ISSN:1000-8365 CN:61-1134/TG
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Application of High Carbon Pearlitic Steel in Large Semi-Autogenous Grinding Mill Sheel Liner
Author of the article:CHEN Zhipeng 1 , FU Xiangshang 1 , CHEN Shoufeng 1 , MA Rilai 1 , LYU Zhenlin 2
Author's Workplace:1. Jiangxi Copper Group (Dexing) Casting Co., Ltd., Dexing 334224, China; 2. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China
Key Words: large SAG mill; shell liner; abrasive wear mechanism; wear failure analysis
Abstract:The operating conditions and service environment of a large semi-auto genousgrinding (SAG) mill for copper mines were introduced in this paper. The selections of the material, microstructures and properties of the large SAG mill shell liners were also presented. The liner material is CrMoNi high carbon steel with a microstructure consisting of pearlite and second carbide, a hardness of 35~42 HRC and an impact toughness greater than or equal to 60 J/cm 2 . Combined with the optimization design of the liner structure, the service life of the liners of the large SAG mill shell for copper mines can be stabilized at 4 months, with a weight loss of 44.44%. The wear failure mechanism of a large SAG mill shell liner is determined to be that besides the abrasive cutting and fatigue wear caused by ore, corrosion wear caused by ore slurry also exists. The factors influencing the service life of the liner are also analysed, which provides a reference for the production, application and service life improvement of large SAG mill shell liners.