Mainly due to the relative movement of the ore and the ultrafine vertical mill, the sliding friction and the pressing force are generated, thereby causing the wear of the ultrafine vertical mill.In addition, as the ore falls from the heap to the bottom, the bottom ore moves faster and receives more pressing force. According to the principle of force and reaction, the bottom of the shield is crushed by ore. The force and friction are also greater, so the bottom of the ultrafine vertical mill wears more seriously.Solutions (1) Add the bolt protection device. A 20 mm thick round boss is designed at each bolt hole location to protect the bolts. (2) Clever use of wear-resistant strip(Fig. 1). According to the wear trajectory of the material ore, add a wear-resistant strip on the panel When the heavy plate feeder is running, the space formed between the wear strips will be filled with fine ore and small ore.These small ore and the ultrafine vertical mill are relatively static, forming a protective layer of the plate, reducing the wear caused by the direct friction between the ultrafine vertical mill and the large ore, thus extending the service life of the ultrafine vertical mill.