Selective flotation separation of apatite from dolomite utilizing a novel eco-friendly and efficient depressant for sustainable manufacturing of phosphate fertilizer

Yang, Bin; Cao, Shun‐an; Zhu, Zhanglei; Yin, Wanzhong; Sheng, Qiuyue; Sun, Haoran; Yao, Jin; Chen, Keqiang

doi:10.1016/j.jclepro.2020.124949

Cited by 44 publications

(11 citation statements)

References 39 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%

“…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 Consequently, the development and utilization of new flotation agents, combinations of agents, and so forth have become crucial.…”

Section: Introductionmentioning

confidence: 99%

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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%

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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“…As a result, a new depressant has been developed that is both effective and safe for the environment. Acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer [P (AA-AMPS)] has a strong interaction with magnesium ions on the dolomite surface, which reduces the NaOL adsorption on the dolomite surface, while the NaOL can still be significantly adsorbed on the apatite surface [15]. Furthermore, all previous studies revealed that [P (AA-AMPS)] is a critical part in the selective adsorption of dolomite rather than apatite and, thus, a strong dolomite depressant.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it is considered an eco-friendly and strong depressant for dolomite. Due to its limited ability to aggregate and low separation efficiency [15,16], in recent years, many studies have been conducted to improve the separation efficiency of apatite from carbonate minerals; and it has been reported that sodium dodecyl benzene sulfonate (SDBS) has a significant collector impact on apatite flotation, but has no effect on dolomite adsorption characteristics. SDBS was discovered to interact with Ca active sites on the apatite surface through chemical bonding.…”

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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“…China is rich in phosphate rock resources, but it is characterized by its less rich ore. Most of them are medium and low-grade collophanite (Yang et al, 2021). Collophanite and gangue mineral dolomite are highly symbiotic and are difficult to separate due to their similar physical, chemical properties and mineral composition on the mineral surface (Liu et al, 2017b).…”

Section: Introductionmentioning

confidence: 99%

Influence of measuring process properties on phosphate rock slurry rheology based on Brookfield method

Chen¹,

Zhang²

2022

Physicochem. Probl. Miner. Process.

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This research aims to explore how the flotation process conditions influence the rheological properties of phosphate rock slurry. The apparent viscosity of phosphate rock slurry was measured by Brookfield DVNext rheometer. Different mineral types, grinding time, slurry mass concentration and reagent systems were adopted to study the viscosity behavior of phosphate rock slurry. The results showed that under the same conditions, the apparent viscosity of apatite and dolomite slurry was basically the same, and the apparent viscosity of the slurry after mixing the two minerals was basically the same as that of single mineral. For the same slurry concentration, the mineral particle size had a significant effect on the rheological behavior of the slurry, and its apparent viscosity increased exponentially with the decrease of particle size. In addition, phosphate rock slurry showed shear thickening fluids characteristics when the slurry concentration is 20%-40%, but changed to pseudoplastic fluid at high concentration (60%). Sulfuric acid as pH regulator and inhibitor had little effect on the rheology of slurry; when GJBW and NaOL were added as collectors, the rheology of slurry changed, and the effect of GJBW was more obvious.

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Selective flotation separation of apatite from dolomite utilizing a novel eco-friendly and efficient depressant for sustainable manufacturing of phosphate fertilizer

Cited by 44 publications

References 39 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

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

Influence of measuring process properties on phosphate rock slurry rheology based on Brookfield method

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