dry ice blasting

Dry Ice Blasting: Cleaning with Solid CO₂ Pellets

In dry ice blasting, solid carbon dioxide pellets are accelerated by compressed air and directed onto the contaminated surface. The cleaning effect results from several factors: the mechanical impact of the striking pellets, the intense localized cooling, and the sublimation of the dry ice. During this process, the solid CO₂ transitions directly into a gaseous state. Unlike with traditional mineral or metallic abrasive media, no additional solid abrasive media remains on the workpiece.

However, this does not automatically remove all contaminants. Depending on the application, loosened grease, paint residues, production residues, or other contaminants must still be collected or removed. The particular advantage of this process lies primarily in the fact that no additional dry ice abrasive media needs to be collected after blasting.

Typical Applications of Dry Ice Cleaning

Dry ice cleaning is a viable option wherever dry cleaning is required or where water and chemical cleaning agents are undesirable. Typical applications include cleaning machinery and equipment, tools and molds, maintenance work, vehicle detailing, engine and component cleaning, as well as numerous tasks in production and service. For sensitive surfaces, the cleaning effect can be adjusted by varying the operating pressure, air volume, pellet size, dry ice volume, nozzle, and working distance.

However, whether a specific component is suitable for the process should always be assessed based on the material, coating, degree of contamination, and manufacturer’s specifications. A customized setting is crucial, especially for sensitive electronics or very thin or brittle materials.

From compact, portable devices to industrial dry ice blasting technology

The Dry Ice Energy Champ series in our product range covers a wide variety of performance classes. Compact systems such as the Champ Neo operate with particularly low volumes of compressed air and are designed for mobile cleaning tasks. Other Champ models offer increased air flow, operating pressure, and dry ice output, up to the Champ Ultra, which is designed for high industrial performance requirements.

This does not automatically mean that the most powerful machine is the best choice. For spot cleaning or delicate work, a smaller system may be more cost-effective and easier to handle. For large surfaces or stubborn dirt, on the other hand, higher air flow rates and more powerful nozzle combinations are required.

Compressed air supply is crucial for cleaning performance

A dry ice blasting machine can only achieve the performance that the compressor actually provides. Air consumption varies significantly depending on the machine and nozzle: the range extends from very compact systems requiring only a few hundred liters per minute to industrial machines requiring several cubic meters of compressed air per minute. In addition to the flow rate, working pressure, hose diameter, couplings, and compressed-air treatment must be taken into account.

Moist compressed air can impair operation. Water separators, filter regulators, or additional compressed-air treatment may therefore be advisable, depending on the compressor and operating conditions. Long or undersized compressed-air hoses also cause pressure losses and can reduce actual blasting performance.

Omnidirectional, flat-jet, and angled nozzles

The nozzle plays a key role in determining how the available energy is transferred to the surface. Round blast nozzles concentrate the jet onto a smaller area and are suitable for targeted cleaning. Flat blast nozzles distribute the jet over a wider area. Angled nozzles make it easier to work on concealed or hard-to-reach areas.

The nozzles must be compatible with the respective device. The current Champ series features different interfaces: The Champ Neo uses its own nozzle, the standard Champ models share a common nozzle design, and the Champ Ultra uses nozzles specifically designed for it. Therefore, device compatibility should always be checked before purchasing.

Store dry ice properly and use it while it’s fresh

Dry ice cannot be stored indefinitely. It continuously sublimates even in an insulated storage box, causing it to lose mass over time. For a cost-effective blasting process, the delivery quantity, scheduled use, and storage capacity should therefore be planned carefully. Well-insulated dry ice boxes reduce the loss but do not completely stop sublimation.

Occupational Safety in Dry Ice Blasting

Sublimation produces gaseous CO₂. Therefore, especially in enclosed or poorly ventilated areas, adequate ventilation and a proper risk assessment must be ensured. In addition, there are the typical hazards associated with compressed air, high noise levels, very cold dry ice, and possible electrostatic charging. Appropriate protective equipment, hearing protection, cold-weather gloves, and, if necessary, safe grounding are therefore essential for professional use.

Dry Ice Blasting as a Coordinated Cleaning System

The equipment alone is not the only factor crucial to cost-effective dry ice cleaning. The compressor, compressed-air quality, nozzle, dry ice, accessories, and application must all work together. ABS Strahltechnik offers dry ice blasting technology for professional users and provides support in matching the equipment, compressed-air supply, nozzle selection, and accessories to the specific cleaning task.