Liquidus Temperatures of System Na3AlF6-K3AlF6-AlF3 for Aluminum Electrolysis at Lower Temperature |
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| Authors: | WEI Chen-juan LAI Yan-qing LI Jie TIAN Zhong-liang WANG Jia-wei ZOU Zhong and LIU Ye-xiang |
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| Institution: | School of Metallurgical Science and Engineering, Central South University, Changsha 410083, P. R. China |
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| Abstract: | Liquidus temperatures in the molten salt system Na3AlF6-K3AlF6-AlF3 of interest for aluminum electrolysis were determined by thermal analysis method. The results were presented and an empirical equation describing liquidus temperatures for primary crystallization was derived t=1003.5–0.081×A2.3159–5.87×B0.657–0.024×A2.22×B1.14+ 0.035×A2.17×B1.084, where t is the liquidus temperature in degree Celsius, A denotes the mass fraction of AlF3 in system Na3AlF6-K3AlF6- AlF3, and B denotes K3AlF6/(Na3AlF6+K3AlF6 ) in mass(%, the value was defined as KR in this paper). The composition limitations are 0
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| Keywords: | Liquidus temperature Na3AlF6-K3AlF6-AlF3 system Empirical equation |
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