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| Research on Flash Roasting – Alkali Dissolving Desilication of Low Grade High-sulfur Bauxite |
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Received:February 03, 2018
Revised:February 06, 2018
Accepted:February 08, 2018
Published Online:June 15, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.07.004 |
| KeyWord:flash roasting; high-sulfur bauxite; desilication |
| Author | Institution |
| XieZHenSHan |
贵州大学 |
| Li JunQi |
贵州大学 |
| Chen CHaoYi |
贵州大学 |
| Lan YuanPei |
贵州大学 |
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| Abstract: |
| "Flash-roasting - alkali dissolving desilication" method was applied to treat low-grade high-sulfur bauxite. Effects of flash roasting temperature, L/S, alkali concentration, desilication temperature, and desilication time on removal rate of SiO2 and loss rate of Al2O3 were investigated. The results show that removal rate of SiO2 is 46% above, loss rate of Al2O3 is 3% below, and A/S ratio rises from 4.3 in roasted ore to 8.4 in aluminum concentrate under the optimum conditions including flash roasting temperature of 1 000 ℃, L/S=10︰1, alkali concentration of NK=110 g/L, desilication temperature of 95 ℃, and desilication time of 20 min. This process can be applied to Bayer dissolution production. |
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