| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller mill structure which wholesomely keeps operation performance by suppressing interference of internal circulation and further is made possible to reduce maintenance frequency due to abrasion. SOLUTION: A roller mill 10A is equipped with: a mill body 11 of a roughly cylinder shape; a turntable 12 rotating in the mill body 11, two or more rollers 13 rolling on the turntable 12 to pulverize an object to be pulverized; and a classifier 20A which is installed at an upper part in the mill body 11 and has a powder exit 14, wherein the object to be pulverized charged in the mill body 11 is pulverized and particulates obtained by pulverizing the object to be pulverized is internally circulated by air stream transportation to carry out classification and re-pulverization. Internal circulation is constituted of an upward flow FU which blows up at an outer peripheral side of the mill body 11 along a wall surface and a downward flow FD which flows downward around a central part of the mill body 11. COPYRIGHT: (C)2009,JPO&INPIT
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