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目前选矿厂的 设备利用率,在很 大程度上取决于磨 矿设备的工作可靠性。因检修磨机而造成停机时间占计划停机总时间的60～80％,其中主要是更换衬板。 在其它国家的生产实践中,采用含铬、钼、镍、钨等其它元素的合金作为自磨机的衬板。通常易磨损的衬板部件是提升板、卸料格栅,采用铬钼钢,其中含钼0.3～0.4％、铬2.0～2.5％,其硬度为350～450HB。为了提高自磨机衬板的使用寿命,苏联研制了一种90×2M铬钼钢,并进行正火回火、回火
At present, the equipment utilization of the concentrator largely depends on the reliability of the work of the grinding equipment. Downtime due to overhaul of the mill accounts for 60-80% of the total scheduled downtime, with the main change being liner replacement. In other countries, the production practice, the use of chromium, molybdenum, nickel, tungsten and other elements of the alloy as a self-mill liner. Often wear parts of the lining plate is a lifting plate, discharge grille, the use of chromium-molybdenum steel, which contains 0.3 to 0.4% molybdenum, chromium 2.0 to 2.5%, the hardness of 350 ~ 450HB. In order to improve the life of the mill liner, the Soviet Union developed a 90 × 2M chromium molybdenum steel, and normalizing tempering, tempering