| 摘要 |
PROBLEM TO BE SOLVED: To provide a vertical pulverizer which prevents that fine powder stays between a roller and a recessed surface of table liner, overgrinding is caused and, also, the efficiency of grinding is lowered in a conventional vertical pulverizer. SOLUTION: This vertical pulverized is constituted in such a manner that a plurality of openings 14 almost horizontally penetrating a dam ring 13 which are erected on the outer peripheral surface of the table liner 11 are disposed radially in the radial direction, the proportion of the openings 14 to the inner peripheral area of the dam ring 13 and the shape and size thereof are freely adjustable and, also, the total height of the dam ring 13 is adjustable and is freely attachable and detachable. The fine powder in pulverized material is discharged outside the pulverizer selectively in succession, thereby, the prevention of overgrinding and the improvement of grinding efficiency is realized, the adjustment is performed so as to obtain the optimum pulverizing conditions in response to the change of properties of raw material, and the purpose is thus attained.
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