VERTICAL ROLLER MILL

• Main Authors: ARIMA KENICHI, SUEOKA YASUHIRO, TSUTSUBA TAKASHI, MATSUMOTO SHINJI, MATSUZAKI MITSUTERU, YAMAGUCHI SOTARO, YAMAMOTO TSUGIO, DAIMARU TAKUICHIRO
• Format: Patent
• Language: English
• Published: 08.03.2012
• Subjects: CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN; PERFORMING OPERATIONS; PREPARATORY TREATMENT OF GRAIN FOR MILLING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a vertical roller mill equipped with a fixed type classifier capable of reducing the ratio of coarse particles in product powdered coal.SOLUTION: In the vertical roller mill wherein a cyclone type fixed classifier is provided in a casing, the fixed classifier is equipped with a conical member of which the tapered part is positioned downward, the fixed blade inlet window opened to the conical member to introduce a solid-gas two-phase flow into the conical member, the flat plate-shaped fixed blade 23A attached in the vicinity of the fixed blade inlet window inside the conical member to revolve the solid-gas two-phase flow, the inner cylinder provided to the axial center of the conical member and guiding powder coal from the lower end part to the upper end part of the conical member by revolving the solid-gas two-phase flow and a powdered coal outlet for guiding the powdered coal guided to the upper end part of the inner cylinder to the outside of the conical member. The fixed blade 23A is provided with a leading end part 23b where the flow of the solid-gas two-phase flow guided into the conical member from the fixed blade inlet window increases downward.