Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C
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...
| Main Authors: | , , , |
|---|---|
| Format: | Online |
| Language: | eng |
| Published: |
Universidad Pedagógica y Tecnológica de Colombia
2017
|
| Subjects: | |
| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6053 |
| _version_ | 1801706077831561216 |
|---|---|
| author | Longa-Avello, Lisbeth Pereyra-Zerpa, Cristina Casal-Ramos, Julio Andrés Delvasto, Pedro |
| author_facet | Longa-Avello, Lisbeth Pereyra-Zerpa, Cristina Casal-Ramos, Julio Andrés Delvasto, Pedro |
| author_sort | Longa-Avello, Lisbeth |
| collection | OJS |
| description | 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. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-6053 |
| institution | Revista Facultad de Ingeniería |
| language | eng |
| publishDate | 2017 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-60532022-06-15T16:17:46Z Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C Estudio del proceso de calcinación en dos minerales de hierro limoníticos entre 250 °C y 950 °C Longa-Avello, Lisbeth Pereyra-Zerpa, Cristina Casal-Ramos, Julio Andrés Delvasto, Pedro Iron Ore Limonite Thermal Modification of Minerals Limonita Mineral de hierro Modificación térmica de minerales 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. Se estudió el proceso de deshidratación de dos minerales limoníticos de Venezuela entre 250 °C y 950 °C, usando termogravimetría, espectroscopia infrarroja y difracción de rayos x. Para ambos materiales, estas técnicas indicaron que la transformación de goethita a hematita ocurrió en el rango de 250 °C a 350 °C. Adicionalmente, la difracción de rayos X mostró un rearreglo estructural dentro del yacimiento mineral a una temperatura por encima de 350 °C; a temperaturas mayores, solo se reconoce la estructura de la hematita. Finalmente, la espectroscopia infrarroja reveló que la transformación de goethita a hematita implica la pérdida de grupos funcionales de OH- estructural característicos de la limonita. Universidad Pedagógica y Tecnológica de Colombia 2017-05-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion investigation investigación application/pdf application/xml https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6053 10.19053/01211129.v26.n45.2017.6053 Revista Facultad de Ingeniería; Vol. 26 No. 45 (2017); 33-45 Revista Facultad de Ingeniería; Vol. 26 Núm. 45 (2017); 33-45 2357-5328 0121-1129 eng https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6053/5584 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6053/6405 |
| spellingShingle | Iron Ore Limonite Thermal Modification of Minerals Limonita Mineral de hierro Modificación térmica de minerales Longa-Avello, Lisbeth Pereyra-Zerpa, Cristina Casal-Ramos, Julio Andrés Delvasto, Pedro Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C |
| title | Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C |
| title_alt | Estudio del proceso de calcinación en dos minerales de hierro limoníticos entre 250 °C y 950 °C |
| title_full | Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C |
| title_fullStr | Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C |
| title_full_unstemmed | Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C |
| title_short | Study of the calcination process of two limonitic iron ores between 250 °C and 950 °C |
| title_sort | study of the calcination process of two limonitic iron ores between 250 °c and 950 °c |
| topic | Iron Ore Limonite Thermal Modification of Minerals Limonita Mineral de hierro Modificación térmica de minerales |
| topic_facet | Iron Ore Limonite Thermal Modification of Minerals Limonita Mineral de hierro Modificación térmica de minerales |
| url | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6053 |
| work_keys_str_mv | AT longaavellolisbeth studyofthecalcinationprocessoftwolimoniticironoresbetween250cand950c AT pereyrazerpacristina studyofthecalcinationprocessoftwolimoniticironoresbetween250cand950c AT casalramosjulioandres studyofthecalcinationprocessoftwolimoniticironoresbetween250cand950c AT delvastopedro studyofthecalcinationprocessoftwolimoniticironoresbetween250cand950c AT longaavellolisbeth estudiodelprocesodecalcinacionendosmineralesdehierrolimoniticosentre250cy950c AT pereyrazerpacristina estudiodelprocesodecalcinacionendosmineralesdehierrolimoniticosentre250cy950c AT casalramosjulioandres estudiodelprocesodecalcinacionendosmineralesdehierrolimoniticosentre250cy950c AT delvastopedro estudiodelprocesodecalcinacionendosmineralesdehierrolimoniticosentre250cy950c |
