Flotation studies of fluorite and barite with sodium petroleum sulfonate and sodium hexametaphosphate

Chen, Zhijie; Ren, Zijie; Gao, Huimin; Zheng, Renji; Jin, Yulin; Niu, Chunge

doi:10.1016/j.jmrt.2018.10.002

Cited by 51 publications

(19 citation statements)

References 16 publications

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“…For this reason, the change of zeta potential due to the adsorption of the collector/depressant may be indicative of the hydrophobicity/flotation response [34]. As shown in Figure 3, the IEP (isoelectric point) of barite is about pH 5.5, which is close to the reported value of 4.7 [7]. The zeta potential of barite decreased around 4-8 mV in the presence of lauryl phosphate when compared to the barite without lauryl phosphate adsorption, which indicates significant adsorption of anionic lauryl phosphate at the barite surface as a function of pH.…”

Section: Zeta Potential Of Barite With Lauryl Phosphatesupporting

confidence: 77%

“…Sodium oleate and pine oil are typically used as collector and frother in barite flotation at pH 10 [5,6]. However, oleate is sensitive to slimes [7], low temperatures [8,9], and hard-water ions [10]. In this regard, many other collectors have been explored in barite flotation.…”

Section: Introductionmentioning

confidence: 99%

“…Barite is either prefloated with cetyl stearyl sodium sulfate or depressed in apatite flotation using fatty acids at pH 12 [11]. Additionally, barite is selectively floated from fluorite using sodium petroleum sulfonate as a collector with sodium hexametaphosphate as a depressant at pH 11 [7]. Furthermore, barite is also a typical invaluable mineral from flotation of Mountain Pass bastnaesite [12].…”

Section: Introductionmentioning

confidence: 99%

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Lauryl Phosphate Flotation Chemistry in Barite Flotation

et al. 2020

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Barite has numerous applications including barium mud for oil well drilling, manufacture of elemental barium, filler for paper and rubber industries, and contrast material for X-ray radiology for the digestive system. Currently, froth flotation is the main method for the beneficiation of barite using fatty acid as a typical collector. In this research, it was found that lauryl phosphate is also a promising collector for barite flotation. Results from microflotation, contact angle, and zeta potential indicate that lauryl phosphate is adsorbed on the barite surface and thus achieves superior flotation efficiency at a wide pH range. The interfacial water structure and wetting characteristics of barite surface with/without lauryl phosphate adsorption were also evaluated by molecular dynamics simulations (MDS). The results from molecular dynamics simulations and interaction energy calculations are in accord with the experimental results, which suggest that lauryl phosphate might be a potential collector for the flotation of barite.

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Section: Zeta Potential Of Barite With Lauryl Phosphatesupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lauryl Phosphate Flotation Chemistry in Barite Flotation

et al. 2020

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“…Hence, such collectors are promising despite the crucial lack of selectivity displayed throughout the flotation tests. Besides, sulfonate collectors, which display a chemical structure very similar to that of sulfate collectors (Figure 7), demonstrated acceptable performances for calcium mineral flotation, including scheelite (Fukazawa, 1977;Gao et al, 2015a) and fluorite (Zheng et al, 2018;Chen et al, 2019). However, as for sulfates, sole sulfonates provided poor selectivity between scheelite and other calcium minerals despite good recoveries (Gao et al, 2015a).…”

Section: Sulfates Phosphates and Their Derivativesmentioning

confidence: 98%

The Challenge of Tungsten Skarn Processing by Froth Flotation: A Review

et al. 2020

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Recently, tungsten has drawn worldwide attention considering its high supply risk and economic importance in the modern society. Skarns represent one of the most important types of tungsten deposits in terms of reserves. They contain fine-grained scheelite (CaWO 4) associated with complex gangue minerals, i.e., minerals that display similar properties, particularly surface properties, compared to scheelite. Consistently, the froth flotation of scheelite still remains, in the twenty first century, a strong scientific, industrial, and technical challenge. Various reagents suitable for scheelite flotation (collectors and depressants, mostly) are reviewed in the present work, with a strong focus on the separation of scheelite from calcium salts, namely, fluorite, apatite, and calcite, which generally represent significant amounts in tungsten skarns. Albeit some reagents allow increasing significantly the selectivity regarding a mineral, most reagents fail in providing a good global selectivity in favor of scheelite. Overall, the greenest, most efficient, and cheapest method for scheelite flotation is to use fatty acids as collectors with sodium silicate as depressant, although this solution suffers from a crucial lack of selectivity regarding the above-mentioned calcium salts. Therefore, the use of reagent combinations, commonly displaying synergistic effects, is highly recommended to achieve a selective flotation of scheelite from the calcium salts as well as from calcium silicates.

