Industrial electric heating furnaces – Arc furnace device – Electrode
Patent
1985-12-17
1987-12-29
Bell, Janyce A.
Industrial electric heating furnaces
Arc furnace device
Electrode
427 34, 427 78, 427294, 427299, 428336, 428688, H05B 7094, B05D 102, B05D 512
Patent
active
047165723
ABSTRACT:
Coating graphite and carbon bodies with a protective layer containing predominantly silicon, by plasma spraying a silicon powder with a grain size under 0.05 mm and with an argon/hydrogen mixture as the plasma gas at reduced atmospheric pressure of at most 200 h Ps. The layer thickness is 0.1 to 0.5 mm and has a density which is at least 95% of the theoretical density. The coated bodies, for instance, graphite electrodes have a lower burnoff rate than unprotected ones in an oxidizing or corrosive atmosphere.
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Grosewald et al., "Deposition of Silicon and Other Materials on Cathodes by Flame Spraying" in IBM Technical Bulletin, vol. 22, No. 5, Oct. 1979.
Kuhn Heinrich
Stitz Olaf
Wimmer Karl
Bell Janyce A.
Greenberg Laurence A.
Lerner Herbert L.
SIGRI GmbH
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