Selective flotation of scheelite from calcite using xanthan gum as depressant

Dong, Liuyang; Jiao, Fen; Qin, Wenqing; Liu, Wei

doi:10.1016/j.mineng.2019.04.030

Cited by 101 publications

(21 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For dolomite in Fig. 9(b), the fitting peak of Ca 2p of bare dolomite contained a doublepeak at 347.06 eV and 350.66 eV, the peak derived from Ca 2p3/2 and Ca 2p1/2 in dolomite (Dong, 2019). After dolomite reacted to CBC, the fitting peaks had moved to 347.24 eV and 350.84 eV, respectively, with an increase of 0.18 eV.…”

Section: Xps Analysismentioning

confidence: 91%

Effect of N-carboxybutyl chitosan on the flotation separation of apatite from dolomite

Rao¹,

Liu²,

Gao³

et al. 2021

Physicochem. Probl. Miner. Process.

View full text Add to dashboard Cite

With high-grade apatite resources exhausted and economic development, enhancing the apatite quality from calcium gangue such as dolomite has a great significance for production. However, it is difficult to separate apatite from dolomite effectively due to the similar surface properties. In this study, the N-carboxybutyl chitosan (CBC) was tested as a potential selective depressant to separate apatite from dolomite in the sodium oleate (NaOL). Flotation results of single mineral and artificially mixed mineral confirmed the selective depression effect of CBC. The depression mechanism of CBC was investigated using wettability analysis, Fourier Transform Infrared (FTIR), and X-ray Photoelectron Spectroscopy (XPS) analyses. The results indicated that the CBC adsorption quantity and intensity on the dolomite surface more than that on the apatite surface, which was due to CBC absorbed on apatite surface by hydrogen bonding, while absorbed on dolomite surface mainly through chemical chelating between Ca on the mineral surface and -COOon the depressant. These adsorption differences led to the flotation separation of the two minerals.

show abstract

Section: Xps Analysismentioning

confidence: 91%

Effect of N-carboxybutyl chitosan on the flotation separation of apatite from dolomite

Rao¹,

Liu²,

Gao³

et al. 2021

Physicochem. Probl. Miner. Process.

View full text Add to dashboard Cite

show abstract

“…In flotation processes, flotation separation (FS) between minerals is usually achieved by adding different flotation reagents that change the wettability of mineral surfaces and thus separate the minerals [9,12]. The flotation process of scheelite uses inhibitors such as sodium silicate (water glass), modified water glass, carboxymethyl cellulose, phosphoric acid, and phosphate [7,[13][14][15]. The hydrophilicity of the vein mineral surface is enhanced by the interaction of functional groups in the inhibitors with Ca 2+ on their surfaces through adsorption or generation of new hydrophilic sites [8], achieving the inhibition effect.…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Manganese Ion Addition Points on the Separation of Scheelite and Calcite by Sodium Silicate

Guan

Lu²,

Zhang

et al. 2022

Materials

View full text Add to dashboard Cite

The flotation separation (FS) of both scheelite and calcite minerals with similar physicochemical properties remains challenging, since the Ca active sites exist on their surfaces. The present work investigated the effects of different addition points of MnCl2 on the FS of scheelite and calcite by micro-flotation tests, zeta potential measurements, UV-Vis spectrophotometer measurements, infrared spectrum analysis, and X-ray photoelectron spectroscopy (XPS) tests, and the mechanism of separation is elucidated. Interestingly, the recovery of scheelite was 91.33% and that of calcite was 8.49% when MnCl2 was added after sodium silicate. Compared with the addition of MnCl2 before Na2SiO3, the recovery of scheelite was 64.94% and that of calcite was 6.64%. The sequence of adding MnCl2 followed by Na2SiO3 leads to the non-selective adsorption of Mn2+ on the surface of scheelite and calcite firstly, and later, sodium silicate will interact with it to produce hydrophilic silicate. This substantially enhances the hydrophilicity on the surface of both minerals, making separation impossible. In contrast, the addition of MnCl2 after sodium silicate can promote the formation of a metal silicate and enhance the selectivity and inhibition effect on calcite. Meanwhile, under this dosing sequence, the adsorption of Mn2+ on the scheelite surface offered more active sites for sodium oleate, which improved the scheelite surface hydrophobicity. This leads to a great improvement of the FS effect of scheelite and calcite.

show abstract

“…Recently, organic depressants have become the focus of research because of their variety and large number of sources. Some organic depressants, such as tannin, calcium lignosulfonate, sodium alginate, carboxymethyl cellulose, and pectin, have been used as a calcite depressant in scheelite or fluorite flotation when sodium oleate was used as the collector [21][22][23][24][25][26][27][28]. However, the majority of the research on organic depressants remains confined to the laboratory and has not been applied in practice, which can be attributed to the fact that organic depressants have certain drawbacks, including high cost, poor solubility, and their non-biodegradable or polluting nature [29].…”

Section: Introductionmentioning

confidence: 99%

A Highly Selective Reagent Scheme for Scheelite Flotation: Polyaspartic Acid and Pb–BHA Complexes

Wei

Han

et al. 2020

Minerals

View full text Add to dashboard Cite

Previous studies have proved that the lead complexes of benzohydroxamic acid (Pb–BHA) are effective collectors of scheelite flotations; however, the separation of scheelite from calcite needs depressants with high selectivity. In this study, we reported a novel depressant for calcite minerals, and Pb–BHA served as the collector of scheelite. The flotation behavior of polyaspartic acid (PASP) in a scheelite and calcite flotation that uses Pb–BHA was determined via flotation experiments. Furthermore, the selective adsorption of PASP on the mineral surfaces and the effect of PASP on the adsorption of Pb–BHA on the mineral surfaces were investigated through zeta potential measurements, X-ray photoelectron spectroscopy (XPS), crystal chemistry calculations, and Fourier transform infrared spectroscopy (FTIR) measurements. Thus, PASP demonstrated high selectivity in both scheelite and calcite and contributed to the successful separation of scheelite from calcite. PASP exhibited a higher adsorption capacity and stronger chemisorption with the active sites of calcium atoms on the calcite surface. The crystal chemistry calculations indicated that the distance of the PASP functional groups matched with the calcium distance of a calcite mineral surface, which can be attributed to the selectivity of PASP. Furthermore, the adsorption of PASP impeded the adsorption of Pb–BHA on the calcite surfaces, whereas the opposite was the case for scheelite. The mutually reinforcing selectivity of PASP and Pb–BHA considerably contributes to the efficient flotation separation of scheelite from calcite.

show abstract

Selective flotation of scheelite from calcite using xanthan gum as depressant

Cited by 101 publications

References 46 publications

Effect of N-carboxybutyl chitosan on the flotation separation of apatite from dolomite

Effect of N-carboxybutyl chitosan on the flotation separation of apatite from dolomite

Study of the Effect of Manganese Ion Addition Points on the Separation of Scheelite and Calcite by Sodium Silicate

A Highly Selective Reagent Scheme for Scheelite Flotation: Polyaspartic Acid and Pb–BHA Complexes

Contact Info

Product

Resources

About