The products, mainly composing of calcium oxide (CaO), and generated through calcinations of natural rocks which are with calcium carbonate as its main ingredient and through elimination of degraded carbon dioxide during calcinations is lime, which is also called quick lime. Quick lime is the drying agent commonly used to eliminate steams through chemical absorption, and can also be used in the production of steel, pesticides, medicines, drying agent, hides processing and dewatering of alcohol. Besides, it is especially applicable to the production of local specialties including puffed foods, mushrooms and agarics, and can also be used in instruments, medicines, apparels, electronics and communications, hides and textile industry.

　　The appearance of quick lime is white (or grey, brown white), and is not in a determined shaped. It can absorb water and carbon dioxide from air. Calcium oxide can react with water and generate calcium hydroxide and produce heat. It is soluble in water but not soluble in alcohol. It is in organic alkaline and corrosive substance, its national dangerous goods code is 95006. Moreover, quick lime will react with water and then heat up itself to a temperature higher than 100℃.

　　The main constituent of quick lime is calcium oxide (CaO), which is a kind of white solid and is fire resistant and hard to dissolve in water. Calcium oxide can be obtained through calcinations of limestone that is with high CaO content in ventilated lime kiln to above 900 ℃. Quick lime is water absorbent and can be used as drying agents. Besides, it is usually used to prevent moisture regain of sundries. Quick lime is the drying agent commonly used to eliminate steams through chemical absorption, and can also be used in the production of steel, pesticides, medicines, drying agent, hides processing and dewatering of alcohol. Besides, it is especially applicable to the production of local specialties including puffed foods, mushrooms and agarics, and can also be used in instruments, medicines, apparels, electronics and communications, hides and textile industry.