Alkaline metal fluoride synthesis as a subproduct of β-spodumene leaching

Rosales, Gustavo D.; Ruiz, Manuel; Rodríguez, M. H.

doi:10.1016/j.hydromet.2013.07.008

Cited by 26 publications

(29 citation statements)

References 10 publications

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“…In accordance with the bibliography, (Rosales et al 2013(Rosales et al , 2014, we found that the dissolution reaction of metakaolin in HF occurs as follows:…”

Section: Leaching Experimentssupporting

confidence: 81%

“…They proposed the recovery of these compounds by increasing the pH of the solution with Na 2 CO 3 . Both compounds are the most common and widely used alkali fluorides in industry (Rosales et al, 2013).…”

Section: Metalurgia E Materiaismentioning

confidence: 99%

“…Cryolite (Na 3 AlF 6 ) is mainly used as a flux in the production process of metallic aluminum; other minor applications are as enamel bleaches, glass opacifier and insecticide's active agent (Rosales et al, 2013).…”

Section: Metalurgia E Materiaismentioning

confidence: 99%

“…Al 2 O 3 2SiO 2(s) + 24HF (aq) ⎯→ 2H 3 AlF 6(aq) + 2H 2 SiF 6(aq) + 7H 2 O The dissolution efficiency (Rosales et al 2013(Rosales et al , 2014 was calculated by using Equation (3):…”

Section: Leaching Experimentsmentioning

confidence: 99%

“…3 b), an augmentation in the temperature increases the dissolution of the mineral; these experiments agree with the known fact that the heterogeneous reaction between a mineral and a fluid reactant, either an acid or a base, is generally slow and sensitive to temperature. In addition the increase of the temperature increases the reactivity of the solid and the solubility of the formed products (Habashi, 1980and Quiroga et al, 1996, Rosales et al, 2013, Rodriguez et al, 2015.…”

Section: Effect Of Reaction Temperaturementioning

confidence: 99%

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Hydrometallurgical extraction of Al and Si from kaolinitic clays

et al. 2017

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Herein is presented the results of a study on the hydrometallurgic extraction and recovery of aluminum and silicon by leaching of kaolinitic clays with HF. The studied extraction parameters were: temperature, reaction time, solid/liquid ratio, concentration, and precipitating agent mass. In the leaching process, mineral dissolutions near 100% were obtained when working at 348 K, solid/liquid ratio 2% w/v, HF 12% v/v, for 120 minutes. The HF leach liquor generated from the dissolution of kaolinitic clays contains H 2 SiF 6 and H 3 AlF 6 . Studies were conducted to recover the two valuable fluorides as K 2 SiF 6 and Na 3 AlF 6 by precipitation with alkaline salts from the leach liquor. Phases of precipitated fluorides were identified by XRD and surface morphology by SEM. The purity of the K 2 SiF 6 precipitate was 98.8%, whereas for Na 3 AlF 6 , it was 89.3%. Also, both synthesized solids are of high commercial value due to their industrial applications.

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“…In accordance with the bibliography, (Rosales et al 2013(Rosales et al , 2014, we found that the dissolution reaction of metakaolin in HF occurs as follows:…”

Section: Leaching Experimentssupporting

confidence: 81%

Section: Metalurgia E Materiaismentioning

confidence: 99%

Section: Metalurgia E Materiaismentioning

confidence: 99%

“…Al 2 O 3 2SiO 2(s) + 24HF (aq) ⎯→ 2H 3 AlF 6(aq) + 2H 2 SiF 6(aq) + 7H 2 O The dissolution efficiency (Rosales et al 2013(Rosales et al , 2014 was calculated by using Equation (3):…”

Section: Leaching Experimentsmentioning

confidence: 99%

Section: Effect Of Reaction Temperaturementioning

confidence: 99%

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