Abstract

The processes of the heating and evaporation of quartz particles in an argon plasma flow of high-frequency induction plasmatron are numerically simulated within the model of a two-phase, collisionless, monodispersed mixture. The conditions for the implementation of a ring-type vortex flow pattern with full and partial particle penetration into the high-temperature zone are determined. The effect of particle feed rate on the gasdynamics of a dispersed flow is shown. The dependences of the evaporation efficiency on the main operating parameters of particle processing process, primarily, the particle feed rate, Joule power of the plasmatron, particle size and injection angle are established. Recommendations are given for the selection of the optimal operating parameters of the plasmatron and flow parameters of the processed quartz particles. It is shown that such a plasmatron with a power of about 5 kW provides a complete evaporation of quartz particle flow with diameter up to 50–70 μm and feed rate up to (8–10) × 10^–5 kg/s at specific energy costs at a level of 50 MJ/kg.

中文翻译：

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感应等离子氩气等离子体流中单分散石英颗粒蒸发过程的数值模拟

摘要

在两相，无碰撞，单分散混合物的模型中，对高频感应等离子加速器的氩等离子体流中石英颗粒的加热和蒸发过程进行了数值模拟。确定实施环形涡流模式的条件，其中颗粒全部或部分渗透到高温区。显示了颗粒进料速率对分散流的气体动力学的影响。建立了蒸发效率对颗粒处理过程主要操作参数的依赖性，主要是确定了颗粒进料速度，等离子加速器的焦耳功率，粒径和注入角。给出了选择等离子加速器的最佳工作参数和处理过的石英颗粒的流量参数的建议。^–5 kg / s，特定能源成本为50 MJ / kg。