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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.19 SNIP: 0.341 CiteScore™: 0.43

ISSN Druckformat: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v13.i2.10
pages 121-135

TRANSPORT AND HEAT PHENOMENA OF TRANSFERRED DC ARC UNDER AUTO-ELECTRO-MAGNETIC ROTATION (AEMR) IN PLASMALAB REACTOR

Mihail K. Mihovsky
“PLASMALAB” - Plasma Metallurgy Research Laboratory, University of Chemical Technology and Metallurgy - Sofia, 8 “Kliment Ohridsky” Blvd., 1156, Sofia, Bulgaria
V. Hadzhiyski
“PLASMALAB” - Plasma Metallurgy Research Laboratory, University of Chemical Technology and Metallurgy - Sofia, 8 “Kliment Ohridsky” Blvd., 1156, Sofia, Bulgaria

ABSTRAKT

Metallurgical plasma reduction technologies provide possibilities for effective processing of poor raw materials (ores, concentrates) and waste (slag, slimes, dross) from metallurgical and chemical industry.
A characteristic feature and main advantage of most of these technologies is that the materials can be processed in a fine disperse form.
The aim of the use of existing plasma furnaces and reactors is as follows: by applying different technologies to provide the fastest smelting of the powdered charge and achieve the best contact between the reduction agent and the smelted oxide material.
These requirements are satisfied mainly by the way of powdered charge introduction and control of the plasma arc in the new PLASMALAB FFP-reactor. The adopted type of charge introduction is through the hollow cathode. There is an inductor coaxially mounted on the tube reactor-anode. Its serial connection in the anode electric chain enables the arc to rotate by its own current (Auto-Electro-Magnetic Rotation - AEMR).
This combination ensures maximum convective and radiation heat exchange between the disperse material and the plasma arc.
Transport phenomena due to the rotating arc are determined accounting for arc current and strength of the magnetic field applied.
Special indirect method for the determination of heat exchange between arc and powdered material is developed.
The influence of arc length and arc speed rotation on the heat and mass exchange in PLASMALAB FFP-reactor space is investigated and discussed.

REFERENZEN

  1. Mihovsky M.K., Plasma Metallurgy - States of the Art, Problems and Future.

  2. Mihovsky M., Hadzhiyski V., and Todorov L., Electromagnetic and Gas Dynamic Control of Transferred Plasma Arc in Metallurgical Plasma Reactors and Furnaces.

  3. Mihovsky M., Hadzhiyski V., and Todorov L., New Feeding System for Plasma Reactor "PlASMALAB" for Reduction Processing of Disperse Raw and Waste Materials.

  4. Hadzhiyski V. and Mihovsky M., Speed Determination of Auto-Electro-Magnetic Rotation (AEMR) of DC Arc in "PLASMALAB" FFP-plasma Reactor.

  5. MacRae D.R., Plasma Reduction of Iron Ores to Raw Steel.

  6. Gold R.G., Sandall W.R., Cheplick P.G., et al., Plasma Reduction of Iron Oxide with Hydrogen and Nature Gas at 100 kW and one Megawatt.

  7. Mihovsky M. and Tzonev Tz., Advenced Plasma Furnace and Technology for Reduction Processing.

  8. Mihovsky M.K. et al., Cathode Unit with a Hollow Graphite Electrode for a Metallurgic Arc Plasmotron.

  9. Mihovsky M., Tzonev Tz., and Lucheva B., Plasma Torch-Reactor for Reduction Processing in Metallurgy.

  10. Mihovsky M., Tzonev Tz., and Lucheva B., Motion Organization of Plasma Arc in Plasma Torch-FFP-Reactor System.


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