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Grinding Rod
Grinding rods are used as the grinding medium in the rod mill. During the service process, the regularly arranged grinding rods work in a cascading manner. Through the self-built impact and rolling of the grinding rods, the minerals located in the gaps are ground to a qualified At the same time, the grinding rod is worn by minerals, wears out continuously, and the size becomes smaller, and is drawn out of the mill after being smaller than a certain size.
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Grinding rods are used as the grinding medium in the rod mill. During the service process, the regularly arranged grinding rods work in a cascading manner. Through the self-built impact and rolling of the grinding rods, the minerals located in the gaps are ground to a qualified At the same time, the grinding rod is worn by minerals, wears out continuously, and the size becomes smaller, and is drawn out of the mill after being smaller than a certain size. During the actual operation of the rod mill, the grinding rod is continuously impacted, and when its toughness is insufficient, it is prone to rod breaking accidents. Once broken rods occur, the regular arrangement of other grinding rods in the mill will be destroyed, resulting in disordered rods and more broken rods. Therefore, the occurrence of broken rods will not only seriously affect the grinding efficiency, but also cause damage to the equipment, resulting in parking. Seriously affect the normal production and operation of the mine.
The production of grinding rods is usually carried out by means of medium frequency induction heating and then heat treatment. At present, the commonly used grinding rod materials in the market are mainly 40Cr, 42CrMo and other commonly used die steels, which have good toughness and are not easy to break the rod, but for larger grinding rods, the hardened layer is very shallow, only 8- 10mm, it shows poor wear resistance in the grinding process, and other materials such as 65Mn have the same effect. Japanese scholars proposed to use high-carbon steel as the material of wear-resistant steel rods, which has a better effect, but has strict requirements on the production process of steel mills, and high-carbon steel is prone to metallurgical defects. In view of the fact that there are few suitable materials for grinding rods, Goldpro has developed a new type of steel for grinding rods and a supporting heat treatment process to maintain the high toughness of the grinding rods while increasing the depth of the hardened layer. The mine has been used, and there is no broken rod accident, and the wear is low, and the grinding effect is remarkable.
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