The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (Fe<sub>X</sub>Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> System
The zinc in the fayalite slag of copper smelters, in which Zn-containing raw materials are used, is mainly found to be in oxidic phases, such as glassy iron silicate. During the slag water granulation process, the molten slag is heated, whereby the granulated slag achieves varying granulation temper...
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| Format: | Article |
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MDPI AG
2022-06-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/12/6/767 |
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| author | Jakob Kero Andertun Pasi Peltola Fredrik Engström Caisa Samuelsson |
| author_facet | Jakob Kero Andertun Pasi Peltola Fredrik Engström Caisa Samuelsson |
| author_sort | Jakob Kero Andertun |
| collection | DOAJ |
| description | The zinc in the fayalite slag of copper smelters, in which Zn-containing raw materials are used, is mainly found to be in oxidic phases, such as glassy iron silicate. During the slag water granulation process, the molten slag is heated, whereby the granulated slag achieves varying granulation temperatures. Therefore, in this study, we aimed to characterize and assess the leaching behavior of a synthesized Fe-saturated (Fe<sub>X</sub>,Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> system to understand the dependance of the zinc leaching behavior on the parameters of the ZnO content (1–10 wt.%) and granulation temperature (1300 or 1400 °C). It was found that the Zn leaching increased with the increasing Zn content and granulation temperature, using both batch and static pH leaching methods. Zn leaching was further increased at pH 5 using diluted nitric acid under oxidation conditions. Among the oxides in the samples—fayalite, spinel, and glass—glass was found to contribute to Zn leaching, owing to its weathering during pH-titration. |
| first_indexed | 2024-03-09T22:57:47Z |
| format | Article |
| id | doaj.art-17a50f46061e49d59c39f5314678b519 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T22:57:47Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-17a50f46061e49d59c39f5314678b5192023-11-23T18:07:30ZengMDPI AGMinerals2075-163X2022-06-0112676710.3390/min12060767The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (Fe<sub>X</sub>Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> SystemJakob Kero Andertun0Pasi Peltola1Fredrik Engström2Caisa Samuelsson3Division of Minerals and Metallurgical Engineering, Luleå University of Technology, 971 87 Luleå, SwedenBoliden Mineral AB, Boliden Rönnskär, 932 81 Skelleftehamn, SwedenDivision of Minerals and Metallurgical Engineering, Luleå University of Technology, 971 87 Luleå, SwedenDivision of Minerals and Metallurgical Engineering, Luleå University of Technology, 971 87 Luleå, SwedenThe zinc in the fayalite slag of copper smelters, in which Zn-containing raw materials are used, is mainly found to be in oxidic phases, such as glassy iron silicate. During the slag water granulation process, the molten slag is heated, whereby the granulated slag achieves varying granulation temperatures. Therefore, in this study, we aimed to characterize and assess the leaching behavior of a synthesized Fe-saturated (Fe<sub>X</sub>,Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> system to understand the dependance of the zinc leaching behavior on the parameters of the ZnO content (1–10 wt.%) and granulation temperature (1300 or 1400 °C). It was found that the Zn leaching increased with the increasing Zn content and granulation temperature, using both batch and static pH leaching methods. Zn leaching was further increased at pH 5 using diluted nitric acid under oxidation conditions. Among the oxides in the samples—fayalite, spinel, and glass—glass was found to contribute to Zn leaching, owing to its weathering during pH-titration.https://www.mdpi.com/2075-163X/12/6/767leachinggranulated fayalite slagzinc iron silicateslag propertiescrystal structure |
| spellingShingle | Jakob Kero Andertun Pasi Peltola Fredrik Engström Caisa Samuelsson The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (Fe<sub>X</sub>Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> System Minerals leaching granulated fayalite slag zinc iron silicate slag properties crystal structure |
| title | The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (Fe<sub>X</sub>Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> System |
| title_full | The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (Fe<sub>X</sub>Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> System |
| title_fullStr | The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (Fe<sub>X</sub>Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> System |
| title_full_unstemmed | The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (Fe<sub>X</sub>Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> System |
| title_short | The Effect of Zn Content and Granulation Temperature on Zn Leaching in an Fe-Saturated (Fe<sub>X</sub>Zn<sub>(1−X)</sub>)<sub>2</sub>SiO<sub>4</sub> System |
| title_sort | effect of zn content and granulation temperature on zn leaching in an fe saturated fe sub x sub zn sub 1 x sub sub 2 sub sio sub 4 sub system |
| topic | leaching granulated fayalite slag zinc iron silicate slag properties crystal structure |
| url | https://www.mdpi.com/2075-163X/12/6/767 |
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