Roll assemblies including superhard inserts, high pressure grinder roll apparatuses using same, and methods of use

摘要

Embodiments of the invention are directed to roll assemblies configured to exhibit improved wear resistance of stud elements. Accordingly, the roll assemblies of may improve and/or increase the useful life of high pressure grinding roll apparatuses. In an embodiment, one or more stud elements may include superhard material, which may provide superior wear resistance characteristics and may increase the useful life of the rolls assemblies and high pressure grinding roll apparatuses.

主权项

1. A roll assembly for reducing size of a stock material, the roll assembly comprising:
a roll body having an outer surface and having a plurality of recesses in the outer surface; and a plurality of superhard stud elements each of which is positioned inside a corresponding one of the plurality of recesses and brazed to the roll body, at least some of the plurality of superhard stud elements projecting outwardly from the outer surface of the roll body, the at least some of the plurality of superhard stud elements including:
a tungsten carbide substrate; anda polycrystalline diamond table bonded to the tungsten carbide substrate, the polycrystalline diamond table including a convex working surface;wherein the convex working surfaces of the at least some of the plurality of superhard stud elements at least partially define a crushing exterior of the roll assembly; and a plurality of tungsten carbide stud elements secured to the roll body and at least partially defining the crushing exterior, each of the plurality of tungsten carbide stud elements including a tungsten carbide working surface at least some of the plurality of tungsten stud elements projecting outwardly from the outer surface of the roll body.