Dry Ice

We always make it fresh

Dry ice is a cooling medium which can be used in a whole range of different applications. Frozen CO2 is an indispensable coolant in sectors such as the pharmaceutical, chemical and food industries!

Liquid carbon dioxide is stored in a low-pressure tank at approximately 20 bar and at a temperature of around -20°C. When sprayed into a pelletizing cylinder, it forms carbon dioxide gas and carbon dioxide snow as a result of cooling and expansion to the ambient pressure. This snow, which has a temperature of approximately -78°C, is compacted and then pressed through a pelletizing matrix. This produces dry ice pellets measuring around 3 mm in diameter and 10 mm in length.

LKY Kältetechnik offers dry ice in the form of pellets, nuggets or blocks. Products are dispatched in weights starting from just 10 kg in special insulated polystyrene boxes with flexible capacity. Larger quantities are dispatched in special dry ice containers with a capacity of up to 600 kg.

Benefits of dry ice technology:
  • Dry ice pellets have a low degree of hardness.
  • So, they can be used to clean even sensitive surfaces. The dry ice blasting process can be adapted to the properties of the surface to be cleaned by varying the process parameters.
  • Dry ice pellets are a viable alternative to organic -solvents that are harmful to the environment and¬ halogenated hydrocarbons.
  • Only the removed dirt remains as waste.
  • Dry ice blasting granule is sublimated without leaving any waste.
  • The facilities to be cleaned are out of service only for a short time due to cleaning.

Dry Ice Features

Properties of CO'2

The graph below (p, T) shows the state of existence of CO2 gas depending on temperature and pressure.

CO2 gazı, renksiz, kokusuz, yanıcı olmayan ve tadı olan bir gazdır. Büyük oranda volkanlarda ve yer katmanlarında bulunur. Hayvansal ve insansal maddelerin değişiminden ortaya çıkar.
Eğer bu gaz konsantrasyonu havada %0,05 oranını aşarsa, atmosferdeki oksijen oranı azalır ve nefes almayı zorlaştırır. Bu gaz, havadan %40 oranında daha ağırdır.

Bundan dolayı yere yakın bölgelerde bulunur. Bu yüzden kapalı yerlerde dikkatli olunması gerekir. Bu Tür yerlerde havalandırma ve emme sistemlerinin bulunması gerekir. Normal havalandırmanın, pencere ve kapılar vasıtası ile yapılması, normal bir CO2 konsantrasyonunun elde edilmesi için yeterlidir.

Fiziksel Bilgiler:
Normal Density: 1,977 kg/m3 (1,0B25 bar, 0C)
Critical Temperature: 31C
Critical Density: 466 kg/m3
Flight Notation: -789C at 0,9 bar

Dry Ice – Pieces

Dry Ice Parts – Manufactured by means of a Pore (Ice Making Machine) called Pellets. Liquid CO2 is sprayed into the porosity. The snow that comes out of this process is transformed into cold bouquets by means of a hydraulic pump and shaped by means of this bouquet mold. Thus, ice particles (Brass size) are formed with a diameter of approximately 3 mm and a length of 8 mm.

The dry ice particles are then transported to the field of use with large ice storage containers and then put into use.

Dry Ice Blasting Technique

Dry ice blasting is a state-of-the-art cleaning method that cleans and removes coatings from industrial machines and tools in a professional way. CO2 is used as a blasting medium whenever a cleaning process is required that involves gentle surface treatment, a residue-free blasting agent and the avoidance of waste. Thanks to the low degree of hardness of the ice, sensitive tools can be cleaned without problems – even whilst they are still installed. Dry ice is sublimed without leaving any residue. This means that only the removed dirt remains as waste.

Dry ice blasting technology is used, for example, wherever the following requirements apply:

  • Gentle surface treatment
  • A residue-free blasting agent
  • Avoidance of waste

Dry Ice Cleaning Technique

With a suitable compressor system, the required operating pressure of 6-14 bar is obtained. The compressed air is dried and delivered to the spray gun with a hose to prevent operating failures that may occur due to ice build-up. The pressure created by a transverse cutout delivers the CO2 particles in the carrier hose with the gun. These ice particles are blasted onto the part to be cleaned with a great pressure and the cleaning process is carried out.

Dry Ice Cleaning Method

Basic Principles of Management

The basic feature of the dry ice cleaning method is based on the use of carbon dioxide (CO2) gas at 0.03% in air. The carbon dioxide gas has a cold temperature of -78 °C under normal atmospheric conditions. This gas solidifies from the gaseous form at a certain temperature. This solid form of gas is popularly referred to as "dry ice" in colloquial language. The CO2 gas that is sprayed into the pores of the ice machine is converted into dry ice by a certain amount of heat. The dry ice obtained in this way is sprayed onto the surface to be cleaned at a pressure of 100-300 m/s. Due to the kinetic energy released from the dry ice blast combination, it cleans unwanted layers and dirt on the soiled surfaces. Using this method in industrial cleaning is more attractive than other cleaning methods. This is because, thanks to this method, the organic solvents and harmful hydrocarbons in other cleaning methods, which are harmful to the environment, are deactivated. There is little residue left by the removal of layers and dirt. In addition, this method only affects the upper surface of the molds to be cleaned and there is no side effect with parameters that will change the properties of the molds.