Acid leaching of scheelite concentrates

Authors

  • P. Navarro Departamento de Ingeniería Metalúrgica, Universidad de Santiago de Chile
  • C. Vargas pnavarro@lauca.usach.cl
  • F. J. Alguacil Centro Nacional de Investigaciones Metalúrgicas (CSIC), Ciudad Universitaria

DOI:

https://doi.org/10.3989/revmetalm.2005.v41.i2.193

Keywords:

Leaching, acid, concentrate, tungsten, scheelite

Abstract


The acid leaching in hydrochloric media of a tungsten concentrate (scheelite, CaWO4) was studied. Of the above-mentioned, an insoluble solid (H2WO4) was obtained which were treated with an alkaline solution of sodium hydroxide, achieving the complete solubilization of the tungsten as wolframate ion (WO4-2 ). The transformed fraction of tungsten increases with the temperature, as well as with a finer grain. A maximum dissolution of 88.5 % (400 g/1 HCl, 363 K and 20 µm of particle size) was achieved for a 3 h process, of the disolution process was interpreted by the recessive core model with formation of a layer of solid product for the whole range of variation of the parameters in study. The activation energy value was found to be 28.0 kj/mol

Downloads

Download data is not yet available.

Downloads

Published

2005-04-30

How to Cite

Navarro, P., Vargas, C., & Alguacil, F. J. (2005). Acid leaching of scheelite concentrates. Revista De Metalurgia, 41(2), 111–115. https://doi.org/10.3989/revmetalm.2005.v41.i2.193

Issue

Section

Articles

Most read articles by the same author(s)

<< < 1 2 3 4 5 > >>