Analysis of out-of-round and eccentric wear of Grinding Media Balls (1)

1. The hardness of the steel ball is uneven. The hardness of the steel ball is the key to the normal operation of the ball mill. The hardness determines the relationship between the level of the grinding rate and the production cost. The surface hardness of the steel ball appears high on one side and low on the other during the testing process. This phenomenon is mainly in production. Caused by the process: one is that more than three balls enter the quenching equipment together during the heat treatment and quenching, and the heat dissipation is affected; the second is that the temperature is insufficient during the tempering process and the stress is not fully released, resulting in uneven hardness distribution; steel balls Based on the experience of these years, I concluded that the core hardness of the steel ball should conform to the six-character guideline-uniform, symmetrical, and stable.

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