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“…It is also widely used in the mineral processing industry, especially in the floatation. SHMP is used as a dispersant and depressant of minerals in flotation [31][32][33][34][35]. In addition, SHMP can be used to depress calcite [24], but it also has a strong depressive effect on scheelite.…”

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confidence: 99%

Use of Sodium Hexametaphosphate and Citric Acid Mixture as Depressant in the Flotation Separation of Scheelite from Calcite

et al. 2019

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The floatability of scheelite and calcite in the presence of single depressant (SHMP or H 3 Cit) and mixed depressant (SHMP/H 3 Cit) was studied by microflotation experiments and artificial mixed mineral experiments. Solution chemical calculation, zeta potential tests, thermodynamic analysis and XPS analysis were used to explain the relevant depressive mechanism. Mixed depressant (SHMP/H 3 Cit) exhibited excellent selective depressive effect on calcite. The optimal molar ratio of SHMP to H 3 Cit was 1:4. The depressant SHMP and H 3 Cit can be chemically bonded with Ca 2+ to form CaHPO 4 and Ca 3 (Cit) 2 at pH 8. The CaHPO 4 was more easily formed than Ca 3 (Cit) 2 on the mineral surface, which indicated that the depressive effect of SHMP was stronger than H 3 Cit. The SHMP and H 3 Cit of the mixed depressant were co-adsorbed on the calcite surface, while the H 3 Cit of the mixed depressant was weakly adsorbed on the scheelite surface. The mixed depressant can significantly improve the separation efficiency of scheelite from calcite. Sodium silicate (water glass) has been widely used as a depressant in flotation of scheelite from calcite [23]. However, sodium silicate also has some disadvantages as a depressant, such as frequent acidification, narrow optimum pH range, and weak selectivity. Single phosphates are also used for calcite depressants, but they are often limited by their weak selectivity, so mixed reagents are often required [24]. Organic macromolecular depressants have also received attention. Zhang et al. studied the role of sodium polyacrylate in flotation separation of scheelite and calcite [25]. However, sodium polyacrylate also has an unfavorable inhibitory effect on scheelite over a wide range of pH conditions, with poor flotation selectivity. Carboxymethyl cellulose has also been studied as a depressant in the flotation separation of scheelite from calcite [26], but it is difficult to dissolve carboxymethyl cellulose at room temperature, which is not conducive to flotation. In view of the shortcomings of the above single depressants, such as poor collecting ability, weak selectivity, and large dosage, it is often necessary to use mixed depressant to achieve flotation separation between scheelite and gangue minerals.Sodium hexametaphosphate (SHMP) is a clean, non-toxic phosphate that is widely used in the food industry and the chemical industry [27,28]. It can be used as a chelating reagent for metal ions, an adhesive, and a swelling reagent [29,30]. It is also widely used in the mineral processing industry, especially in the floatation. SHMP is used as a dispersant and depressant of minerals in flotation [31][32][33][34][35]. In addition, SHMP can be used to depress calcite [24], but it also has a strong depressive effect on scheelite. Citric acid (H 3 Cit) is also a clean, non-toxic organic acid and is a tricarboxylic acid compound. It is mainly used in the food industry, chemical industry, textile industry, cosmetics and pharmaceutical industries [36][37][38]. Citric acid can be used as depress...

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Flotation studies of fluorite and barite with sodium petroleum sulfonate and sodium hexametaphosphate

Cited by 51 publications

References 16 publications

Lauryl Phosphate Flotation Chemistry in Barite Flotation

Lauryl Phosphate Flotation Chemistry in Barite Flotation

The Challenge of Tungsten Skarn Processing by Froth Flotation: A Review

Use of Sodium Hexametaphosphate and Citric Acid Mixture as Depressant in the Flotation Separation of Scheelite from Calcite

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