Grinding of mill rolls by providing grinding wheel comprising abrasive grain, phenolic resin bond, specific volume porosity, maximum cured density, and burst speed

摘要

Mill rolls are ground by providing a grinding wheel comprising abrasive grains and a phenolic resin binder with a porosity of 36-54 vol.%, a maximum cured density of 2.0 g/cm3 and a burst speed of at least 6000 sfpm. - Grinding mill rolls, comprises providing a grinding wheel comprising: - (1) abrasive grains and a phenolic resin binder with a porosity of 36-54 vol.%, a maximum cured density of 2.0 g/cm3 and a burst speed of at least 6000 sfpm; - (2) mounting the wheel on a roll grinding machine; - (3) bringing the wheel into contact with a rotating mill roll with a cylindrical surface; - (4) traversing the wheel across the surface of the mill roll, maintaining continuous contact of the wheel with the surface of the mill roll; and - (5) grinding the surface of the mill roll to a surface finish value of 10-50 Ra, while leaving the surface free of feed lines, chatter marks and surface irregularities.