Effect of geological origin of apatite on reverse flotation separation of phosphate ores using phosphoric acid as depressant

Li, Hongqiang; Chen, Yingxin; Zheng, Huifang; Huang, Peng; Yang, Pujia; Chen, Qian; Weng, Xiaoqing; He, Dongsheng; Song, Shaoxian

doi:10.1016/j.mineng.2021.107182

Cited by 24 publications

(4 citation statements)

References 19 publications

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“…Because of the similar hydrophilic nature of the surfaces of apatite and carbonate minerals, 7 significant amounts of calcium metal ions are dissolved in water, 8 while metal active sites of homoplastic nature are exposed 9 . Dissolved metal ions on the surface of carbonate or apatite can be prone to exhibiting cross‐sorption onto minerals during flotation, 10,11 whereas localized anions dissolved in them can also cause intense steric hindrance, 12 making it challenging to effectively separate beneficial minerals from vein minerals due to the surface transformation 13 . Analogously, dolomite and apatite are finally embedded in particle size for calcareous magnesian phosphate ore, and the minerals are prone to non‐selective agglomeration after fine grinding treatment, which causes serious entrapment problems during flotation, making it difficult to meet industrial demand for flotation products 14 .…”

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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“…pH is an important factor that affects the forms of chemicals existing in the solution, then changing the performance of the reagents in response [1,25,26]. Dolomite is prone to being dissolved in acidic environment because of the presence of CO 3 2− .…”

Section: Effect Of Phmentioning

confidence: 99%

“…It is also crucial for China's food supply, which feeds over one billion people. Phosphate rock deposits are an essential raw material for the manufacturing of phosphate fertilizers [1] (Li et al, 2021), therefore they have become a vital mineral resource for food security, and even a role in defining the country's stability [2]. The wet and pyrogenic processes will be utilized to extract phosphoric acid and phosphorus from high-grade phosphate ore, which can then be used to make different phosphate fertilizers and phosphates [3].…”

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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“…Its structure always results from the transformation of existing sedimentary phosphate rocks under different ionic substitutions. Sedimentary phosphates have great industrial importance, since they account for the majority of world phosphorus production [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Sodium N-Lauroylsarcosinate (SNLS) as a Selective Collector for Calcareous Phosphate Beneficiation

et al. 2022

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Sodium N-lauroylsarcosinate (SNLS) was employed as a selective flotation collector for dolomite–apatite separation. The influence of pH, condition time, and collector dose on the flotation performance of both apatite and dolomite minerals was investigated using single mineral and binary mixed mineral flotation experiments. The performance of SNLS was compared to sodium oleate (NaOL), as a standard collector. In this study, the adsorption mechanism of SNLS on both minerals was studied using zeta-potential and FT-IR measurements. The results showed that SNLS prefers to adsorb on the dolomite mineral. The maximum difference in floatability was 83% for single dolomite and apatite minerals at pH 10 in the presence of 0.05 mmol/L SNLS. Binary mixtures of dolomite and apatite minerals of different ratios were applied, to evaluate their separation efficiency. The SNLS could separate dolomite from its mixtures with apatite minerals. Using 0.2 mmol/L of SNLS at pH 10, a concentrate of 30.9% P2O5 and 0.79% MgO was obtained from a natural phosphate ore having 25.8% P2O5 and 5.16% MgO.

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Effect of geological origin of apatite on reverse flotation separation of phosphate ores using phosphoric acid as depressant

Cited by 24 publications

References 19 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

Sodium N-Lauroylsarcosinate (SNLS) as a Selective Collector for Calcareous Phosphate Beneficiation

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