When the carbon dioxide gas is pressurized to about 101,325 Pa at room temperature, when a part of the carbon dioxide vapor is cooled to about -78 ° C, it freezes into a snow-like solid carbon dioxide. Solidified carbon dioxide has a large heat of vaporization, which is 364.5 J/g at -60 ° C. When gasified under normal pressure, the ambient temperature can be lowered to about -78 ° C, and no liquid is produced, so it is called “đá khô“.
How to make dry ice?
Dry ice can be made by our Shuliy máy làm đá khô and it can be dry ice pellets with different diameters or dry ice blocks with different thicknesses. And for keeping the khối đá khô hoặc viên đá khô, we can provide special dry ice heat preservation box for long time dry ice keeping. Besides, dry ice blasting machine is also in hot-sale in our dry ice machine factory, which has different models and working capacities so that we can help you choose the most suitable one.
Be safe when you use dry ice
Dry ice is a solid state of carbon dioxide. Because the temperature of dry ice is very low, the temperature is minus 78.5 ° C, so it is often used to keep objects in a frozen or low-temperature state. Every time you touch dry ice, be careful and use thick gloves or other coverings to touch dry ice! When the human skin touches the đá khô for a long time directly, it may cause the cells to freeze and resemble minor or severe frostbite. Therefore, we should be careful when using dry ice. The followings are some precautions for use dry ice safely.
- Do not touch dry ice directly with your hands. Wear protective gloves to prevent frostbite!
- It would be better to leave the space between the items you want to cool properly with the dry ice.
- It is forbidden to seal dry ice in the bottle container with good sealing.
- Have good ventilation in places where a lot of dry ice is placed.
How to deal with dry ice frostbite?
After frostbite, we should quickly move to a warm place to maintain the affected part in warm, dry air. The frostbite is placed in a gradually adjusted warm water (38.8~40.5 degrees) for heat preservation. Can not be exposed to the cold, raise the affected part to relieve pain and swelling, then wrap the affected part with clean gauze, and then sent to the hospital for treatment.
The purpose of an emergency is to quickly return the cold body fluid to normal. Therefore, if the surrounding area of the affected part becomes warm, the frostbite will be cured quickly. It is forbidden to soak the affected part directly into hot water or use the fire to bake the affected part, which will increase the frostbite. Remember not to have a massage in the affected area.