Gas dynamic-thermal-concentration fields and evaporation process of quartz particles in Ar–H₂inductively coupled plasma

Abstract

The gas dynamic-thermal-concentration fields and evaporation process of quartz particles in the TICP torch of argon-hydrogen plasma have been studied. The effects of different methods of supplying hydrogen on the hydrogen concentration and gas temperature distributions, as well as on the vortex flow patterns have been discussed. The particle injection conditions in the pure argon and argon-hydrogen plasma have been determined. The dependences of the axial gas temperature and velocity distributions on the hydrogen volume fraction, flow rate of central gas and particle feed rate have been established. The effect of hydrogen volume fraction and different methods of supplying hydrogen on the evaporation degree of quartz particle in the TICP torch has been determined. The influences of the particle injection conditions (flow rate of central gas, probe tip position and injection patterns) on the evaporation degree in the TICP torch have also been evaluated. The specific heat cost for quartz particle evaporation has been calculated to evaluate the utilization efficiency of thermal energy.

Dynamic heating and thermal destruction conditions of quartz particles in polydisperse plasma flow of RF-ICP torch system

“…The quartz particle is considered as spherical and the temperature in it is uniform. Under those assumptions the motion and heating process of a single quartz particle in the plasma could be described as follows [23]: are the Stoke coefficient and Reynolds number for the sphere [33]. U p is the vector of particle velocity.…”

Impact of heat transfer on spheroidization of titanium alloys

“…These practices had been challenging due to the complexity of the process. When particles pass through the plasma, they can melt and evaporate and these phenomena are critical aspects in most studies (Miao L. et al, 2020). Prof. Pierre Fauchais (Fauchais, 2018) investigated heat transfer to the particles in the plasma torch.…”