A new enrichment method of medium–low grade phosphate ore with high silicon content

Wang, Bo; Xu, Dehua; Wu, Junhu; Yang, Xiushan; Zhang, Zhiye; Yan, Zhengjuan

doi:10.1016/j.mineng.2022.107548

Cited by 13 publications

(6 citation statements)

References 29 publications

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“…The exo-gangue is made up of three types of constituents: carbonates where there is a predominance of dolomite ((Mg0.93, Ca1.07)•(CO 3 ) 2 ), sulphates with traces of epsomite (MgSO 4 •7H 2 O) and silicates, represented by free silica, such as quartz, opal or amorphous silica, feldspar, heulandite, glauconite and illite [26][27][28]. It should be noted that the phosphated material, in addition to the endo-gangue, represents 5.3 % of it, which is made up of a carbonated fluorapatite.…”

Section: Methodsmentioning

confidence: 99%

Study of the feasibility of valorizing phosphate ore by electrostatic separation

Derrardjia,

Nettour,

Chettibi

et al. 2024

TAPR

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The object of this research is the phosphate serves, as a fundamental and crucial raw material with diverse applications, primarily utilized in producing phosphoric acid and fertilizers. However, dolomitic impurities within the ore can greatly impede its effectiveness. Therefore, it is essential to minimize these impurities to the lowest feasible levels to mitigate their adverse effects. This ensures optimal performance and quality in various industries reliant on phosphate, promoting efficiency and sustainability in the production process. Through a comprehensive assessment, it becomes feasible to gauge the enrichment potential and propose viable methods to realize it. Among these methods, flotation stands out as one of the most effective for enhancing phosphate ore, despite its inherent drawbacks of costliness and environmental impact stemming from chemical reagents. This study endeavors to investigate the feasibility of employing electrostatic separation as an alternative method for enriching phosphate ore sourced from the Tebessa region in Algeria. Such exploration aims to offer insights into potentially more sustainable and economically viable approaches to ore enrichment in the region of Bir Elater Wilaya of Tebessa. Tests were carried out using different types of electrostatic separators at the Angouleme site of the PPRIME Institute: a multifunctional metal-belt-type separator, a free-fall plate-electrodes-type separator and an electrostatic separator with coaxial wire – cylinder electrode system. The experimental findings demonstrate significant promise, indicating that electrostatic separation enhanced the P2O5 content from 25 % to 29 % in an untreated phosphate ore sample. Simultaneously, it efficiently eliminated 82.80 % of MgO, achieving a P2O5 recovery rate more than 80 % and a yield of 70 %. Consequently, employing this method proves effective in reducing the MgO content of the ore to below than 1 %, aligning with industrial standards for commercial phosphate products. This underscores the viability of electrostatic separation as a viable and efficient technique in phosphate ore processing, offering substantial improvements in both quality and yield.

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Section: Methodsmentioning

confidence: 99%

Study of the feasibility of valorizing phosphate ore by electrostatic separation

Derrardjia,

Nettour,

Chettibi

et al. 2024

TAPR

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“…27,[55][56][57] Each region excluding the peaks of solvent and internal standard was integrated and normalized to the total spectral area using MNova 14.2.3 (Mestrelab Research) to obtain the relative region area percentages, which correspond to the functionalities distribution. The integration results were validated by comparing the elemental content of hydrochar estimated based on the total spectral peak area (see eqn (5)) with that was directly measured following the procedures in subsection 2.2. Moreover, the validation was performed by comparing the NMR-based and experimental-based (%Z contributed , see eqn ( 6)) values for percent contribution of P, Mg, and Ca by the detected minerals toward the total content of these elements in the hydrochar.…”

Section: Quantitative Xrd Analysismentioning

confidence: 99%

“…4 In addition, HTL produces a solid carbonaceous coproduct called hydrochar with relatively similar carbon and energy content to brown coal (lignite) and comparable nutrient content to low-grade phosphate rock. 5 Hydrochar formation is considered disadvantageous from HTL operational perspective since it can adsorb 55-80% of the total biocrude oil produced, 2,6 leading to a requirement of ltration followed by extraction using non-polar organic solvent to recover the biocrude. Because the addition of these two processes increases the HTL operational cost, efforts have been made to suppress hydrochar formation during HTL.…”

Section: Introductionmentioning

confidence: 99%

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Probing elemental speciation in hydrochar produced from hydrothermal liquefaction of anaerobic digestates using quantitative X-ray diffraction

Sudibyo

Tester

2022

Sustainable Energy Fuels

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“…The selective enrichment of Fap from phosphorite was the key to obtaining high content of phosphorus and REEs. Flotation pre‐enrichment and strong acid leaching were traditional methods used to treat phosphorite 14–20 . Under acidic conditions, the difference in floatability between Fap and Dolo increased 21 .…”

Section: Introductionmentioning

confidence: 99%

Selective removal of dolomite from rare earth element‐bearing phosphorite by flotation and leaching and the adsorption mechanism of agents on mineral surfaces

Xie

2023

Surface & Interface Analysis

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The rare earth elements (REEs)‐bearing phosphorite was a potential REE resource, which contained all REEs except polonium, among them lanthanide, cerium, neodymium, and yttrium were especially enriched. REEs mainly occurred in fluorapatite (Fap) and had a high positive correlation with phosphorus content. By adopting a new green environmental fatty acid collector GJBW and through one roughing and one refining reverse flotation process, all REEs were pre‐enriched. The flotation concentrate was further leached with citric acid (CA), and all REEs were further enriched. The results of X‐ray diffractometer (XRD), Fourier transform infrared spectroscopy (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) showed that dolomite (Dolo) was removed and Fap was enriched in phosphorite, the selective enrichment of phosphorus and REEs was realized. Density functional theory (DFT) calculation revealed the mechanism of deep purification of REEs and phosphorus in phosphorite by CA at the micro‐scale. The results showed that the number and strength of bonding between CA and Dolo (104) surface were greater than that between CA and Fap (001) surface, and CA was more easily adsorbed on Dolo (104) surface. Under the same conditions, Dolo in phosphorite was more easily leached by CA, while Fap was further enriched. This process provided a theoretical basis for the comprehensive recovery of REEs and phosphorus from phosphorite.

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A new enrichment method of medium–low grade phosphate ore with high silicon content

Cited by 13 publications

References 29 publications

Study of the feasibility of valorizing phosphate ore by electrostatic separation

Study of the feasibility of valorizing phosphate ore by electrostatic separation

Probing elemental speciation in hydrochar produced from hydrothermal liquefaction of anaerobic digestates using quantitative X-ray diffraction

Selective removal of dolomite from rare earth element‐bearing phosphorite by flotation and leaching and the adsorption mechanism of agents on mineral surfaces

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