| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide woody cement boards consisting of woody components and inorganic components as raw materials by recovering the woody components and inorganic components from waste materials of woody cement boards. SOLUTION: The primarily crushed matter obtained by volumetrically crushed the waste materials of the woody cement boards containing cementitious inorganic materials and woody reinforcing materials is further subjected to surface crushing, by which the scondarily crushed matter is obtained. The scondarily crushed matter is classified to the inorganic components and the woody components by air current and rotary classifying vanes 2. The resultant inorganic components are used for the core lawyers of the woody cement boards and the woody components are used for the front and rear layers thereof.</p> |
