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1. 发明申请

WO2023046905A1 GRATE PLATE FOR A PULP LIFTER OF A GRINDING MILL 审中-公开
公开(公告)号：WO2023046905A1
公开(公告)日：2023-03-30
申请号：PCT/EP2022/076531
申请日：2022-09-23
申请人： METSO OUTOTEC FINLAND OY
发明人： VYORAL, Jakub
IPC分类号： B02C17/18 , B02C17/22
摘要： A grate plate is provided for use with a pulp lifter at a discharge end of a grinding mill. The grate plate has an outer edge, an inner edge, a leading side edge and a trailing side edge. The leading side edge and the trailing side edge have complementary shapes so that a series of grate plates can be mounted to the pulp lifter in a circular or annular array, with the leading side edge of each grate plate being adjacent the trailing side edge of an adjacent grate plate in the array. The grate plate comprises openings for passing through ground material particles of a predetermined size or smaller from the interior of the drum towards the pulp lifter. The grate plate further comprises, on a surface configured to face the interior of the cylindrical drum, one or more sections of lifter bars arranged so that the lifter bar sections on a number of adjacent grate plates complement each other to form lifter bars, wherein the lifter bar sections are shaped so that at least portions of the resulting lifter bars are inclined or curved in a first circumferential direction of the circular or annular array relative to a radial line of the array intersecting the respective lifter bar or lifter bar portion. At least portions of the complementary leading and trailing side edges of the grate plate are inclined or curved in a second circumferential direction of the array relative to a radial line of the array running through the point of intersection of the respective side edge with the outer edge. The second circumferential direction is opposite the first circumferential direction.

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