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Dry ice blasting and surface preparation

Dry ice blasting and surface preparation

Principle

The principle of dry ice cleaning is comparable to other blasting techniques such as sandblasting or HP cleaning, but uses solid pellets of frozen CO2. The pellets sublimate on impact, with their volume increasing by a factor of 700. This procedure involves the freezing, contraction, weakening and removal of contaminated surface layers.
Cleaning with dry ice brings significant advantages on two levels:
- The top layer to be treated contracts and becomes unstuck easily, not only due to the impact but also the severe cooling by the CO2 (-78°C). 
- In addition, the CO2 used by this process is eliminated without being treated by simply returning to its gaseous state (the pellets sublimate in the air after being blasted).

The majority of equipment can be cleaned in situ without being dismantled or waiting for them to cool down. The advantages are:
- Improve production quality 
- Avoid issues with health and safety due to toxic solvents and provide a healthier working environment.
- Reduce cleaning time, work costs, preventative maintenance, costs of repairing equipment and production downtime.
- No humidity. Eliminate secondary waste and removal costs
- Extend the life of equipment by minimising surface abrasion. 

Instead of using hard abrasive products to strip away (and spoil) a surface, cleaning by blasting dry ice uses soft dry ice, accelerated to supersonic speed that creates mini-explosions on the surface in order to separate the unwanted elements from the underlying substrate. Dry ice cleaning has a number of unique advantages over traditional blasting methods.
- It involves a non-abrasive, non-flammable and non-conductive cleaning process
- Ecological and without secondary contaminants such as solvents or grit
- Clean and approved for use in the food industry
- Allows the majority of articles to be cleaned in situ without wasting time dismantling them
- Can be used without harming active, mechanical or electrical parts or creating fire risks
- Can be used to eliminate production residues, stripping agents, contaminants, paintwork, oil and bio films

Applications

Cleaning factory installations by dry ice blasting
Thanks to the use of dry ice blasting for cleaning, industry benefits from very significant savings thanks to a considerable reduction in time for cleaning welding lines, moulds for plastic, rubber, metal and PU parts, electric motors, fans, structural elements, maintenance and general upkeep.
Dry ice blasting restoration
Dry ice blasting has become the preferred procedure for post-fire cleaning: elimination of soot and cleaning of damage caused by the fire, cleaning of facades, restoration of historic and graded buildings, restoration of monuments: statues, frescos, post-flood cleaning, elimination of mildew, asbestos removal and decontamination, removal of chewing gum, cleaning of construction machines and equipment.
Dry ice blasting of the production line
This cleaning technique presents another considerable advantage - that of its ability to be automated, since by setting the operational parameters, cleaning is very stable, uniform and always efficient, and very quick without waste particles to be re-treated.
Dry ice blasting in the food industry
Dry ice blasting is used in a number of sectors of the (agro) food industry such as the production of food and drinks, the chocolate industry, industrial baking, the production of pizzas and pasta, extrusion cooking, ready meals, animal feed etc. 
- Very quick and efficient methods 
- Dry and non-abrasive cleaning: no wear on the objects cleaned, safety of electric equipment. 
- Ecological and economical: dry ice leaves no trace and does not create additional waste requiring treatment.
- A significant increase in production thanks to its speed and efficiency (cleaning in situ without dismantling/reassembly, without cooling etc.).
Dry ice blasting of electric components
Dry ice blasting is highly recommended for cleaning high and low voltage equipment, such as: rotors and transformers, turbines, transformers and substations, AC/DC motors. , electrical cabinets, nuclear decontamination, etc.
Industrial maintenance by dry ice blasting
Dry ice blasting is used in various sectors of the industry, above all that of maintenance. Dry ice blasting is actually very efficient before, during or after maintenance work on an installation. Cleaning can take place while live, can reach all areas and is very quick.
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