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Progress in Plasma Processing of Materials, 2001

ISBN:
1-56700-165-3 (Print)

HEAT TRANSFER IN TRIPLE TORCH PLASMA PROCESSING REACTORS WITH SOLUTION INJECTION

A. V. Gorbunov
Plasma Physics and Chemistry Laboratory, A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, Minsk, Belarus

A. L. Mosse
Plasma Physics and Chemistry Laboratory, A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, P.Brovka str. 15, 220072, Minsk, Belarus

Abstract

The paper is focused on study of heat transfer into parallel- and counter-flow triple torch electric arc reactors with air plasma temperature T = 3400-5800 K under processing of sprayed nitrate solutions at ranges of energetic criterion KEN = 1.3-12.5 and enthalpy factor Hgpi/Hw = 21-55. The generalized dependencies for heat transfer with wall and material processed into reactor's mixing chamber and cylinder channel (zone length xz ≤ 7 diameters) are established. The reactors with solution injection are out-performed of similar ones for powder processing on the level of fraction of plasma flow power transferred to material processed (Qp /N1 = 0.3-0.7) and are suitable for use in fine oxide materials production.