PURIFICATION OF FELDSPAR FROM IRON OXIDE IMPURITIES USING NITRIC ACID IN PRESENCE OF AMMONIUM BIUORIDE

Authors

  • R. akkal Laboratoire de G_enie Minier, _ Ecole Nationale Polytechnique, Departement de Génie Minier, 10 Avenue Hassen Badi BP 182 el harrach Alger
  • M. Khodja Sonatrach/Division Technologies et Innovation, Avenue du 1er Novembre, 35000 Boumerdès

DOI:

https://doi.org/10.4314/jfas.v12i1S.10

Keywords:

Leaching; magnetic separation; Flotation; nitric acid; ammonium bifluoride.

Abstract

The main objective of this study is focused on the mechanical preparation of Algerian crude feldspar with a view to extract the information about the comminution and the coloring iron rate distribution, on the one hand, and to remove the iron oxides, on the other hand, main impurities of crude feldspar by magnetic separation, flotation and more particularly by chemical leaching. In this process, the nitric acid and dithionite as reducing agent are used to replace sulfuric acid whose the application tests have yielded negative results. Research results shows that using a nitric acid in a reducing medium as ammonium bifluoride (HF,NH4F) process is effective and pushes the degree of iron oxides (Fe2O3) removal around 0.01\%. The hydro-metallurgical process applied especially to size fractions [-0.8 + 0.1] mm intended for the glass industry previously undergo a high intensity magnetic field reduces iron levels up to 0.054 \% with a yields in terms of weight of 58.32\% compared to those of all comers.

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Published

2019-12-16

How to Cite

AKKAL, R.; KHODJA, M. PURIFICATION OF FELDSPAR FROM IRON OXIDE IMPURITIES USING NITRIC ACID IN PRESENCE OF AMMONIUM BIUORIDE. Journal of Fundamental and Applied Sciences, [S. l.], v. 12, n. 1S, p. 118–140, 2019. DOI: 10.4314/jfas.v12i1S.10. Disponível em: https://www.jfas.info/index.php/JFAS/article/view/651. Acesso em: 25 feb. 2024.