Effects of Sodium Citrate on the Ammonium Sulfate Recycled Leaching of Low-Grade Zinc Oxide Ores
The effects of sodium citrate on ammonium sulfate recycled leaching of low-grade zinc oxide ores were studied. By applying various kinds of detection and analysis techniques such as chemical composition analysis, chemical phase method, scanning electron microscopy and energy dispersive spectrum (SEM...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2016-03-01
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| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2014-0215 |
| _version_ | 1818720450328395776 |
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| author | Yang Kun Li Shi-wei Zhang Li-bo Peng Jin-hui Ma Ai-yuan Wang Bao-bao |
| author_facet | Yang Kun Li Shi-wei Zhang Li-bo Peng Jin-hui Ma Ai-yuan Wang Bao-bao |
| author_sort | Yang Kun |
| collection | DOAJ |
| description | The effects of sodium citrate on ammonium sulfate recycled leaching of low-grade zinc oxide ores were studied. By applying various kinds of detection and analysis techniques such as chemical composition analysis, chemical phase method, scanning electron microscopy and energy dispersive spectrum (SEM/EDS), X-ray diffraction (XRD) and Fourier-transforming infrared spectrum (FT-IR), zinc raw ore, its leaching slag and the functional mechanism of sodium citrate were investigated. Based on a comprehensive analysis, it can be concluded that in contrast to hemimorphite (Zn4Si2O7(OH)2 · H2O), amorphous smithsonite (ZnCO3) and zinc silicate (Zn2SiO4) prove to be refractory phases under ammonium sulfate leaching, while sodium citrate has a better chelating action with the refractory phases, resulting in a higher zinc leaching rate. Under conditions of [NH3]/[NH3]T molar ratio being 0.5, [NH3]T being 7.5 mol/L, [Na3C6H5O7] being 0.2 mol/L, S/L ratio being 1:5, temperature being 303 K, holding time being 1 h in each of the two stages, and stirring rate being 300 rpm, the leaching rate of zinc reached 93.4%. In this article, sulfate ammonium recycled technology also reveals its unique advantage in processing low-grade zinc oxide ores accompanied by high silicon and high alkaline gangue. |
| first_indexed | 2024-12-17T20:23:02Z |
| format | Article |
| id | doaj.art-32ec1cb751124abbb02ffc65a5dc2656 |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-17T20:23:02Z |
| publishDate | 2016-03-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-32ec1cb751124abbb02ffc65a5dc26562022-12-21T21:33:52ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242016-03-0135327528110.1515/htmp-2014-0215Effects of Sodium Citrate on the Ammonium Sulfate Recycled Leaching of Low-Grade Zinc Oxide OresYang KunLi Shi-weiZhang Li-boPeng Jin-huiMa Ai-yuanWang Bao-baoThe effects of sodium citrate on ammonium sulfate recycled leaching of low-grade zinc oxide ores were studied. By applying various kinds of detection and analysis techniques such as chemical composition analysis, chemical phase method, scanning electron microscopy and energy dispersive spectrum (SEM/EDS), X-ray diffraction (XRD) and Fourier-transforming infrared spectrum (FT-IR), zinc raw ore, its leaching slag and the functional mechanism of sodium citrate were investigated. Based on a comprehensive analysis, it can be concluded that in contrast to hemimorphite (Zn4Si2O7(OH)2 · H2O), amorphous smithsonite (ZnCO3) and zinc silicate (Zn2SiO4) prove to be refractory phases under ammonium sulfate leaching, while sodium citrate has a better chelating action with the refractory phases, resulting in a higher zinc leaching rate. Under conditions of [NH3]/[NH3]T molar ratio being 0.5, [NH3]T being 7.5 mol/L, [Na3C6H5O7] being 0.2 mol/L, S/L ratio being 1:5, temperature being 303 K, holding time being 1 h in each of the two stages, and stirring rate being 300 rpm, the leaching rate of zinc reached 93.4%. In this article, sulfate ammonium recycled technology also reveals its unique advantage in processing low-grade zinc oxide ores accompanied by high silicon and high alkaline gangue.https://doi.org/10.1515/htmp-2014-0215sodium citratelow-grade zinc oxide oresammonium sulfaterecycled leaching81.40.wx |
| spellingShingle | Yang Kun Li Shi-wei Zhang Li-bo Peng Jin-hui Ma Ai-yuan Wang Bao-bao Effects of Sodium Citrate on the Ammonium Sulfate Recycled Leaching of Low-Grade Zinc Oxide Ores High Temperature Materials and Processes sodium citrate low-grade zinc oxide ores ammonium sulfate recycled leaching 81.40.wx |
| title | Effects of Sodium Citrate on the Ammonium Sulfate Recycled Leaching of Low-Grade Zinc Oxide Ores |
| title_full | Effects of Sodium Citrate on the Ammonium Sulfate Recycled Leaching of Low-Grade Zinc Oxide Ores |
| title_fullStr | Effects of Sodium Citrate on the Ammonium Sulfate Recycled Leaching of Low-Grade Zinc Oxide Ores |
| title_full_unstemmed | Effects of Sodium Citrate on the Ammonium Sulfate Recycled Leaching of Low-Grade Zinc Oxide Ores |
| title_short | Effects of Sodium Citrate on the Ammonium Sulfate Recycled Leaching of Low-Grade Zinc Oxide Ores |
| title_sort | effects of sodium citrate on the ammonium sulfate recycled leaching of low grade zinc oxide ores |
| topic | sodium citrate low-grade zinc oxide ores ammonium sulfate recycled leaching 81.40.wx |
| url | https://doi.org/10.1515/htmp-2014-0215 |
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