Rod mill overview

The wet rod mill can be divided into three types: overflow type, open type and peripheral type according to the discharge type, and the overflow type is mainly used. The dry rod mill adopts the wind discharging method, but the grinding machine is generally not produced in China.
The structure of the overflow type rod mill is basically the same as that of the overflow type ball mill (below). The difference is that the tapered end cover of the rod mill has a small curvature, the inner side is provided with a smooth lining, and the barrel is generally not smooth. Lining; the diameter of the hollow shaft of the mine is large. The purpose is to enable the steel rod to move regularly in the mill without skewing, so that it does not hit and bend when falling; the larger diameter of the discharge port is for the purpose of loading the rod and inspecting and inspecting it, and also Reduce the level of the slurry so that the slurry can be quickly discharged.
Figure ( http:// )
The speed of the rod mill is low, the general speed is 60%~70%; the medium filling rate is also low, about 35%~40%. The grain size of the ore is generally 25~30mm. If the steel bar is too skewed, the steel bar will be bent and broken during operation. At the same time, the nugget will be too large, and there will be a large gap between the rod and the rod, which is not easy to grind to fine particles. Production has fallen. The ore is crushed and ground by the "line contact" when the steel rod falls. Before the large piece is ground, the fine particles are rarely punched by the rod, so the over-grinding phenomenon is less, and the product granularity is relatively uniform, generally 1~ 3mm. Therefore, the rod mill is suitable for fine and coarse grinding of ore in the first stage of open grinding, and is particularly suitable for treating brittle materials.

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