Effect of iron concentration on the crystallization and electronic structure of sphalerite/marmatite: A DFT study

Deng, Jiushuai; Lai, Hao; Chen, Miao; GLEN, M.; Wen, Shuming; Zhao, Biao; Liu, Zilong; Yang, Hua; Liu, Mingshi; Huang, Lingyun; Guan, Shiliang; Wang, Ping

doi:10.1016/j.mineng.2019.02.012

Cited by 47 publications

(11 citation statements)

References 40 publications

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“…Although galena and sphalerite in the study were highly pure natural minerals, yet the surface changes of the minerals during grinding were still likely to be very complex. 39 Recent studies have shown that galena and sphalerite contain rich fluid inclusions that can be destroyed by grinding, and the components will be released into the ore pulp, which affects the subsequent surface adsorption and flotation. 11,40,41 In addition, the dissolution of the minerals, as well as the effects of O 2 and H 2 O, also affects the mineral surface component.…”

Section: Resultsmentioning

confidence: 99%

Study on the Interaction between Galena and Sphalerite During Grinding Based on the Migration of Surface Components

et al. 2019

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In Pb–Zn ore flotation, unintentional activation of sphalerite often leads to difficult separation of Pb and Zn minerals, during which grinding plays a key role in unintentional activation. Therefore, the aim of this study was to evaluate the surface component changes of two different mineral particles and to propose the interaction between galena and sphalerite during mixed grinding using time-of-flight secondary ion mass spectrometry (ToF-SIMS). The results show that after mixed grinding of the galena and sphalerite, the Pb content on the sphalerite surface increased with the decrease of Zn and Fe contents on the sphalerite surface. The lead ions from galena were obviously absorbed onto the sphalerite surface, while the zinc and iron ions from sphalerite were not obviously migrated to the galena surface. Principal component analysis (PCA) of a dataset composed of 206 positive ion peaks of galena and sphalerite indicates that the surface components of galena and sphalerite migrated from either side to different degrees. This study successfully identified an important factor for unintentional activation of lead and zinc minerals during flotation: homogenization of surface components of different minerals during grinding.

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Section: Resultsmentioning

confidence: 99%

Study on the Interaction between Galena and Sphalerite During Grinding Based on the Migration of Surface Components

et al. 2019

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“…Electronic structural properties play a crucial role in the performance of batteries and smart window devices [ 34 , 36 , 39 , [61] , [62] , [63] , [64] ]. The main goal of DFT simulation is to use electron density instead of the wave function as the basic quantity of calculation.…”

Section: Dft Simulationmentioning

confidence: 99%

Smart thermally responsive perovskite materials: Thermo-chromic application and density function theory calculation

Ning

Chen

Wang

et al. 2023

Heliyon

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“…However, using CIB in grinding inevitably results in Fe contaminations. It has been reported that Fe contamination has deleterious effects on flotation of a great number of minerals, such as sulfide minerals, − platinum group metal (PGM), carbonate minerals, and so on, whereas using inert grinding media such as ceramic ball (CB) can enhance the sulfide flotation performance. − Nevertheless, Zhu and Yu and Hu and Sun found that using CIB in grinding could increase the flotation recovery of beryl and spodumene. The adhered iron fillings on the fresh beryl and spodumene surfaces would be oxidized to Fe ions, which activated the flotation of beryl and spodumene.…”

Section: Introductionmentioning

confidence: 99%

Effects and Mechanisms of Grinding Media on the Flotation Behavior of Scheelite

Yao

Zhang

et al. 2020

ACS Omega

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Grinding, an essential procedure for size reduction and fresh surface exposure of mineral particles, plays an important role in mineral flotation. The grinding media are the key factors for effective grinding and thus for successful flotation. In this study, ceramic ball (CB) and cast iron ball (CIB), two representative grinding media, were chosen to investigate the effects and mechanisms of grinding media on the flotation behavior of scheelite. The results of pure scheelite flotation show that scheelite ground by CB has a better floatability than that ground by CIB. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and X-ray photoelectron spectroscopy (XPS) analyses indicate that there are Fe species, namely, elemental iron (Fe), ferrous oxide (FeO), and iron oxyhydroxide (FeOOH), coated on the surfaces of scheelite ground by CIB but not in the case of scheelite ground by CB. The dissolved oxygen (DO) and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) tests show that Fe ions exist in the CIB grinding slurry but not in the case of CB grinding slurry. Compared with the CB grinding slurry, the CIB grinding slurry has a lower DO content and higher Ca ion concentration. Zeta potential results reveal that the Fe species in the CIB grinding reduce the NaOl adsorption on the scheelite surfaces. Finally, the deleterious effect of CIB grinding on the flotation behavior of scheelite is verified by the actual scheelite ore flotation experiments.

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Effect of iron concentration on the crystallization and electronic structure of sphalerite/marmatite: A DFT study

Cited by 47 publications

References 40 publications

Study on the Interaction between Galena and Sphalerite During Grinding Based on the Migration of Surface Components

Study on the Interaction between Galena and Sphalerite During Grinding Based on the Migration of Surface Components

Smart thermally responsive perovskite materials: Thermo-chromic application and density function theory calculation

Effects and Mechanisms of Grinding Media on the Flotation Behavior of Scheelite

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