The Phase 1 and 2 concentrators of Inner Mongolia Mining Company adopt closed ore storage bin,and the materials in the ore storage bin are transported to semi-autogenous mill by heavy plate feeder.The ore bin hopper of heavy plate feeder is supplemented by square steel welding to improve hopper wear resistance.With the increasing production capacity,the hopper liner wears too fast,shortening the service life,so the liner is modified.The instructions,working conditions and wear resistance characteristics of the liner are analyzed in detail,and the material and structure of the liner are optimized according to various influence factors:the welding direction of square steel is changed so that it is perpendicular to the ore direction;square liner is adopted;the connection shifts from welding to bolting.The field practice shows that the service life and maintenance efficiency of the modified liner are greatly improved,and the production cost is obviously reduced.