|About this Abstract
||Materials Science & Technology 2017
||Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
||Experimental Analysis for Thermally Non-equilibrium under Microwave Irradiations to Oxide Iron Powders
||Motoyasu Sato, Akihiro Matsubara
|On-Site Speaker (Planned)
Highly pure pig irons were produced in a multimode microwave furnace from powdered iron ores with carbon as a reducing agent in the nitrogen atmosphere. Microwave-matter interaction creates thermal non-equilibrium state beyond a sreshhold intensity of microwave field.
The visible light spectroscopic techniques was used to monitor the progress of the reactions. Up to 650°C, the heated powders radiate the continuous spectrum of blackbody emission. The small non-equilibrium hot spots rise, move and finally burst in to brighter light emitting from all over the surface at 650°C. CN molecules and Fe (I) atoms were identified in the recorded spectrum. Note that, the line spectra originated from CO molecules have not been detected in these reactions.
When these“ignition propagation”were observed, the solid-solid reaction could be expected between the iron oxides and carbon to produce CO2 directly, and it produced melted ions below 1380ºC.