Grinding ring for flour mill

An outwear of a flour mill is composed of a metal internal layer and a metal external layer, which have different performances. The external layer is machine worked soft surface formation metal, while the internal layer is anti-friction metal. The silicon-manganese outwear of the traditional flour mill 50 is replaced by the utility model, so that the purpose of easy processing and cost reduction are achieved. By using the utility model, the machine processing expense of water gap and riser head removal and cutting can be saved, and the manufacturing cost is reduced for 80% to 90%. The worries brought by poor quality causing unqualified grinding material, seriously low benefit and large expense, are solved by the utility model with good quality.