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Radio-frequency plasma torch possesses high energy density, strong heating strength, and its plasma arc is huge. Due to no electrodes available, it can not generate polluting products caused by electrode vaporing.2.The principle of radio-frequency plasma powder balling technology refers to that inert gas (like argon) is ionized under the effect of high-frequency power supply and formed as hot inert-gas plasma; and the irregular raw powder is sprayed by vector gas (nitrogen) into the plasma through powder feeding device, and these powder particles absorb large amount of heat in hot plasma and their surfaces are melted rapidly; then these melted powder are sent into reaction device by extremely high speed, and chilled down under inert gas environment. Consequently, they are cooled down and solidified into spherical powder by surface tension; furthermore, they are sent into material gathering room and are gathered.
