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Dry-ice blasting

Blasting operations in which dry ice pellets are pushed onto a workpiece at high speeds.

Illustration of Dry-ice blasting

The process

Ice pellets [1] is supplied to a compressed air mixing chamber [2] and pushed out at high speed through the nozzle onto the workpiece. When the pellets hit the contact surface it freezes and a thermal shock occurs in the surface contamination, which results in raised that shear stresses. This will release the contaminants which are removed using pressurized air.

Advantages and disadvantages
In comparison with alternative methods
Cleaning in place reduces downtime
No damage from equipment
reduces or eliminates the use of solvents, non-abrasive cleaning method
Non-flammable cleaning method
Non-conductive cleaning method
Clean and approved for the food industry
Relatively high cost