| 摘要 |
<p>PURPOSE:To provide the rotary regenerative dehumidifying body excellent in moisture absorbing capacity regenerability, durability and dimensional preciseness as well as being prepared easily comprising activated alumina molded into a hyneycomb like rotary drum. CONSTITUTION:Alumina trihydrate is contacted with a hot gas with a temp. of about 400-1,000 deg.C for about 1-10sec to be partially calcined to obtaine a transition alumina powder of which ignition loss is about 2-10% and the particle size is about 1-20mum and a preparation obtained by adding about 20- 60pts.wt. of water to 100pts.wt. of said alumina powder is molded by extrusion to form a honeycomb like rotary drum. In the next stage, this molded body is held in steam with a temp. of about 50-150 deg.C for about 30min or more to cure alumina by rehydration. The resulted alumina is heated to about 300-900 deg.C to activate it to obtain a rotary regenerative dehumidifying body comprising the molded body excellent in moisture absorbing capacity and mechanical strength.</p> |
