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| Study on Purification of Superalloy Scrap Lixivium by Two-stage Precipitation |
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Received:November 26, 2014
Revised:November 28, 2014
Accepted:December 01, 2014
Published Online:May 20, 2015
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| DOI：doi：10.3969/j.issn.1007-7545.2015.06.004 |
| KeyWord:superalloy scrap; purification; chromium; aluminum |
| Author | Institution |
| Guo rui |
西北有色金属研究院 |
| WANG jing-kun |
西北有色金属研究院 |
| WANG zhi-jun |
西北有色金属研究院 |
| Ma guang |
西北有色金属研究院 |
| Li jin |
西北有色金属研究院 |
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| Abstract: |
| Two-stage precipitation process was applied to purify leaching solution of superalloy scrap. In the first stage, removal rate of impurities of Cr and Al are all 90% above with mass concentration of 15% Na3PO4 as precipitation agent under the conditions including pH value of end point of 2.5, temperature of 70 ℃, and reaction time of 2 h. In the second stage, removal rate of impurities of Cr and Al are all 99% above with mass concentration of 15% NaOH as precipitation agent under the conditions including pH value of end point of 5.5, temperature of 70 ℃, and reaction time of 2 h. The purified solution can be directly used to separate Ni and Co. The expanding test results show that this process has better industrial application prospect. |
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