The flotation separation of scheelite from calcite using acidified sodium silicate as depressant

Feng, Bo; X, Luo; Wang, Jinqing; Wang, Pengcheng

doi:10.1016/j.mineng.2015.06.017

Cited by 181 publications

(26 citation statements)

References 16 publications

(12 reference statements)

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“…In addition, most of the literature related to the separation of scheelite was in the area of otation for improving the grade after crushing by ne particles. [9][10][11] No signi cant literature on jig separation of scheelite was found.…”

Section: Introductionmentioning

confidence: 99%

Application of Jig Separation for Pre-Concentration of Low-Grade Scheelite Ore

Baek

Jeon

2018

Mater. Trans.

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Jig separation, one of the oldest methods of gravity separation, is commonly used to reduce the costs of subsequent processes by pre-concentrating the valuable minerals from the product following coarse particle crushing. In this study, jig separation was used to preconcentrate scheelite prior to grinding for the next process. Experiments were carried out using 0.21 to 5 mm samples, in order to determine and evaluate optimal conditions by varying factors, including the thickness of the bed, the water ow rate and the number of scavenging. The results of the experiments show that when pre-concentration of low-grade scheelite ore (0.75% WO 3) using jig separation is conducted, a concentrate with a mass percentage of about 22.0%, a WO 3 grade of about 3.1% and WO 3 recovery of about 90.0% can be obtained. It is therefore expected that when this concentrate is supplied to the next separation process, the grade, economic feasibility, and separation ef ciency will be improved compared with separations that do not involve a pre-concentration.

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Section: Introductionmentioning

confidence: 99%

Application of Jig Separation for Pre-Concentration of Low-Grade Scheelite Ore

Baek

Jeon

2018

Mater. Trans.

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“…The malachite sample used for the experiments was obtained from Dongchuan in the Yunnan Province of China. The samples were crushed and ground using an agate mortar to obtain a size fraction of -75 µm + 38 µm for the flotation experiments, and finer particles sized less than 5 µm were used for the zeta potential measurements, adsorption and desorption experiments (Bo et al, 2015). The results of the Xray diffraction analysis (D/Max 2200, Rigaku, Japan) of the malachite mineral confirmed that the malachite structure did not have any apparent impurities.…”

Section: Methodsmentioning

confidence: 99%

Effect of sulfidization on the stability of adsorption of isoamyl xanthate on malachite

Wen¹,

Deng²

2020

Physicochem. Probl. Miner. Process.

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The activity and stability of adsorbed isoamyl xanthate (IX) on a malachite surface before and after sulfidization were studied by calculating the malachite dissolved component and adsorption energy and performing experiments the zeta potential measurements, adsorption and desorption, and flotation experiments. In the malachite slurry solution, the main components of copper are Cu 2+ , CuCO3, HCuO2-, CuO2-, and Cu(CO3)2 2-, and the concentration distribution of these components was related to the slurry pH value. Between pH 5 to 9, the main copper component in the slurry was CuCO3. The malachite surface was negatively charged; however, the sulfur ions or hydrosulfide ions could still adsorb on the surface at a pH of more than 8.2, which indicated that the sulfidization of malachite corresponds to the chemical adsorption, and the surface electrical properties of the malachite were not obvious to the sulfidization. The adsorption activity of malachite on IX was stronger than that of the sulfide malachite; however, the desorption ratio of IX concerning the malachite was higher than that of the sulfide malachite. The adsorption energy of IX on the malachite and sulfide malachite surface was-449.6 kJ/mol and-1134.7 kJ/mol, respectively, and the IX adsorbed on the sulfide malachite surface was more stable. The flotation experiments indicated that the sulfidization of malachite reduced the consumption of IX; however, the recovery of malachite was improved.

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“…Also, the depressants used for gangue minerals depression, such as organic colloids (dextrine, starch), quebracho tannin, sodium phosphates, sodium silicate solutions containing polyvalent cations (hydrosols), etc. [7,[12][13][14], depress tungsten minerals and cassiterite recovery to some extent. However, it is hard to gain good further separation of the tungsten and cassiterite minerals by flotation with multiple attempts.…”

Section: Introductionmentioning

confidence: 99%

“…Those low-grade tungsten deposits are usually in finely disseminated form with a complicated composition, containing high calcium gangue minerals and multi valuable minerals, which create many challenges for tungsten extraction. Firstly, separation of scheelite from other calcium-bearing minerals by flotation is challenging due to their very similar surface properties [5][6][7][8]. Most attempts have only achieved limited success or specific application (related to the type or the location of the ore).…”

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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The flotation separation of scheelite from calcite using acidified sodium silicate as depressant

Cited by 181 publications

References 16 publications

Application of Jig Separation for Pre-Concentration of Low-Grade Scheelite Ore

Application of Jig Separation for Pre-Concentration of Low-Grade Scheelite Ore

Effect of sulfidization on the stability of adsorption of isoamyl xanthate on malachite

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

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