METHOD OF BALL MILL STEEL LINING SURFACE HARDENING

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to surface hardening and may be used for increasing wear resistance of ball mill lining. Ball mill is loaded with chilled iron shots at loading factor making 30-40% of mill drum inner volume. Ball mill is started at drum rpm V_d to allow shots to fall along normal to lining surface. Note here that V_d=0.75V_{d cr}, where V_{d cr} is drum rpm corresponding to shot parabolic trajectory transition of circular trajectory. Interval of shot bombardment is selected to allow twenty-fold impacts on entire surface of lining.;EFFECT: higher wear resistance.;1 dwg