SECONDARY GRINDING SECTION FOR AN ORIFICE PLATE OF A GRINDING MACHINE

摘要

An orifice plate with an outer grinding section and an inner grinding sectio n is disclosed. The outer grinding section is the main grinding section leading to the main material collection stream, and an additional grinding section is present in the inner section o f the orifice plate to remove useable material from material swept toward the center of the plate b y the action of a rotating knife assembly on the plate. The useable material obtained at the inner section is also led to the main material collection stream.