The role of impregnants in determining the behaviour of graphite anodes |
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| Authors: | M. A. Rabah A. A. Abdul Azim A. Ismail |
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| Affiliation: | (1) Central Metallurgical Research and Development Institute, National Research Centre, Dokki, Cairo, Egypt |
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| Abstract: | The lifetime of graphite anodes in sulphuric acid media can be increased by a factor of 3.2 by multiple impregnation with coal tar pitch. For single impregnation, linseed oil yielded the largest improvement. The results were interpreted on the premise that properties such as viscosity, melting point and coking value determine the effectiveness of the impregnant. The proper selection of the impregnant and procedure of impregnation is dependent on the electrolysis temperature. |
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