Flotation separation of chalcopyrite from galena using locust bean gum as a selective and eco-friendly depressant

Miao, Yongchao; Wen, Shuming; Shen, Zhihao; Feng, Qicheng; Zhang, Qian

doi:10.1016/j.seppur.2021.120173

Cited by 29 publications

(3 citation statements)

References 33 publications

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“…In contrast, it showed chemical adsorption on the sphalerite surface via interaction with the oxidation products 25 . It was also documented that LBG showed physisorption on the pyrite and galena surface, while this adsorption was weaker on the chalcopyrite particles 23 , 26 . Surprisingly, the application of LBG as a selective depressant for flotation separation of hematite-quartz has not been reported.…”

Section: Introductionmentioning

confidence: 89%

Green hematite depression for reverse selective flotation separation from quartz by locust bean gum

Kordloo

Khodadadmahmoudi

Ebrahimi

et al. 2023

Sci Rep

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Reverse cationic flotation is currently the main processing technique for upgrading fine hematite from silicates. Flotation is known as an efficient method of mineral enrichment that deals with possibly hazardous chemicals. Thus, using eco-friendly flotation reagents for such a process is an emerging need for sustainable development and green transition. As an innovative approach, this investigation explored the potential of locust bean gum (LBG) as a biodegradable depressant for the selective separation of fine hematite from quartz through reverse cationic flotation. Various flotation conditions (micro and batch flotation) were conducted, and the mechanisms of LBG adsorption have been examined by different analyses (contact angle measurement, surface adsorption, zeta potential measurements, and FT-IR analysis). The micro flotation outcome indicated that the LBG could selectively depress hematite particles with negligible effect on quartz floatability. Flotation of mixed minerals (hematite and quartz mixture in various ratios) indicated that LGB could enhance separation efficiency (hematite recovery > 88%). Outcomes of the surface wettability indicated that even in the presence of the collector (dodecylamine), LBG decreased the hematite work of adhesion and had a slight effect on quartz. The LBG adsorbed selectively by hydrogen bonding on the surface of hematite based on various surface analyses.

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Section: Introductionmentioning

confidence: 89%

Green hematite depression for reverse selective flotation separation from quartz by locust bean gum

Kordloo

Khodadadmahmoudi

Ebrahimi

et al. 2023

Sci Rep

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“…Pb and Zn are widely used in metallurgy, national defense, automotive, and electronics [1,2]. Galena and sphalerite are the main sources of Pb and Zn extracted by these industries and often coexists in nature [3,4].…”

Section: Introductionmentioning

confidence: 99%

Effects of seawater on the adsorption of xanthate onto galena and sphalerite

Song,

Yao,

Yin

2024

J. Phys.: Conf. Ser.

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Seawater contains divalent calcium and magnesium cations. Under alkaline conditions, calcium and magnesium ions react with hydroxide ions to form insoluble hydroxyl complexes or hydroxide precipitates. The hydrophilic substances that may be adsorbed on the mineral surface during the flotation process hinder the adsorption of the collector, affecting mineral hydrophobicity, and thus reducing the floatability of the mineral. In this study, the effects of seawater on the adsorption of xanthate onto galena and sphalerite were investigated. The results show that under strong alkaline conditions, seawater has significant and slight adverse effects on sphalerite and galena, respectively. Flotation regulators such as ethylenediamine tetraacetic acid, sodium hexametaphosphate, and sodium silicate can eliminate the adverse effect on galena and sphalerite flotation to a certain extent. The mechanisms were revealed through microflotation experiments, contact angle measurements, bubble-particle attachment tests, zeta potential measurements, and XPS analysis.

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“…Organic depressants, especially environmentally friendly organic depressants, have been widely arousing researchers’ interests. − Sodium humate (SH) or humate acid, one of the organic depressants, is extracted from natural oxidized lignite or leonardite. It is widely used in agriculture, environment protection, animal feed, healthcare, and so on owing to its environmentally friendly properties and reactive groups such as COO – and OH – groups in the structure, , which is shown in Figure .…”

Section: Introductionmentioning

confidence: 99%

Selective Separation of Chalcopyrite from Pyrite Using Sodium Humate: Flotation Behavior and Adsorption Mechanism

Sun,

Li,

et al. 2023

ACS Omega

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Flotation separation of chalcopyrite from pyrite using lime or cyanides as depressants results in serious problems, such as the blockage of pipelines and environmental pollution. Eco-friendly organics are a future trend for beneficiation plants. In this research, the eco-friendly organic depressant sodium humate (SH) was chosen as a depressant to separate chalcopyrite from pyrite by flotation. The results indicated that SH could selectively depress pyrite owing to the oxidation species (FeOOH, Fe2(SO4)3) on its surface. The oxidation species were the adsorption sites for the COO– in the SH structure and impeded the subsequent collector potassium ethyl xanthate (KEX) adsorption. However, chalcopyrite was slightly oxidized with fewer oxidation species for SH adsorption, and KEX could be adsorbed and functioned effectively. This research suggested that SH could be an effective and eco-friendly depressant in chalcopyrite–pyrite flotation separation, which had potential use in the industry.

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Flotation separation of chalcopyrite from galena using locust bean gum as a selective and eco-friendly depressant

Cited by 29 publications

References 33 publications

Green hematite depression for reverse selective flotation separation from quartz by locust bean gum

Green hematite depression for reverse selective flotation separation from quartz by locust bean gum

Effects of seawater on the adsorption of xanthate onto galena and sphalerite

Selective Separation of Chalcopyrite from Pyrite Using Sodium Humate: Flotation Behavior and Adsorption Mechanism

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