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The coal mill is one of the important equipment in thermal power plants, and the grinding roller of the coal mill is a key component of the coal mill. Its quality, especially its wear resistance, directly affects the operating rate of powder production, coal powder quality, grinding roller consumption, and production cost. During the operation of the coal mill, the coal entering between the grinding roller and the grinding disc (cylinder) is crushed under the action of high shear force and high extrusion pressure. The phenomenon of material detachment caused by hard particles during friction belongs to abrasive wear.

The HC, HCM/100Mo (Ni, Nb), and CN-O series self-protection welding powder core wire materials developed by Beijing Saiyi Technology Co., Ltd., including the design of slag and alloy systems, wear resistance, and welding processability, are the best choices for the manufacturing and repair of coal mill roller welding.

The special materials for surface welding of Suryee S&C SSR series roller presses include transition layer, buffer layer, hard surface layer, and wear-resistant pattern layer. By combining these materials reasonably, a gradient of roller surface hardness can be formed, which can effectively ensure the service life of the roller surface.

NM-100/150 wear-resistant tape is a sleeve friendly wear resistant tape. Unlike ordinary wear-resistant materials, NM-100/150 wear-resistant belts not only have high hardness and can resist abrasive wear, but also better protect the casing during drilling and inclination, avoiding accidents caused by casing wear.

NM-400 non magnetic wear-resistant belt is a type of non-magnetic wear-resistant belt. Not only can it resist wear, but it also has weak magnetic permeability. According to the analysis and testing center of Beijing University of Science and Technology, its magnetic permeability is 1.005 (the magnetic permeability of iron is 200), which belongs to non-magnetic materials. Under the correct welding conditions, multi-layer welding can be carried out without causing blockages or cracking, with a hardness of 26-31 HRC. Can be used for wear-resistant protection and repair work of non-magnetic drill collars.