Dry Ice Blasting
Dry ice blasting is an innovative blasting method that uses tiny, solid dry ice pellets as the exploding material. The dry ice bits are speed up in a jet of compressed air alike to that used in usual blasting methods. Basically it is designed to put back the traditional ones and high-pressure hosing blasting techniques that use materials such as plastic, glass and sand as abrasive means. With the help of this modern and innovative technique various tough and harsh stains can be cleaned very easily.
The unique characteristic of dry ice during blasting is that it vaporizes when it comes in contact with the surface, without leaving the residues of blasting materials or detergents on the treated surface. As this method is an entirely non-conductive and dry.
How to clean the surface with dry ice
Cleaning the surface Dry Ice is completely safe and effective. Dry ice cleaning is known in various names like dry ice dusting, dry ice blasting and dry ice blast cleaning. It is similar to plastic bead blasting, sand blasting, or soda blasting, where a medium is hastened in a pressurized air stream to clean the surface. But that’s where the similarity ends.
Unlike traditional ones the dry ice cleaning uses softy dry ice, hastened at supersonic pace, to generate mini-explosions on the surface that pick up the unwanted item off the underlying substrate rather than using hard and rough media to grind the surface. Another great advantage is that it can be used in both open and closed space.
Dry ice blasting is used to baked-on paint in engine rooms, eliminate surface corrosion, cleaning grease stains and cleaning of high cabinet, electronics, motors, mechanical assemblies, pneumatic and hydraulic lines. Dry ice blasting leaves completely degreased and dry surface without any extra waste.
It can be categorized into six general areas to know its benefits. Each one is discussed:
1 – Reduced Downtime through Cleaning In-Place
Normal cleaning requires the equipment to be disassembled and relocate to the area where the cleaning has to be done, but with dry ice blast cleaning we don’t have to do such things. Equipment can be dirt free in-place and hot in most state. Because of that, various time consuming, labour intensive steps which were essential with other process such as sand blasting can be removed including:
- Transporting equipment to and from a particular cleaning place
- Cool down
- Reheating time
2 – Faster and More systematic Cleaning
Much time can be preserved with dry ice blast cleaning rather than cleaning the area with hard and rough materials or wire brushes. Much men power can also be preserved. More than that the CO2 blast method cleans in gaps which is impossible to reach by hand. As a result, tools run more proficiently and potential leaks are open maybe preventing main system failures.
3 – Removal of Equipment Damage
Cleaning methods such as plastic bead blasting, sandblasting leave a hard and aggressive result on the surface. They actually changes the surface by removing the part of it, whereas by dry ice cleaning the surface doesn’t have structural changes rather it cleans the surface very neatly. It picks up the dirt and stains away. Secondly, in this type of cleaning equipments can be cleaned in their place only without damaging them.
4 – Elimination or Reduction of Solvents
While using CO2 pellets solvents are not used. This can be an important requirement for specific companies in order to meet the terms with environmental rules or to get better worker safety. There are no problems pertaining to toxicity.
5 – Reduction in Waste Dumping
Unlike other and traditional cleaning methods, whether it be with sand blasting, solvents or any other means, the cleaning agents also becomes a secondary contaminant and get disposed with the primary ones as a toxic waste. Whereas in dry ice cleaning the CO2 pellets get vaporized leaving the waste contaminant only. This will result in major waste reduction.
6 – Amplified Safety
CO2 blasting pellets are non-hazardous, non-toxic creating benefits to your employees, surroundings, and production facility.
- Safe for end products
- Safe for equipment
- Safe for the environment
- No minor waste
- Safe for employees
Applications for Dry-Ice Blasting
In other words, dry-ice blasting is not a paint stripper. While limited success cases exist in paint stripping via blast pressures from 150 to 300 psi (1to 2 MPa), most results specify partial to full failure to remove topcoats at gainful rates, and failure is still more apt when the goal is to totally eliminate a primer. Booming applications in painting-related tasks are the rule rather than the exception when:
Risky Coatings and Materials
Due to media vaporization, aloof materials such as asbestos, lead paint or coatings that are contaminated or radioactive with PCBs require no additional separation before processing for dumping, nor are the quantity gets better as a result of being mixed with grit, water, chemicals, or any other cleaning agents.
Greasy Factory Ceilings
Dry-ice blasting is efficient on oils and grease and now it is also used for prepare ceilings in greasy factory for repainting. Here the waste material is almost nil so the use of sensitive machinery is minimal. After the dry ice blasting the surface is ready for coating no further operation is needed.
Flaking Factory Ceilings
Dry ice blasting is very effective at removing a coating which is not well bonded and which is flaking. Those areas are ready for coating which have good paint adhesion and preparation includes just cleaning.
Repainting Machine Tools, Equipment and Machines
The finest quality of dry ice blasting is that it cleanse the complete machine without removing its factory paint and makes the machine ready for repainting without any other preparation like rinsing or masking. This sort of cleaning is much faster and does classic cleaning than manual preparation. Dry ice blasting is completely environmental friendly.