选别时间较长，回收率较高，而精矿排出端离给矿口较近，磁翻作用差，所以精矿品位较低。
Choose don't over a long period of time, high, but the concentrate recovery from the eduction is close to ore mouth, magnetic double function poor, so concentrate grade is relatively low.
液力端主要由液缸、吸入、排出阀总成、吸入、排出弹簧、吸入管、柱塞、盘根、安全阀、稳压器等部件组成。
Fluid end consists mainly of module, suction and discharge valve assembly, suction and discharge spring, suction and discharge pipe, plunger, packing, safety valve and pressure regulator, etc.
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