Beneficiation technology of phosphates: challenges and solutions

El‐Shall, H.; Zhang, P.; Khalek, N. A. Abdel; El-Mofty, S. E.

doi:10.1007/bf03403297

Cited by 15 publications

(11 citation statements)

References 19 publications

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“…Ninguno de estos procesos han mostrado ser económicamente y más eficiente que la flotación convencional para tratar a los minerales de baja ley. En los últimos años se han desarrollado nuevos equipos de flotación, el trabajo altas temperaturas para mejorar la solubilidad del colector o el uso de reactivos de flotación alternativos; una nueva tecnología es el uso de burbujas de aire aceitosas reactiva para procesar los minerales de fosfatos con alto contenido de dolomita, ya que éstas aumentan las propiedades superficiales y producen una mejor concentración de la apatita Liu, et al, (2002); Zhou et al, (2015); El-Shall, et al, (2004).…”

Section: Sis Y Chanderunclassified

Recuperación De Apatita De Relave Producidos en La Concentración Magnética De Hierro

Valderrama

2019

HOLOS

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La apatita es el mineral de fosfato más común, además de ser un recurso no renovable es la única fuente económicamente viable de fósforo para los fertilizantes y productos químicos fosfatados. Chile en el año 2016 produjo 6.205 toneladas de recurso fosfórico y en el mismo año importó 230.738 toneladas. Esto hace necesario estudiar tecnología para concentrar los minerales de fosfato presentes en los relaves de hierro, promoviendo la diversificación productiva y disminuyendo los volúmenes de pasivos ambientales. Se analizó la efectividad de un colector en un relave generado de la concentración magnética de hierro, el cual contiene cuarzo, óxidos de hierro, feldespato, carbonatos y anfíboles. Estos minerales de fosfatos fueron concentrados por flotación, usando oleato de sodio y un reactivo sintético como colector. Este trabajo presenta los resultados obtenidos con el colector de la AkzoNobel, llamado Atrac 2600 y muestra que bajo condiciones de flotación de 500 g/t de colector, 400 g/t de Na2SiO3 como dispersor de ganga, se alcanza una ley de 20,1% de P2O5 con una recuperación de 88,4%. Estos resultados obtenidos al ser comparados con los de oleato de sodio presentan mejores resultados metalúrgicos; lo permitiría retratar los grandes volúmenes de relave de hierro, lo que se traducirá en una minería más sustentable.

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Section: Sis Y Chanderunclassified

Recuperación De Apatita De Relave Producidos en La Concentración Magnética De Hierro

Valderrama

2019

HOLOS

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“…In this practice, phosphate minerals can be separated from the associated gangue minerals (silicates, carbonates, etc.) using either direct flotation process (phosphates are floated) or reverse flotation process (gangues are floated) (Al-Thyabat et al, 2011;El-Shall et al, 2004;Peleka et al, 2006). The best method is selected based on the mineral composition of the ore (El-Shall et al, 2004;Yehia et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…using either direct flotation process (phosphates are floated) or reverse flotation process (gangues are floated) (Al-Thyabat et al, 2011;El-Shall et al, 2004;Peleka et al, 2006). The best method is selected based on the mineral composition of the ore (El-Shall et al, 2004;Yehia et al, 1990). In general, the grade of phosphates in the ore and flotation concentrates is expressed in terms of phosphorus pentoxide (P2O5), the major precursor to produce phosphoric acid-based fertilizers.…”

Section: Introductionmentioning

confidence: 99%

Optimization of flotation efficiency of phosphate minerals in mine tailings using polymeric depressants: Experiments and machine learning

Alsafasfeh¹,

Alagha²,

Alzidaneen³

et al. 2022

Physicochem. Probl. Miner. Process.

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In this study, direct froth flotation experiments were conducted on silicate-rich phosphate tailing samples. The average grade of P2O5 in the flotation feed was 21.6% as determined using a combination of spectroscopic techniques including X-ray powder diffraction (XRD), mineral liberation analysis (MLA), and scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS). Two polymers were selected to promote the depression of silicates and enhance the flotation of phosphates: in-house synthesized hybrid polyacrylamide (Hy-PAM) and chitosan. Flotation efficiency of phosphates was evaluated at different flotation conditions including depressant type, depressant dosage, pH, and the flotation time. Results indicated that the optimum flotation efficiency of phosphate minerals (84.6% recovery at 28.6% grade of P2O5) was obtained when Hy-PAM was utilized at the studied range of pH and flotation time. All datasets produced from the flotation experiments were integrated within the framework of machine learning (ML) using artificial neural networks (ANNs). The ANN platform was trained, validated, and successfully employed to predict the process outcomes in relation to the pulp and reagents characteristics, which in turn were used to determine the optimum values of process variables. Coefficient of determination (R 2 ), mean absolute error (MAE), and rootmean-square error (RMSE) were used as model indicators. Optimization results showed that the peak flotation performance could be achieved at higher dosages of both polymers. However, lower pH and shorter flotation time for Hy-PAM, and higher pH and longer flotation time for chitosan, were predicted to give the optimum process efficiency.

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“…The solubility of the phosphate associated impurities, especially that contains calcium ions, represents the bottle‐neck of the phosphate flotation. Therefore, several research works were devoted to improve the flotation selectivity by focusing on chemical reagents used in flotation ( i.e ., depressants, pH modifiers and collectors) . In the most cases, depressants play various roles in terms of depressing the valuable mineral as well as forming complex compounds with soluble ions in the solution.…”

Section: Introductionmentioning

confidence: 99%

Rice starch as a depressant in phosphate reverse flotation

2015

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Depressants are essential additives, to increase the separation selectivity, in the reverse flotation of phosphate by fatty acid collectors. In the current study, the rice starch is used, as a phosphate depressant, in the reverse flotation of calcareous phosphate by oleic acid. The operating parameters affecting the starch depressing action such as: collector dosage, pH and starch dosage are studied using statistical design of experiments. The design analysis showed that the starch dose has the most significant effect on the concentrate grade. A concentrate containing 30.6% P 2 O 5 with a recovery of 91.6% was achieved at the optimum values of studied parameters, i.e., 4, 4 kg/t, and 4 kg/t for pH, starch dosage, and collector dosage, respectively. The FTIR analysis was used to characterize the interaction between the collector and starch as well as the starch and phosphate ore. It was found that the oleicore interaction was chemical, whereas the starch interaction with either phosphate or oleic acid was physical.

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Beneficiation technology of phosphates: challenges and solutions

Cited by 15 publications

References 19 publications

Recuperación De Apatita De Relave Producidos en La Concentración Magnética De Hierro

Recuperación De Apatita De Relave Producidos en La Concentración Magnética De Hierro

Optimization of flotation efficiency of phosphate minerals in mine tailings using polymeric depressants: Experiments and machine learning

Rice starch as a depressant in phosphate reverse flotation

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