| 摘要 |
PURPOSE:To remove the effect of the impurities mixed in a powder by making up the structure of a heating pipe with a body of a heat resisting synthetic resin and a reinforcing spirals circled closely around the heating pipe body. CONSTITUTION:A device 50 for grading and drying the powder of green sheet material is provided with a pump 23 for pumping out the slurry 15 contg. the powder of green sheet material graded by wet method, a heating pipe 51 into which the slurry 15 is pumped by the pump 23, and a powder collecting chamber 25 connected to one end of the heating pipe under reduced pressure. The slurry 15 is run at a high speed through the heating pipe 51 while being heated therein, and the aforesaid powder is recovered in a dry state in the powder collecting chamber 25. The heating pipe 51 consists of a heat resisting synthetic resin-made heating pipe body 52 and reinforcing spirals 54 circled closely around the heating pipe body 52. |
