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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Pedagógica y Tecnológica de Colombia
2017
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=413954888003 https://www.redalyc.org/journal/4139/413954888003/ https://www.redalyc.org/journal/4139/413954888003/html/ https://www.redalyc.org/journal/4139/413954888003/413954888003.epub https://www.redalyc.org/journal/4139/413954888003/movil |
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Sommario:
- Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C Lisbeth Longa-Avello Cristina Pereyra-Zerpa Julio Andrés Casal-Ramos Pedro Delvasto Ingeniería Iron Ore Limonite Thermal Modification of Minerals 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. 2017 artículo científico 0121-1129 https://www.redalyc.org/articulo.oa?id=413954888003 https://www.redalyc.org/journal/4139/413954888003/ https://www.redalyc.org/journal/4139/413954888003/html/ https://www.redalyc.org/journal/4139/413954888003/413954888003.epub https://www.redalyc.org/journal/4139/413954888003/movil 10.19053/01211129.v26.n45.2017.6053 en http://www.redalyc.org/revista.oa?id=4139 Facultad de Ingeniería application/pdf Universidad Pedagógica y Tecnológica de Colombia Facultad de Ingeniería (Colombia) Num.45 Vol.26