Emission Spectroscopy characterization of Plasma Flow in Inductively Coupled Plasma Spheroidization

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