大型磨机内磨球的磨损分析

A Study on the Wear Characteristic of the Grinding Balls for Large Ball Mill

从磨损表面和亚表层两方面分析了大型磨机内磨球的磨损特点，结果表明，随磨球硬度增加，磨损机制由以切削机制为主向剥层或剥落（Ｓｐａｌｌｉｎｇ）机制转化，而亚表层的白层或白带是引起剥层或剥落的主要原因，对此提出大磨机内磨球硬度宜选择在５３～５８ＨＲＣ的高硬度范围。

The wear characteristic of the grinding balls used for large ball mill was studied based on the observation on the worn surface and subsurface. It is found that the wear mechanism was transited from the microcutting into the delamination or spalling when the hardness was increasing. The white layer or white band generated on subsurface caused the delamination or spalling.It is suggested that the grinding balls should treat to the hardlless between HRC53￣58.