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



Related links

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


Revista Facultad de Ingeniería

Print version ISSN 0121-1129


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.

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 )