SciELO - Scientific Electronic Library Online

 
vol.26 issue45DeSoftln: A methodological proposal for individual software developmentImplementation of ATEX standards in the context of mining activity in Colombia author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Revista Facultad de Ingeniería

Print version ISSN 0121-1129

Abstract

LONGA-AVELLO, Lisbeth; PEREYRA-ZERPA, Cristina; CASAL-RAMOS, Julio Andrés  and  DELVASTO, Pedro. Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C. Rev. Fac. ing. [online]. 2017, vol.26, n.45, pp.33-45. ISSN 0121-1129.  https://doi.org/10.19053/01211129.v26.n45.2017.6053.

The dehydration process of two limonitic ores from Venezuela was studied between 250 °C and 950 °C by means of thermogravimetry, infrared spectroscopy, and x-ray diffraction. These techniques indicated for both minerals that the goethite-to-hematite transformation occurred in the range of 250-350 °C. In addition, the x-ray diffraction showed a structural re-arrangement within the orebody above 350 °C, temperature above which only the hematite structure is recognizable. Finally, infrared spectroscopy revealed that such transformation implies the loss of structural OH- functional groups, characteristic of the limonite.

Keywords : Iron Ore; Limonite; Thermal Modification of Minerals.

        · abstract in Spanish | Portuguese     · text in English     · English ( pdf )