Mechanism of manganese ion interaction with the surface of scheelite and calcite and its effect on flotation separation

Guan, Zhenhao; Lu, Kuanwei; Zhang, Ying; Yang, Hu; Li, Xiaokang

doi:10.1016/j.colsurfa.2022.129397

Cited by 9 publications

(5 citation statements)

References 32 publications

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“…However, in natural ore deposits, calcite (CaCO3), a typical calciumcontaining mineral, is the most common gangue mineral densely associated with scheelite. (Guan et al, 2022). When using fatty acids as collector, calcite exhibits almost the same flotation behavior with that of scheelite due to their similar surface Ca 2+ active site .…”

Section: Introductionmentioning

confidence: 90%

“…Tungsten, a crucial metallic element, is widely applied in high-tech product manufacturing areas due to its special properties of high melting point, low-sputter erosion rate, high density and good radiation resistance (Faramarzpour et al, 2022;Guan et al, 2022). Among numerous tungsten-bearing minerals, only wolframite [(Fe, Mn)WO4] and scheelite (CaWO4) have utilization value in industry .…”

Section: Introductionmentioning

confidence: 99%

“…In scheelite flotation process, fatty acids reagents (e.g. sodium oleate, tall oil and oxidized paraffinum sodium salt) are often applied as collectors to effectively enhance the floatability of scheelite, which can be adsorbed on its surface via exposed Ca 2+ active site (Guan et al, 2022;Chen et al, 2020). However, in natural ore deposits, calcite (CaCO3), a typical calciumcontaining mineral, is the most common gangue mineral densely associated with scheelite.…”

Section: Introductionmentioning

confidence: 99%

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Application of Diethylenetriaminepenta pentasodium salt as an eco-friendly depressant to effectively improve the flotation separation of scheelite and calcite

Zhou,

Wu,

Guo

et al. 2023

Physicochem. Probl. Miner. Process.

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Diethylenetriaminepenta (methylene-phosphonic acid) pentasodium salt (DTPMPA), an eco-friendly reagent, was tried for the first time as a depressant for flotation separation of scheelite from calcite. Micro-flotation tests show that DTPMPA can selectively depress the floatability of calcite. In contrast, DTPMPA barely affects the flotation behavior of scheelite. Based on the selective depress effect, floatation separation of scheelite and calcite can be effectively achieved by using DTPMPA as depressant in artificially mixed minerals flotation tests. Based on a series of measurements, it found the surface of calcite was positively charged due to the existence of Ca ion site, which can be chelated with -PO3H- functional group on the surface of DTPMPA. In the flotation process, DTPMPA can be chemically absorbed on the surface of calcite to inhibit further collector adsorption. On contrast, little DTPMPA was adsorbed on the surface of scheelite due to the spatial site resistance and electrostatic repulsion induced by surface WO42+. All in all, these results exhibit DTPMPA has excellent selective depression ability on calcite, which can be potentially applied in the actual scheelite flotation process.

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of Diethylenetriaminepenta pentasodium salt as an eco-friendly depressant to effectively improve the flotation separation of scheelite and calcite

Zhou,

Wu,

Guo

et al. 2023

Physicochem. Probl. Miner. Process.

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“…Guan [151] et al studied the effect of Mn 2+ on the sodium oleate-sodium silicate system for scheelite flotation. The experimental results showed that the maximum difference for scheelite and calcite recovery reached 82.84% after the addition of Mn 2+ .…”

Section: Metallic Saltsmentioning

confidence: 99%

Research Progress with Scheelite Flotation Reagents: A Review

Lu,

Ding,

et al. 2023

Minerals

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With the depletion of easily mined and separated wolframite, scheelite has become the primary source of tungsten. Flotation is the primary technique used to enrich scheelite. However, flotation separation of scheelite from calcium-bearing gangue minerals, such as calcite and fluorite, has always been challenging due to their similar surface properties. To date, various flotation reagents and related mechanisms have been proposed for scheelite, which have attracted considerable attention. This paper reviews the scheelite flotation reagents, including collectors and regulators, and introduces recent research progress on the mechanisms for the interactions between the flotation reagents and mineral surfaces. The advantages and limitations of different flotation reagents are discussed. Inorganic or organic inhibitors in combination with fatty acids, chelate collectors, and cationic collectors are commonly used to separate scheelite from calcium-bearing gangue. Flotation differences between the scheelite and calcium-bearing minerals can be explained by variations in the electrical charges and steric hindrance at the mineral surfaces. In the future, fatty acid collectors will be still the main collectors used in scheelite flotation due to their low cost and strong collecting ability, and new collectors with high selectivity (such as metal complex collectors, new chelate collectors, new environmental collectors) will become a new research hotspot in the future due to their good selectivity.

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“…Scheelite (CaWO4), a typical tungstate mineral, is diffusely applied in the production of high-tech products (Feng et al, 2018;Guan et al, 2022). However, in natural, scheelite usually is associated with calcite (CaCO3) due to its low grade, the presence of multifarious trace elements, and complex mineral composition Dong et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Effective flotation separation of scheelite and calcite by applying methylene phosphonic acid sodium as a novel and green depressant

Zhou¹,

Hao²,

Guo³

et al. 2023

Physicochem. Probl. Miner. Process.

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It is known that the flotation separation of scheelite and calcite is quite difficult due to their similar surface properites. To slove the problem, ethylenediaminetetra (methylene phosphonic acid) sodium (EDTMPS), an environmentally friendly reagent, was employed as an efficient depressant for flotation separation of calcite for the first time. In flotation experiments, it demonstrates that EDTMPS could strongly inhibit the flotation of calcite but barely affect the flotaiton behavior of scheelite, showing excellent dpress ability and selectivity. Based on a series of measurements including contact angle analysis, zeta potential, and XPS analysis, it was found that large amout of EDTMPS could be absorbed on the surface of calcite through strong chemical chelation reaction and thus inhibiting the further adsorption of NaOL. On the contrary, little EDTMPS was absorbed on that of scheelite owing to the negatively charged tungstate ions on the surface in relative terms. All in all, these results exhibit EDTMPS has excellent selective inhibition ability on calcite, which can be potentially applied in actual scheelite and calcite flotation separation process.

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Mechanism of manganese ion interaction with the surface of scheelite and calcite and its effect on flotation separation

Cited by 9 publications

References 32 publications

Application of Diethylenetriaminepenta pentasodium salt as an eco-friendly depressant to effectively improve the flotation separation of scheelite and calcite

Application of Diethylenetriaminepenta pentasodium salt as an eco-friendly depressant to effectively improve the flotation separation of scheelite and calcite

Research Progress with Scheelite Flotation Reagents: A Review

Effective flotation separation of scheelite and calcite by applying methylene phosphonic acid sodium as a novel and green depressant

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