The "rising belly" of ball mill is closely related to grinding concentration, and the grinding concentration is directly related to the ore feeding quantity. The concentration is too large or too small will adversely influence the normal work of ball mill. The concentration is too large, the flow velocity, and the grinding medium (steel ball) the impact of weak. The overflow type ball mill, the discharge concentration may thicken; while the lattice type ball mill may appear bloated phenomenon, the cause of mine installed on Xinhai mill "Rose belly" and solutions of detailed analysis.

The cause of "bulge" is mainly caused by the increase of ore volume and the change of water quantity (water pressure decrease) and the sharp increase of grinding concentration. The sound becomes dull, cannot hear the steel ball to bump the sound, the observation ammeter can see the current drop, explained that the electric machine does work at this time minimum, the ball mill has lost the grinding effect. If not promptly adjust quickly, the cylinder material will give mine belched out from the mill (commonly known as lean pull) caused by metal loss.

"Bulging" phenomenon, the operator should not panic. To turn off the feeder, stop feeding, will open the rear proper water mill, reduce the proper discharge of water, the overflow concentration. Put up, the purpose is to reduce the amount of return mines, reducing mill load. After careful treatment and adjustment, generally about half an hour will be able to return to normal, individual serious still longer. When found ore discharge ore concentration becomes thin, ore volume gradually less, you can hear the sound of steel ball impact liner; observe the ammeter can be found to restore current normal, these phenomena are said bulge belly has been resolved. At this time, you can restore ore and other operating conditions, so that the ball mill work properly.

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