Mechanism for improving using effect of rapid magnetic turnover high-field-intensity magnetic roller

According to the mechanism for improving the using effect of the rapid magnetic turning high-field-intensity magnetic roller, the material flow positioning device is tightly attracted to the surface of the conveying belt through the high field intensity of the magnetic roller, material flow to be selected is prevented from being conveyed out of the conveying belt and out of the action range of a magnetic field, and meanwhile the material flow is adjusted according to the width of received concentrate. The installation height of the rapid magnetic turnover high-field-intensity magnetic roller is properly increased, and a stainless steel compression roller is installed between a conveying belt for conveying concentrate and the magnetic roller according to the field intensity action depth of the magnetic roller, so that the concentrate is separated from the magnetic field action in advance and is unloaded into a concentrate receiving area; according to the utility model, mineral aggregate is ensured not to devia