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| Study on Desulfurization of Low Grade and High Sulfur Bauxite by Low-Temperature Roasting |
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Received:December 18, 2020
Revised:December 25, 2020
Accepted:December 29, 2020
Published Online:May 20, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.06.005 |
| KeyWord:low grade; high sulfur; roasting; bauxite |
| Author | Institution |
| MA Xing-fei |
商丘工学院 机械工程学院 河南 商丘 |
| ZHANG Qiang |
商丘工学院 机械工程学院 河南 商丘 |
| ZHANG Shan-shan |
商丘工学院 机械工程学院 河南 商丘 |
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| Abstract: |
| To address digestion of low grade and high sulfur bauxite in industrial application, effects of roasting temperature, roasting time and ore particle size on desulfurization by low-temperature roasting were investigated. The results show that sulfur removal rate of bauxite is 75.83% with sulfur content in ore of 0.29% under the optimum roasting desulfurization conditions including roasting temperature of 650 ℃, roasting time of 180 s, and ore particle size of 48 μm. Under the same digestion conditions, relative dissolution rate of alumina from roasted ore is 97.63%, which is 7.32 percent point higher than that of raw ore. Sulfur in bauxite mainly exists in form of pyrite, which is prior reaction with kaolinite to boehmite during roasting. |
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