Effect of Fe(II) as assistant depressant on flotation separation of scheelite from calcite

Deng, Rongdong; Yang, Xiaofeng; Hu, Y.; Ku, Jiangang; Zuo, Weiran; Ma, Yingqiang

doi:10.1016/j.mineng.2017.12.017

Cited by 70 publications

(38 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All reagents used in this study are of reagent grade except AF65 (commercial grade). Sodium oleate (Samchun Chemical Co., Ltd., Yeosu, Korea), which is known to be used often in the flotation research on scheelite and Ca-bearing minerals [15,16], and AF65 (Cytec Industries Inc., Woodland Park, NJ, USA) were used as a collector and a frother, respectively. A mixture of ferrous sulfate heptahydrate (FeSO 4 •7H 2 O, Samchun Chemical Co., Ltd., Yeosu, Korea), or oxalic acid (C 2 H 2 O 4 •2H 2 O, Samchun Chemical Co., Ltd., Yeosu, Korea) with sodium silicate (Na 2 SiO 3 , Samchun Chemical Co., Ltd., Yeosu, Korea) was used as a depressant.…”

Section: Methodsmentioning

confidence: 99%

“…However, since scheelite (CaWO 4 ) contains calcium components, it is closely related to other Ca-bearing minerals such as calcite (CaCO 3 ) and fluorite (CaF 2 ). Scheelite has similar physicochemical properties, such as the existence of the same cations (Ca 2+ ) in the mineral, solubility, hardness, specific gravity, and point of zero charge [12,13], which causes similar chemisorption behavior of the fatty acid and a fatty acid derivative as a collector on the Ca-bearing minerals [9,[14][15][16]. Generally, it has been found that sodium silicate is the most widely used depressant for selective flotation of scheelite [15], and assistant depressant such as ferrous sulfate has been investigated [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Although the mechanism of the depression of calcite [15] and fluorite [16] during scheelite flotation, using a mixture of sodium silicate and ferrous sulfate as a depressant, was reported by investigating the minerals with X-ray photoelectron spectroscopy (XPS), more experiments will be required to understand the depression mechanism of sodium silicate and ferrous sulfate. Therefore, in the present study, the optimum flotation condition was obtained from Hallimond-tubes flotation tests, and then the effect of ferrous sulfate addition with sodium silicate was investigated with zeta potential measurement and FT-IR analyses using scheelite, calcite and fluorite conditioned at the optimum condition.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Ferrous Sulfate Addition on the Selective Flotation of Scheelite over Calcite and Fluorite

Jung

Park²,

Yoo

2020

Minerals

View full text Add to dashboard Cite

The addition of ferrous sulfate as a depressant for Ca-bearing minerals such as calcite and fluorite during scheelite flotation was investigated to recover scheelite from tungsten mine tailings, using Hallimond-tube flotation tests, zeta-potential measurement and Fourier-transform infrared (FT-IR) analyses. The flotation tests indicate that the selectivity of scheelite recovery was the largest over calcite and fluorite under the following conditions: 0.5 g sample, 50 g/ton AF65, 1 × 10−3 M sodium oleate, 1200 g/ton SF2 (sodium silicate and ferrous sulfate) depressant with the 8:2 ratio of sodium silicate and ferrous sulfate, 50 mL/min air injection rate, 5 min flotation time, and pH 8. The selectivity of scheelite flotation increased when the amount of SF2 depressant addition increased to 1200 g/ton, but it decreased by adding 1400 g/ton SF2, which would result from the precipitation of iron components. In the zeta potential results, the zeta potentials of scheelite with the collector show similar results regardless of the addition of SF2, while the change of zeta potentials of calcite and fluorite by adding NaO collector diminished when SF2 was added. In FT-IR analyses, the spectrum of NaO in scheelite results was observed regardless of the addition of SF2, while the spectra of NaO in calcite and fluorite results disappeared when SF2 was added. These results suggest that the addition of SF2 prevents the adsorption of NaO on the surface of calcite and fluorite. Therefore, the addition of SF2 could enhance the selectivity of scheelite flotation over calcite and fluorite.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Ferrous Sulfate Addition on the Selective Flotation of Scheelite over Calcite and Fluorite

Jung

Park²,

Yoo

2020

Minerals

View full text Add to dashboard Cite

show abstract

“…Silicic acid binds the calcium cations of the mineral surface; however, the Pb-BHA complexes recognize the oxygen bonds on the mineral surface, and thus, the adsorption of silicic acid (or Al-Na 2 SiO 3 polymer) and Pb-BHA occurs at different sites. This mechanism is very different from traditional fatty acid flotation, where the fatty acid and silicic acid both react with the calcium cations on the mineral surface in a competitive manner [7,9,11,16].…”

