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| Study on Removal of Sodium Oxalate by Lime Causticizing Method |
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Received:September 01, 2016
Revised:September 21, 2016
Accepted:September 22, 2016
Published Online:December 21, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2017.01.009 |
| KeyWord:lime; sodium oxalate; causticizing efficiency |
| Author | Institution |
| FANG Hui |
龙口东海氧化铝有限公司 |
| SONG Yu-lai |
辽宁科技大学材料与冶金学院 |
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| Abstract: |
| Effects of alkali concentration, temperature, time, and molecular ratio on causticizing efficiency of lime causticizing method were investigated. The optimum conditions of causticizing process were determined. The results shows that causticizing efficiency drops with increase of alkali concentration, rises firstly and then drops with increase of temperature, rises with increase of reaction time and tends to stable, and rises with increase of molecular ratio. Causticizing efficiency is 81% under the conditions including alkali concentration of 16 g/L, temperature of 60 ℃, time of 60 min, and molar ratio of 2.5. Industrial practice shows that simple with low investment and low cost caustification, this process can efficiently remove sodium oxalate and reduce loss of alumina. |
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