Abstract: An apparatus for creating ice pellets having a rotationally mounted drum, a cryogenic component for cooling the outer surface of the drum, a fluid droplet applicator for transferring droplets to the outer surface of the drum, and a particle removal blade for removing solidified particles from the drum surface. Methods are also disclosed for creating ice pellets including transferring fluid droplets to a rotating drum having an outer surface sufficiently cold to cause solidification of the droplets during a period of drum rotation. Upon solidification, the particles are removed and made available for subsequent use. Such subsequent use includes disposing the apparatus in a pressurized vessel, collecting the pellets, and feeding the same, under pressure, to the ambient environment.

Abstract: An apparatus for creating ice pellets having a rotationally mounted drum, a cryogenic component for cooling the outer surface of the drum, a fluid droplet applicator for transferring droplets to the outer surface of the drum, and a particle removal blade for removing solidified particles from the drum surface. Methods are also disclosed for creating ice pellets including transferring fluid droplets to a rotating drum having an outer surface sufficiently cold to cause solidification of the droplets during a period of drum rotation. Upon solidification, the particles are removed and made available for subsequent use. Such subsequent use includes disposing the apparatus in a pressurized vessel, collecting the pellets, and feeding the same, under pressure, to the ambient environment.

Abstract: An apparatus for recovering and cleaning contaminated abrasive blast media. The blast media is transported in a vacuum airstream to a rotatable drum. Within the rotatable drum is a blocking assembly which selectively channels high-velosity air through an upper region of the rotatable drum and restricts the flow of air through a lower region of the drum. The blast media is repeatedly scooped up and dropped to the high-velocity airstream, thus subjecting it to repeated air-washing. The blocking member includes a flexible member which provides both the open channel region and the restriction to the airflow under the force of gravity as the drum rotates. The abrasive blast media is thus assured of being adequately washed even if the air velocity varies randomly during the cleaning of the blast media.