Vacuum cleaner air atomization (VIGA) Vacuum cleaner air atomization describes the smelting of steel or metal alloys under vacuum cleaner problems. Under gas security conditions, the metal liquid flows out (down) via the insulated crucible and diversion nozzle. It is atomized and broken into pieces by the high-pressure air flow via the nozzle. A a great deal of little beads solidify right into round or virtually spherical particles throughout flight to achieve the purpose of powder-making. ...