Summary：Recent years, with the rapid development of metallurgy, construction, chemical and some other industries, Raymond mill also gets wider applications in these fields. Raymond mill is mainly for grinding the raw materials into required sized powder.

Recent years, with the rapid development of metallurgy, construction, chemical and some other industries, Raymond mill also gets wider applications in these fields. Raymond mill is mainly for grinding the raw materials into required sized powder. But in the operation process of Raymond mill, there are several factors that will affect its main body damage. Here, we mainly talk about these factors.

Effect Of Grinding Material Hardness

The hardness of grinding material has greatly influence on the damage of material. The influence degree mainly shows from the ratio of hardness of material and hardness of grinding material. With the change of ratio, the wear mechanism of material will also change.

Effect Of Shape& Size Of Grinding Material

Shape (sharpness) of grinding material also has obvious influence on the damage of main body. Compared with river sand, the newly crushed quartz rock sand has more serious damage to the material. The shapes of various grinding materials are very difficult to measure and differentiate. Generally, we can divide the grinding materials into 3 kinds: sharp shape, polygon shape and round-blunt shape. When the hardness is fixed, grinding materials with sharp shape has the most serious damage to material, followed by polygon shaped grinding materials, and round-blunt shaped grinding materials. The size of grinding material also has influence on the damage of material. When the size of grinding material is smaller than the critical size, the damage of material will increase sharply with the increasing of the grinding material size.

Effect Of Material Mechanical Properties

The mechanical properties of material that have effect on the damage of material are: elastic modulus, macro hardness and surface hardness, strength, ductility and fracture toughness etc. Heat treatment will not change the elastic modulus of steel, but it will greatly improve the abrasion resistance of steel. And different steels with different components have same hardness after heat treatment, but the abrasion resistances are different.