| 摘要 |
<p num="1"><br/><br/><br/>A refiner (1) comprising a stator (2) and a rotor (6) that comprise a planar <br/>portion and a conical portion after the planar portion, which in turn comprise <br/>refining surfaces (4, 8) provided with blade bars (15, 18, 24) and blade <br/>grooves (16, 19, 25) therebetween, and the planar portions (4~, 81) of the <br/>refining surfaces (4, 8) of the stator (2) and the rotor (6) comprising at <br/>least two refining zones (14, 17, 23) in the direction of the radius (R) of <br/>the planar portion. At least the planar portion (8~) of the refining surface <br/>(8) of the rotor (6) is provided with blade bars (18) in its outermost <br/>refining zone (17) in the direction of the radius (R), the blade bar angle <br/>(.alpha.) of the blade bars being arranged so as to provide pumping blade <br/>bars, and their blade bar angle (.alpha.) being greater than the blade bar <br/>angle (.alpha.) of the blade bars (15, 24) in the previous refining zone (14, <br/>24) in the direction of the radius (R) of the planar portion (8'') and that the <br/>blade bar angle (.alpha.) is 5 - 50 degrees so that the blade bars (18) in the <br/>outermost refining zone (17) have an overall pumping effect on the material to <br/>be refined.<br/>
|
