Selective adsorption of an eco-friendly and efficient depressant PBTCA onto dolomite for effective flotation of fluorapatite from dolomite

Yang, Bin; Zhu, Zhanglei; Yin, Wanzhong; Sun, Qianqian; Sun, Haoran; Han, Hua; Sheng, Qiuyue; Yao, Jin

doi:10.1016/j.cej.2020.125780

Cited by 80 publications

(18 citation statements)

References 72 publications

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“…In recent years, some new flotation collectors have been studied, such as α‐bromoauric acid, 20 oleic acid amide, 21 n ‐hexadecanoyl glycine, 12 and new surfactants 22 . Although these agents can effectively improve the index of flotation concentrations, they have the disadvantage of being complex and costly to synthesize and have not been used in practical applications so far 23 . On the contrary, despite the poor selectivity and low solubility of traditional fatty acid‐based collectors, there are outstanding advantages such as strong trapping capacity, easy access, and low price, which are still the main components of fatty acids and their complexes in current research and practice for the reverse flotation of phosphate ore 24 .…”

Section: Introductionmentioning

confidence: 99%

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

Kang

Zhang

2022

Surface & Interface Analysis

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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.

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Section: Introductionmentioning

confidence: 99%

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

Kang

Zhang

2022

Surface & Interface Analysis

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“…apatite is commonly linked with gangue minerals such as quartz, iron oxides, clays, and calcareous minerals in phosphate ores because it is one of the most important phosphorus-bearing minerals (e.g., dolomite and calcite) [5,6]. In the mineral processing, dolomite as a low-value mineral is usually removed from valuable minerals, such as apatite [7], magnesite [8], and rare earth minerals (e.g., monazite and bastnasite) [9]. However, due to their comparable physicochemical properties, successful separation of apatite and dolomite remains a major difficulty.…”

Section: Introductionmentioning

confidence: 99%

Flotation Separation of Dolomite from Fluorapatite Using Sodium Dodecyl Benzene Sulfonate as the Efficient Collector under Low Temperature

et al. 2022

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Flotation is the most often employed process to achieve the selective removal of contaminants from the raw materials used in the manufacturing of phosphate fertilizer. However, sodium oleate (NaOL), as a typical collector, is ineffective because of its low collecting ability under low temperature. As a result, developing and implementing feasible alternatives is critical for the long-term output of mines. In this study, sodium dodecyl benzene sulfonate (SDBS), a low-cost and freely soluble reagent under low temperature was used to examine its collecting ability and selectivity in a fluorapatite-dolomite system by means of single and artificially mixed minerals flotation. The adsorption mechanism was evaluated with the help of XPS analyses. The flotation results demonstrate that SDBS could float both fluorapatite and dolomite, but show a higher affinity towards fluorapatite instead of dolomite. Moreover, SDBS could preferred adsorb onto fluorapatite surface when fluorapatite and dolomite coexist. SDBS is more suitable than NaOL for satisfactory recovery of fluorapatite under low temperature in terms of the higher recovery obtained. The XPS analyses results demonstrate that the adsorption of SDBS on fluorapatite surface was more intensively as opposed to that on dolomite surface and Ca active sites on fluorapatite surface are supposed to be the main location for SDBS attachment.

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“…2-Phosphonate-butane-1,2,4-tricarboxylic acid (PBTCA) is a five-component organic acid, belonging to a series of ultra-low phosphorus water quality stabilizers. It has unique corrosion and scale inhibition performance, is non-toxic and pollution-free, and is widely used in the treatment of circulating cooling water. − In addition, it is often used as an inhibitor, a scale inhibitor, a dispersant, and a modifier. − …”

Section: Introductionmentioning

confidence: 99%

Study on NO Removal Characteristics of the Fe(II)EDTA and Fe(II)PBTCA Composite System

Wang

et al. 2022

ACS Omega

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Fe 2+ complexation wet denitrification technology has become a research hotspot. It is very important to achieve efficient regeneration of the absorbent and increase NO absorption in the Fe 2+ complexation system. They are the key to the industrial application of the Fe 2+ complexation absorption process. In this paper, 2-phosphonate-butane-1,2,4-tricarboxylic acid and ethylenediamine tetraacetic acid were used as ligands to prepare a composite system for the first time. The characteristics of NO removal were investigated under different temperatures, pHs, Fe 2+ concentrations, O 2 contents, NO concentrations, CO 2 contents, and SO 2 concentrations. Compared with the single ligand, the results show that the denitrification performance of the solution with a complex ligand is significantly improved. In this system, pH 9, 40 °C temperature, and 20 mmol/L Fe 2+ concentration are the economic ideal conditions for NO removal. The system can realize simultaneous removal of NO and SO 2 , but SO 2 in flue gas has a dual effect on the NO removal reaction.

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Selective adsorption of an eco-friendly and efficient depressant PBTCA onto dolomite for effective flotation of fluorapatite from dolomite

Cited by 80 publications

References 72 publications

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

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

Flotation Separation of Dolomite from Fluorapatite Using Sodium Dodecyl Benzene Sulfonate as the Efficient Collector under Low Temperature

Study on NO Removal Characteristics of the Fe(II)EDTA and Fe(II)PBTCA Composite System

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