on the heat capacity.
М.R. Bissengaliyeva, D.B. Gogol, Sh.T. Taimassova, N.S. Bekturganov   +3 more
openaire   +1 more source

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
openaire   +1 more source

Optical and EPR investigations on smithsonite minerals

Radiation Effects and Defects in Solids, 2004
Optical and EPR investigations have been made on two smithsonite (ZnCO3) minerals, one originating from the USA and the other from the UK. The optical spectra reveal the existence of Cu(II) as impurity in both the samples; and site symmetry for Cu(II) is confirmed to be tetragonally distorted octahedral.
B. J. Reddy, J. Yamauchi, R. V. S. S. N. Ravikumar, A. V. Chandrasekhar, M. Venkataramanaiah   +4 more
openaire   +1 more source

Bonds, bands and elasticity of smithsonite rock

Solid State Communications, 2013
Abstract The objective here is to spread out in detail the various fundamental state properties of smithsonite rock (ZnCO 3 ) for which the most intrinsic quantities remain still unknown. First-principles electronic structure calculations based on the density functional theory with the pseudopotential method were performed using diverse functionals ...
Bouibes, A., Zaoui, Ali, Tunega, Daniel
openaire   +3 more sources

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
openaire   +1 more source

Contribution of Ammonium Ions to Sulfidation-Flotation of Smithsonite

Journal of the Taiwan Institute of Chemical Engineers, 2017
Abstract Sulfidation-flotation is commonly performed to recover base metal oxide ores. Sulfidation could become the key process in recovering zinc from zinc oxide ores. We investigated the common zinc oxide mineral. An ammonium salt was used to enhance sulfidation-flotation of smithsonite.
Dandan Wu, Jiushuai Deng, Shaojun Bai
exaly   +2 more sources

Physicochemical aspects of smithsonite flotation

2014
The wide use of zinc and the exhaustion of traditional sulfide zinc resources provide the motivation to consider oxide zinc mineral resources. Smithsonite is the most abundant nosulfide zinc mineral but it is hard to be separated from other carbonate minerals by flotation techniques.
openaire   +1 more source

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
openaire   +1 more source