| [Xu Dang,Chen Pengqi,Zhang Jiuxing,Cao Qigao,Chen Kunkun,Zhao Panchao and Cheng Jigui.Investigation of recycling rhenium from different forms of W-Re alloyed scraps[J].Rare Metal Materials and Engineering,2023,52(1):230~237.] |
| Investigation of recycling rhenium from different forms of W-Re alloyed scraps |
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| Received:December 06, 2021 Revised:January 19, 2022 |
| DOI： |
| Key words: W-Re alloyed scraps rhenium recycling pyrometallurgy forms of scraps |
| Foundation item:国家重点研发计划项目(2018YFC1901700，2018YFC1901704) |
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| Abstract: |
| Rhenium is a rare refractory metal with unique characteristics and has been widely used. In the case of insufficient rhenium resources, recycling rhenium from rhenium-bearing scraps is considered to be one of the important ways to obtain rhenium. In this paper, W-Re alloyed scraps in the form of powder, block and wire were selected to recycle rhenium by a pyrometallurgical method, and the properties of the recycled intermediate NH4ReO4 obtained by oxidation roasting, ammonia leaching, evaporative crystallization and the rhenium powder obtained by hydrogen reduction under different process parameters were analyzed. The results show that the form of W-Re alloyed scraps has a significant effect on the recycling process and recovery rate of rhenium powder. The W-Re alloyed scraps in unalloyed powder form, alloyed block and alloyed wire form have different oxidation temperatures, and the volatilization rate of Re2O7 were different at different temperatures. The purity of rhenium powder recycled from three different forms of W-Re alloyed scraps in powder, block and wire were 99.952%, 99.939% and 99.915% respectively, and the recovery rate of rhenium were 95.62%, 94.57% and 91.59% respectively. |
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