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| Roasting Desulphurization and Digestion Performance of High Sulfur-bearing Bauxite with Coarse Particle Size |
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Received:January 27, 2015
Revised:February 01, 2015
Accepted:February 03, 2015
Published Online:June 23, 2015
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| DOI：doi：10.3969/j.issn.1007-7545.2015.07.010 |
| KeyWord:high sulfur-bearing bauxite; particle size; roasting; digestion performance |
| Author | Institution |
| zhaocong |
贵州大学 材料与冶金学 |
| chenchaoyi |
贵州大学 材料与冶金学 |
| lijunqi |
贵州大学 材料与冶金学 |
| zhangman |
贵州大学 材料与冶金学 |
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| Abstract: |
| Roasting desulfurization and digestion performance of high sulfur-bearing bauxite of millstone-milling (particle size of 75% -830 μm) and ball-milling (particle size of 85% -75 μm) were investigated comparatively with raw ore. The results show that sulfur content of millstone-milling and ball-milling drops from 2.33% to 0.68% and 0.64% respectively after roasted at 700 ℃ for 30 min, which meets the requirement of alumina production. Al2O3 digestion rate of roasted sample can be improved by 3~4.5 percentage under the optimum digestion conditions including caustic alkali concentration of 245 g/L, digestion temperature of 260 ℃, lime dosage of 8%, and digestion time of 60 min. |
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