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| Separation of Aluminum and Iron Minerals in High-iron Bauxite by Starch Hydrothermal Method |
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Received:October 22, 2018
Revised:October 24, 2018
Accepted:October 26, 2018
Published Online:January 24, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.02.007 |
| KeyWord:high-iron bauxite; hematite; starch; dissolution; reduction |
| Author | Institution |
| HE Yong-fei |
辽宁科技大学 材料与冶金学院 |
| WANG Yi-yong |
辽宁科技大学 材料与冶金学院 |
| WAN Xing-yuan |
辽宁科技大学 材料与冶金学院 |
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| Abstract: |
| Aluminum-iron minerals in high-iron bauxite were separated by high-pressure hydrothermal reduction applying degradation products of starch in alkalinity system as reductant. The results show that aluminum dissolution rate and iron reduction rate is as high as 88.2% and 92.3% respectively under the conditions of temperature of 280 ℃ and NaOH concentration of 180 g/L. Average particle size of product is about 2.6 μm. Under the condition of ensuring complete dissolution of aluminum, temperature is the main factor to control reduction of iron oxide, while NaOH concentration has little effect. |
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