我们邯邢矿山局使用的60余台φ750×1800和φ600×1800半逆流永磁磁选机,在运转中经常发生圆筒筒皮保护层的破损,致使不锈钢筒皮直接和矿浆接触,加速了筒皮的磨损,筒皮一般寿命为两年左右。破损主要原因是:筒皮因磨薄强度不够而变形,造成筒皮与内部磁块摩擦;筒皮局部被磨出孔洞,矿浆进入圆筒内部。因而迫使停机更换圆筒(每个圆筒价为 We Handan mine Bureau of the use of more than 60 units φ750 × 1800 and φ600 × 1800 semi-counter-permanent magnet separator, the cylinder sheath damage occurs frequently in operation, resulting in stainless steel cylinder directly contact with the pulp, accelerated Cylinder wear, shell general life expectancy of about two years. The main reason for the damage is that the crust is deformed due to the insufficient strength of the crushing, causing the crust to rub with the inner magnetic block; the crust is partially grinded out of the hole and the pulp enters the interior of the cylinder. Thus forcing the shutdown to replace the cylinder (each cylinder price is