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 “dry ice“.
How to make dry ice?
Dry ice can be made by our Shuliy dry ice machine and it can be dry ice pellets with different diameters or dry ice blocks with different thicknesses. And for keeping the dry ice blocks or dry ice pellets, 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 dry ice 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.
- Usiguse barafu kavu moja kwa moja na mikono yako. Vaa glavu za kinga ili kuzuia baridi!
- Itakuwa bora kuacha nafasi kati ya bidhaa unayotaka kupoe vizuri kwa barafu kavu.
- Hairuhusiwi kufunga barafu kavu kwenye chombo cha chupa kwa kuziba vizuri.
- Kuwa na uingizaji hewa mzuri mahali ambapo barafu nyingi kavu huwekwa.
How to deal with dry ice frostbite?
Baada ya baridi, tunapaswa kuhamia haraka mahali pa joto ili kudumisha sehemu iliyoathirika katika hewa ya joto na kavu. Frostbite huwekwa kwenye maji ya joto yaliyorekebishwa hatua kwa hatua (digrii 38.8 ~ 40.5) kwa ajili ya kuhifadhi joto. Haiwezi kuwa wazi kwa baridi, kuinua sehemu iliyoathirika ili kupunguza maumivu na uvimbe, kisha kufunika sehemu iliyoathirika na chachi safi, na kisha kupelekwa hospitali kwa matibabu.
Madhumuni ya dharura ni kurudisha haraka maji baridi ya mwili kuwa ya kawaida. Kwa hiyo, ikiwa eneo la jirani la sehemu iliyoathiriwa inakuwa joto, baridi itaponywa haraka. Ni marufuku kuingiza sehemu iliyoathiriwa moja kwa moja ndani ya maji ya moto au kutumia moto ili kuoka sehemu iliyoathiriwa, ambayo itaongeza baridi. Kumbuka usifanye massage kwenye eneo lililoathiriwa.