| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing active carbon having a low metal content by activating granular carbide of cellulose acetate.SOLUTION: Regarding the method for producing active carbon, in an external heat type rotary kiln including: a heat resistant cylindrical body 13; hoods 14, 15 on both the edge parts thereof; a feed port 16 for the granular carbide of cellulose acerate provided at the hood 14; and an exhaust passage 17 for the activation-treated granular carbide provided at the hood 15, the granular carbide fed to the heat resistant cylindrical body via the feed port are heated in the presence of an activation gas so as to be activated, and are then exhausted via the exhaust passage, the activation is performed using water vapor as the activation gas and also using the heat resistant cylindrical body 13 in which at least the inside surface is formed from a ceramic material, and the exhaust of the granular carbide is performed using the hood 15 in which at least the exhaust passage and the surface region including the surrounding of the exhaust port are formed from a ceramic material. |