Section: Effect Of the Al-na 2 Sio 3 Polymer On The Adsorption Of Pb-mentioning

confidence: 99%

“…The selective adsorption of sodium silicate on minerals is significantly improved by modification with polyvalent metal ions, such as Fe(II), Pb(II), Cu(II), Mg(II), and Al(III) [10,12,[14][15][16], especially for application in scheelite flotation. The Pb-benzohydroxamic acid (BHA) complex, a novel metal-organic collector, has shown specificity toward scheelite, contributing to the flotation separation of scheelite from other calcium minerals [4,17,18].…”

Section: Introductionmentioning

confidence: 99%

Selective Separation of Scheelite from Calcite by Self-Assembly of H2SiO3 Polymer Using Al3+ in Pb-BHA Flotation

Wei

Han

et al. 2019

Minerals

View full text Add to dashboard Cite

The flotation separation of scheelite from calcite is problematic, where sodium silicate modified by polyvalent metal ions has shown some advantages for selective depression. In this study, an Al-Na2SiO3 polymer was used as the depressant for the flotation separation of scheelite from calcite using a lead complex of benzohydroxamic acid (Pb-BHA) as the collector. Furthermore, a number of measurements were conducted to investigate the structure of the Al-Na2SiO3 polymer and its adsorption behavior with Pb-BHA complexes on the mineral surface. Flotation experiments indicated that the Al-Na2SiO3 polymer shows good selectivity for the flotation separation of scheelite from calcite at pH 8, where the optimum ratio of sodium silicate to aluminum sulfate was 2:1. Fourier-Transform Infrared (FTIR) and solution chemical analyses revealed that aluminum hydroxide complexes and the hydroxy moiety of silicic acid are able to self-assemble via condensation affording an Al-Na2SiO3 polymer, i.e., a composite aluminosilicate polymer. The zeta potential measurements and adsorption capacity measurements indicated that, upon adsorption of the Al-Na2SiO3 polymer and Pb-BHA complexes on the mineral surface, the Al-Na2SiO3 polymer had less influence on the adsorption of Pb-BHA complexes on the scheelite surface, while the opposite was true for calcite. Therefore, more Pb-BHA complexes and fewer Al-Na2SiO3 polymers were deposited on the scheelite surface, while fewer Pb-BHA complexes and more Al-Na2SiO3 polymers were adsorbed on the calcite surface. The selective separation of scheelite from calcite was attributed to the cooperative selectivity of the Pb-BHA complexes and Al-Na2SiO3 polymer.

show abstract

The flotation separation of apatite from dolomite using a fatty acid‐based collector and the mechanisms of adsorption

Kang

Zhang

2022

Surface & Interface Analysis

View full text Add to dashboard Cite

In this work, GJBW, a fatty acid‐based agent, was used as an efficient collector to separate dolomite from apatite to achieve high‐purity apatite. The flotation performance of dolomite and apatite in the phosphate (H3PO4) system treated with sodium oleate (NaOl) and GJBW, respectively, was studied and compared. Microheat tests, surface characterization, and flotation solution chemistry calculations were used to evaluate the adsorption mechanism of GJBW onto dolomite. The smoothness and flatness of dolomite treated and untreated with GJBW may be also detected via atomic force microscopy (AFM). Microflotation results illustrated that GJBW performed better than NaOl for separating apatite from dolomite under the H3PO4 system. The grade of P2O5 in concentrates treated with 10 mg/L GJBW was 31.49%, which was 4.98% higher than that of NaOl. The recovery rate of P2O5 was 87.05%, which was 4.71% higher than that of NaOl. Microheat tests demonstrated that GJBW generated a higher heat of adsorption onto dolomite than did the same concentration of NaOl, significantly enhancing the dolomite's hydrophobicity. Fourier transform infrared spectroscopy (FTIR), zeta potential, flotation solution chemistry calculations, and surface characterization further demonstrated that GJBW may ionize large amounts of RCOO− and H (RCOO)2− ions in solution, which can be significantly chemisorbed with numerous sites of Ca and Mg exposed to dolomite, forming dense point‐like adsorption onto dolomite. These findings shed more light on the mechanism of interaction between GJBW and dolomite, which has profound implications for the study and use of fatty acid‐based treatments in phosphate ores.

show abstract

Effect of Fe(II) as assistant depressant on flotation separation of scheelite from calcite

Cited by 70 publications

References 38 publications

Effects of Ferrous Sulfate Addition on the Selective Flotation of Scheelite over Calcite and Fluorite

Effects of Ferrous Sulfate Addition on the Selective Flotation of Scheelite over Calcite and Fluorite

Selective Separation of Scheelite from Calcite by Self-Assembly of H2SiO3 Polymer Using Al3+ in Pb-BHA Flotation

The flotation separation of apatite from dolomite using a fatty acid‐based collector and the mechanisms of adsorption

Contact Info

Product

Resources

About