| 摘要 |
<p>PURPOSE: To prevent the turbulence of a classifier air current at the tip of a classifying edge and to perform classifying with high accuracy by an accurate classifying point by fascilitating setting of the classifying edge at an optimum position. CONSTITUTION: On lower side walls 23, 25 of side wall blocks 22-24, classifying edges 17, 18 are provided. In the lower part of the side wall block 22, a raw material feeding pipe 16 opened to a classifying chamber 32 is installed. Besides, a core bloc 26 bent downward in the shape of a long ellipse connected to the extention of the tangent line of the bottom of the pipe 16 is installed. In an upper wall 27 of the classifying chamber, an intake air edge 19 of knife edge type is provided on the lower part on the classifying chamber 27 side, and intake air pipes 14, 15 opened to the classifying chamber 32 are installed across the upper wall 27 of the classifying chamber. The pipes 14, 15 are provided with the 1st and the 2nd gas introducing adjusting means 20, 21 and static pressure meters 28, 29, respectively. The classifying edges 17, 18 and the intake air edge 19 can be rotated and set to a desired position. Since a classifying point is thus set accurately, powder having sharp particle size distribution is effective produced, and also there in no variation in the classifying point, and in addition, the change width of the classifying point is extended.</p> |
