2.2.7 Ice Blasting
This application mainly uses carbon dioxide ice. It is suitable for removing paints, dirt, grease and similar coating on surfaces.
Carbon dioxide ice is carbon dioxide (CO2) in solidified form. It is odourless and not toxic.
Fluid carbon dioxide being under high pressure is decompressed in special machines. This process generates the carbon dioxide ice with a temperature of – 79°C. Then, fine granular material is made of this carbon dioxide ice; this granular material can be used as abrasive.
You can get the carbon dioxide ice abrasive in special cooling boxes.
When using carbon dioxide ice special compressed-air and injection blasting units are necessary to use. Within these units the granular material is blasted onto the surface to be cleaned. The soiling contracts and embrittles because of high supercooling during the contact time of the abrasive and the surface of the workpiece. This so-called “thermo tension” detaches the layer form the basic material. The coating will then completely be removed with the help of the speed of the subsequently impinging granular parts. This is called the ”thermal effect”.
Immediately after the impact the granular material dissolves completely into gas and goes back into the atmosphere.
- Table of contents
- 1. Fields of application of abrasive blasting technology
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2. Blasting technology
- 2.1 Airless blast cleaning
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2.2 Injection blasting
- 2.2.1 Compressed air blasting (also air blast cleaning or sand blasting)
- 2.2.2 Pressure blasting (injector blasting)
- 2.2.3 Vacuum-compressed-air blasting and vacuum injection blasting
- 2.2.4 Damp blasting
- 2.2.5 Wet blasting
- 2.2.6 Slurry blasting
- 2.2.7 Ice Blasting
- 2.2.8 Water- jetting cleaning and hydro-jetting
- 2.2.9 Wet blasting for fine surface treatment
- 2.2.10 Combination of different blasting methods
- 2.3 Laser cleaning
- 3. Abrasive
- 4. Efficiency assessment of abrasive blasting
- 5. Influence of compressed-air blasting on the surface of the workpiece
- 6. Generation of compressed air
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7. Plants for compressed-air blasting
- 7.1 Small and medium-sized blasting pots
- 7.2 Large blasting pots
- 7.3 Double-chamber blasting pot
- 7.4 Mixing and dosing valve
- 7.5 Hoses, lengths of hoses, couplings
- 7.6 Selection of a blasting pot in considering the wear and tear behaviour
- 7.7 Increased wear and tear at the blasting pot caused by wrong adjustment
- 8. Remote control and emergency shut-downs
- 9. Jet nozzles
- 10. Stationary blasting halls
- 11. Mobile abrasive blasting equipment
- 12. Laws and provisions