'A FABRICATION PROCESS TO PRODUCE HIGH STRENGTH AND WEAR RESISTANCE GRINDING ROLLS AND BULL RING SEGMENTS FOR BOWL MILL WITH ENHANCED PERFORMANCE AND OPERATIONAL LIFE'

摘要

The invention relates to a process of producing high strength wear resistance hard faced spheroidal graphite (SG) cast for grinding rolls and bull ring segments for bowl mills in Pulveriser with enhanced performance and higher operational life comprising the steps of manufacturing spheroidal graphite (SG) grinding roll in a centrifugal casting machine; casting SG iron bull ring segments (BRS) in a CO2 sand Moulding, the microstructure of the SG iron component being essentially ferritic and having 90% of type I or type II graphite as per ASTM A 247 plate I; providing a hard facing metal and blending to a particle size range of 45-100 microns; providing a binder and mixing with the blended hard facing metal to produce a coating; and coating the SG grinding roll and SG iron bull ring segments by one of the thermal spraying or plasma transferred arc welding process.