dry ice blasting

Overview

Conventional blasting procedures are often accompanied by the following problems or rather disadvantages:

  • Wear through abrasive blasting media
  • Expenses for the disposal and recycling of the polluted media (e.g. sand, beads, water or the like), as well as long downtimes, given to the fact that the cleaning process often can only be carried out in a disassembled state.

The solution to this problems is dry ice blasting. It can be carried out on site, reducing downtimes and not leaving any leftovers whatsoever.  ^

Dry ice blasting is an innovative cleaning technique by means of dry ice pellets, i.e. the blasting pellets consist of solid CO² snow. The dry ice pellets are used as media during the cleaning process. They are dosed into a blast, accelerated up to supersonic speed and targeted via a pistol with a suitable nozzle at the soiling. The procedure is comparable to conventional blasting procedures. 

 What is CO² ?

The dry ice granulate is gained from a fast pressure reduction of the CO² in its liquid state. 

The CO² snow has a temperature of - 79°C (-110°F) and is pressed into pellets of 0,5-3.

Dry ice sublimates completely, i.e. it has no liquid state, but changes instantly into a gaseous state. It is neither conductive, nor poisonous or flammable.

 How does dry ice blasting work?

In principle, dry ice blasting is very similar to sand blasting, but uses dry ice pellets as blasting medium instead of sand.

The pellets are dosed through the dry ice blasting device into the blast, accelerated up to more than 150 m/s (- 492 ft/sec) and blasted via a hose and a pistol’s nozzle at the target soiling. The cleaning results not only from the kinetic but also from the thermal energy - the soiled areas embrittle cooling rapidly down to -79°C.  

Thanks to these two processes the pellets can penetrate the cracks in the soiling’s surface and sublimate there with a 400-times magnified volume.

Even relatively delicate surfaces can be cleaned without any problem, due to the fact that the pellets are very soft. 

 The following points demonstrate the method’s special benefits:

 No Wetness:

  • Dry ice sublimates to CO² gas and is released back into the atmosphere;
  • Short or no downtimes at all;
  • No corrosion of the material.

No wear / erosion:

  • Dry ice pellets don’t have an abrasive effect on most materials, thus preventing any damage to machines or tools.

 No disassembling of the machines necessary:

  • Cleaning processes can be executed while machines are assembled

 No chemicals, no blasting medium (e.g. corundum, glas), no liquid waste:

  • It’s eco-friendly, safe and cost-effective as it’s suitable for areas where neither water nor sand can be applied.