Geopolymerization of low-grade bauxite
2014
Аутори
Nikolić, IrenaJanković-Častvan, Ivona
Krivokapić, Jasmina
Đurović, Dijana
Radmilović, Vuk
Radmilović, Velimir R.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
In terms of quality, bauxite ore can be classified as high- or low-grade ore. High-grade bauxite ores are used for alumina extraction using the Bayer process, while low-grade bauxite ores have a limited application. In this paper we investigate the possibility of evaluating low-grade bauxite ores with the geopolymerization process. The influence of the synthesis parameters, i.e., alkali and silicate dosages and alkali cations (Na+ and K+) on the compressive strength of bauxite-based geopolymers is evaluated. The results show that an increase in the alkali dosage has a beneficial effect on the strength of bauxite-based geopolymers, while the strengthening of geopolymers by increasing the silicate dosage is limited by the viscosity of the geopolymer paste. Moreover, Na-geopolymers reach higher values of the compressive strength than K-geopolymers.
Кључне речи:
geopolymerization / low-grade bauxite / alkali-cation geopolymerization degree / compressive strengthИзвор:
Materiali in Tehnologije, 2014, 48, 1, 39-44Издавач:
- Institute of Metals and Technology
Финансирање / пројекти:
- Ministry of Science of Montenegro [01-460]
- U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]
- Развој, карактеризација и примена наноструктуираних композитних катализатора и интерактивних носача у горивним спреговима и електролизи воде (RS-MESTD-Basic Research (BR or ON)-172054)
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Nikolić, Irena AU - Janković-Častvan, Ivona AU - Krivokapić, Jasmina AU - Đurović, Dijana AU - Radmilović, Vuk AU - Radmilović, Velimir R. PY - 2014 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2570 AB - In terms of quality, bauxite ore can be classified as high- or low-grade ore. High-grade bauxite ores are used for alumina extraction using the Bayer process, while low-grade bauxite ores have a limited application. In this paper we investigate the possibility of evaluating low-grade bauxite ores with the geopolymerization process. The influence of the synthesis parameters, i.e., alkali and silicate dosages and alkali cations (Na+ and K+) on the compressive strength of bauxite-based geopolymers is evaluated. The results show that an increase in the alkali dosage has a beneficial effect on the strength of bauxite-based geopolymers, while the strengthening of geopolymers by increasing the silicate dosage is limited by the viscosity of the geopolymer paste. Moreover, Na-geopolymers reach higher values of the compressive strength than K-geopolymers. PB - Institute of Metals and Technology T2 - Materiali in Tehnologije T1 - Geopolymerization of low-grade bauxite EP - 44 IS - 1 SP - 39 VL - 48 UR - https://hdl.handle.net/21.15107/rcub_technorep_2570 ER -
@article{ author = "Nikolić, Irena and Janković-Častvan, Ivona and Krivokapić, Jasmina and Đurović, Dijana and Radmilović, Vuk and Radmilović, Velimir R.", year = "2014", abstract = "In terms of quality, bauxite ore can be classified as high- or low-grade ore. High-grade bauxite ores are used for alumina extraction using the Bayer process, while low-grade bauxite ores have a limited application. In this paper we investigate the possibility of evaluating low-grade bauxite ores with the geopolymerization process. The influence of the synthesis parameters, i.e., alkali and silicate dosages and alkali cations (Na+ and K+) on the compressive strength of bauxite-based geopolymers is evaluated. The results show that an increase in the alkali dosage has a beneficial effect on the strength of bauxite-based geopolymers, while the strengthening of geopolymers by increasing the silicate dosage is limited by the viscosity of the geopolymer paste. Moreover, Na-geopolymers reach higher values of the compressive strength than K-geopolymers.", publisher = "Institute of Metals and Technology", journal = "Materiali in Tehnologije", title = "Geopolymerization of low-grade bauxite", pages = "44-39", number = "1", volume = "48", url = "https://hdl.handle.net/21.15107/rcub_technorep_2570" }
Nikolić, I., Janković-Častvan, I., Krivokapić, J., Đurović, D., Radmilović, V.,& Radmilović, V. R.. (2014). Geopolymerization of low-grade bauxite. in Materiali in Tehnologije Institute of Metals and Technology., 48(1), 39-44. https://hdl.handle.net/21.15107/rcub_technorep_2570
Nikolić I, Janković-Častvan I, Krivokapić J, Đurović D, Radmilović V, Radmilović VR. Geopolymerization of low-grade bauxite. in Materiali in Tehnologije. 2014;48(1):39-44. https://hdl.handle.net/21.15107/rcub_technorep_2570 .
Nikolić, Irena, Janković-Častvan, Ivona, Krivokapić, Jasmina, Đurović, Dijana, Radmilović, Vuk, Radmilović, Velimir R., "Geopolymerization of low-grade bauxite" in Materiali in Tehnologije, 48, no. 1 (2014):39-44, https://hdl.handle.net/21.15107/rcub_technorep_2570 .