Floatability of apatites and gangue minerals of an igneous phosphate ore

Barros, Luiz Antonio Fonseca de; Ferreira, Eliomar Evaristo; Peres, Antônio Eduardo Clark

doi:10.1016/j.mineng.2008.04.012

Cited by 32 publications

(16 citation statements)

References 2 publications

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“…It has been well established that NaOL is a powerful collector for oxidized ore, such as apatite [37], dolomite [41], fluorite [42], pyrochlore [43], malachite [22], and so on. When it adsorbed on apatite and dolomite surfaces, it changed the hydrophilic mineral surface to hydrophobic [2,44]. However, when the concentration of NaOL exceeded the critical micelle concentration (CMC), the mineral surface became hydrophilic again due to the double-layer adsorption of NaOL molecules on mineral surfaces [37,45].…”

Section: Effect Of Surface Roughness On Contact Angle Of Apatite and mentioning

confidence: 99%

Insight into the Influence of Surface Roughness on the Wettability of Apatite and Dolomite

Wang

Zhang

2020

Minerals

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Surface roughness has an important influence on the wettability of particles. This paper is an innovative exploration to control the surface wettability of apatite and dolomite from the perspective of roughness in the background of phosphate flotation. Roughness characteristics of apatite and dolomite particles and its effects on wettability were investigated with surface roughness, contact angle measurements, and SEM analysis. The relationship between surface energy and wettability of different roughness surfaces was also discussed. The results indicated that the influence of roughness on apatite and dolomite particles showed the same regularity, and wettability increased with the increasing roughness for hydrophilic surfaces, while the wettability decreased for hydrophobic surfaces. The influence of roughness on wettability can be well explained by Wenzel and Cassie models, and the surface energy of different rough surfaces had a strong correlation with their wettability. When sodium oleate was added after acid treatment, the apatite was hydrophilic, while the dolomite was hydrophobic; the difference in wettability between them became greater as surface roughness increased. Thus, it can be predicted that the selective separation of dolomite and apatite under acid reverse flotation conditions can be strengthened by increasing the mineral surface roughness during comminution.

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Section: Effect Of Surface Roughness On Contact Angle Of Apatite and mentioning

confidence: 99%

Insight into the Influence of Surface Roughness on the Wettability of Apatite and Dolomite

Wang

Zhang

2020

Minerals

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“…Observations by Abeidu, 1974 andChehreh Chelgani et al, 2012, that indicate pyrochlore grains with high Fe content appear to be less recoverable, can possibly be related to preferential surface oxidation of the Fe rich pyrochlore rendering the surface unsuitable for collector attachment. Previous investigations have also suggested that a higher proportion of Fe possibly decreases the negative surface charge on grains, potentially preventing the adsorption of the cationic amine collectors (Barros et al, 2008;Chehreh Chelgani et al, 2012).…”

Section: Discussionmentioning

confidence: 98%

Study of pyrochlore surface chemistry effects on collector adsorption by TOF-SIMS

Chelgani

Hart

Marois

et al. 2012

Minerals Engineering

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“…Varias investigaciones han sido realizadas en relación a la caracterización, ángulo de contacto, potencial zeta, micro flotabilidad y flotación a nivel de laboratorio con apatitas, los cuales han mostrado que la presencia de sustituciones de hierro, titanio y silicio en la estructura cristalina y el grado de impregnación de la apatita reducen su flotabilidad y la selectividad, por lo que sus propiedades superficiales varían mucho de un mineral a otro, por lo cual existen diferentes respuestas a la flotación (Brandão y Rodrigues 1993;Guimarães et al, 2005;Barros et al 2008). 2003, realizaron una revisión de la flotación de los minerales de fosfato, en función de los colectores, depresores, reactivos auxiliares y mezclas utilizadas comúnmente en la flotación de estos minerales.…”

Section: Introductionunclassified

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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Floatability of apatites and gangue minerals of an igneous phosphate ore

Cited by 32 publications

References 2 publications

Insight into the Influence of Surface Roughness on the Wettability of Apatite and Dolomite

Insight into the Influence of Surface Roughness on the Wettability of Apatite and Dolomite

Study of pyrochlore surface chemistry effects on collector adsorption by TOF-SIMS

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

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