INTEQUI   20941
INSTITUTO DE INVESTIGACIONES EN TECNOLOGIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Gold extraction by chlorination using a pyrometallurgical process
Autor/es:
M. OJEDA , E. PERINO, M. DEL C. RUIZ
Revista:
MINERALS ENGINEERING
Editorial:
Elsevier
Referencias:
Año: 2009 vol. 22 p. 409 - 411
ISSN:
0892-6875
Resumen:
The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using
chlorine as a reactive agent, has been studied. The influence of temperature and reaction time was studied
through changes in the reactant solid. The techniques used to characterize the mineral samples and
the reaction residues were stereomicroscopy, X-ray diffraction, X-ray fluorescence and scanning electronic
microscopy. Results indicate that gold extraction is favored by increasing, both, the temperature
and the reaction time. The best recovery values were of 98.23% at 873 K and 3600 s and of 98.73% at
873 K and 5400 s, with very low attack of the matrix containing the metal. The powder of pure gold
was not chlorinated at this temperature level.