Fatty acid flotation versus BHA flotation of tungsten minerals and their performance in flotation practice

Han, Haisheng; Hu, Yuehua; Sun, Wei; Li, Xiaodong; Cao, Chonggao; Liu, Runqing; Yue, Tong; Meng, Xiangsong; Guo, Yanzhe; Wang, Jianjun; Gao, Zhiyong; Pan, Chen; Huang, Weixue; Liu, Jie; Xie, Jiawen; Chen, Yulin

doi:10.1016/j.minpro.2016.12.006

Cited by 161 publications

(54 citation statements)

References 27 publications

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“…Flotation techniques have been extensively applied to separate scheelite and fluorite. The traditional scheelite flotation method is the Petrov method [3], which is flotation with high alkalinity, strong stirring, high temperature, high water glass concentration, and high-concentrate pulp. The harsh flotation process conditions make mineral processing an expensive and complex process, and the labor intensity of workers increases [4].…”

Section: Introductionmentioning

confidence: 99%

Flotation Separation of Scheelite from Fluorite Using Sodium Polyacrylate as Inhibitor

Zhang

Chen

et al. 2017

Minerals

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Abstract:The depressing properties of sodium polyacrylate (PA-Na) for scheelite and fluorite were studied by micro-flotation tests, infrared spectroscopy (IR), zeta potentials, X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT). The flotation results reveal that the selective depression effect of PA-Na is better than that of sodium silicate, and PA-Na can depress fluorite more effectively than scheelite. The flotation recovery of scheelite and fluorite keeps at about 75% and 10%, respectively, at the pulp pH 9.3~9.6 and PA-Na concentration from 30 to 50 mg/L. IR spectra results suggest that PA-Na has a chemical effect on the surface of scheelite and fluorite. The zeta potential of fluorite becomes more negative than that of scheelite after PA-Na addition. XPS analysis deduces the occurrence of chemisorption between PA-Na and mineral surfaces, and the chemisorption of PA-Na on fluorite is stronger than on scheelite. DFT demonstrates that the absolute value of the adsorption energy in the presence of PA-Na is larger on the fluorite {111} surface than on the scheelite {111} surface. Thus, fluorite is more readily depressed than scheelite, which remarkably matches the micro-flotation test results.

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Section: Introductionmentioning

confidence: 99%

Flotation Separation of Scheelite from Fluorite Using Sodium Polyacrylate as Inhibitor

Zhang

Chen

et al. 2017

Minerals

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“…It was also observed that the flotation recovery increases with the increasing pH of solution until it reaches the value of 9, where the maximum recovery is achieved for both milled particles [32].…”

Section: Micro-flotation Experiments Resultsmentioning

confidence: 87%

“…In the past 2 years, our group prepared a novel metal-organic complex, i.e., lead-benzohydroxamic acid (BHA) complex. This complex, as a collector, was successfully applied to the selective flotation of scheelite from gangues in Shizhuyuan Ore, leading to a significant increase in the comprehensive recovery of WO 3 by 8-10% [32,33]. However, when we used this complex in Xingluokeng Ore, some obvious differences in the flotation behavior and recovery of scheelite were observed compared with those in Shizhuyuan Ore. We thought that the differences were mainly caused by the different mill media and ore type.…”

Section: Introductionmentioning

confidence: 97%

Tuning the Morphology and Surface Property of Mineral Particles by Grinding Media

Gao¹,

Li²

2018

Abrasive Technology - Characteristics and Applications

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Grinding of minerals for particle size reduction and liberation is a prerequisite for successful mineral flotation separation and powder modification. Different grinding media produce mineral particles with different physical morphology and surface chemistry properties. Different mill particles expose different proportions of cleavage surfaces which lead to different shape indexes and different surface reactivities to organics, such as collector. Rod mill produces scheelite particles with a higher exposure of more reactive {101} surface that are beneficial for a stronger interaction with collector. More exposure of {101} surface also causes the rod mill particles to possess such values as larger elongation and flatness that are essential for particles attachment to air bubbles by shortening the induction time. The rod mill particles have a lower critical surface tension, greater hydrophobicity and a better flotation recovery when treated with the collector. In addition, the rod mill particles with a narrow particle size distribution have a smaller specific surface area, so the full monolayer adsorption of the collector on their surfaces can be achieved at a relatively lower concentration. These findings will help establish the relation between the particle surface physicochemistry and wettability, hence providing valuable guidance for the optimization of flotation separation and powder modification technology.

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“…In addition, some fine cassiterite minerals occur in nature in association with tungsten minerals, while neither recovering cassiterite from the flotation tailings of tungsten minerals, nor the synchronous extraction of them, are practicable because of the great differences between tungsten minerals and cassiterite. Our previous studies [9,10] indicated that Pb-BHA complexes had good selectivity for the separation of scheelite from calcium minerals by regulating the Pb/BHA ratio and pH value with the recovery of tungsten minerals being significantly improved. Tian et al [11] proved that cassiterite can be separated efficiently from cassiterite-calcite binary mixed minerals by using Pb-BHA complexes as the collector, and carboxymethyl cellulose as the depressant.…”

Section: Introductionmentioning

confidence: 99%

Beneficiation and Purification of Tungsten and Cassiterite Minerals Using Pb–BHA Complexes Flotation and Centrifugal Separation

Yue

Han

et al. 2018

Minerals

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Pb–BHA complexes have been shown to be selective for the separation of tungsten and cassiterite minerals from calcium minerals. These minerals could be enriched synchronously to some extent using Pb–BHA complexes flotation. However, it is difficult to further improve the quality and recovery of the scheelite, wolframite, and cassiterite concentrate due to their different behavior in flotation, such as flotation rate and sensitivities to depressants. Moreover, the super fine particles create some challenges for the cleaning flotation process. In this study, advanced gravity separators for super fine particles were introduced for the cleaning process based on the slight difference in the specific gravity of scheelite, wolframite, and cassiterite. The new process featured pre-enrichment using Pb–BHA flotation, and upgrading using gravity separation, taking into account both the similarities and differences in floatability and density of the different minerals. The grades of WO3 and Sn in the concentrate of the new process reached to 61% and 2.89%, respectively, and the recovery of Sn was significantly improved. In addition, gravity separation is highly efficient, cost effective, and chemical-free, which is environmentally friendly. This study has proven that physical separation can be used for the purification of flotation products and provide some solutions for separation problems of complex refractory ores, which has, up until now, been rarely reported in the literature and/or applied in mineral processing.

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Fatty acid flotation versus BHA flotation of tungsten minerals and their performance in flotation practice

Cited by 161 publications

References 27 publications

Flotation Separation of Scheelite from Fluorite Using Sodium Polyacrylate as Inhibitor

Flotation Separation of Scheelite from Fluorite Using Sodium Polyacrylate as Inhibitor

Tuning the Morphology and Surface Property of Mineral Particles by Grinding Media

Beneficiation and Purification of Tungsten and Cassiterite Minerals Using Pb–BHA Complexes Flotation and Centrifugal Separation

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