Emission Spectroscopy characterization of Plasma Flow in Inductively Coupled Plasma Spheroidization

摘要

Gas temperature are crucial parameters for inductively coupled plasma spheroidization. Spatial resolvedtemperature measurement of the high-temperature flow field in the plasma reactor provide quantitatively basis andevidence for theoretical study of plasma spheroidization and industrial methodology optimization. It leads toresearch gap in flow diagnostics for high-temperature inductively plasma flow owing to the inapplicability ofconventional diagnostic techniques. This paper presents in-situ and non-intrusive diagnostics for argon plasmaflow in the inductively coupled plasma spheroidization based on optical emission spectroscopy and electricscanning technique. Two-dimensional spatial temperature in the radial direction was measured at a cross sectionunder the powder feed gun. Gas temperature in the center was 10120 K± 240K, while the maximum temperaturezone was positioned close to the core with specific values of 10500 K± 240K and 10620 K± 240K, respectively.