subject: Rod Mill Used For Molybdenum Ore Dressing [print this page] The particle size of the grinding products crushed by molybdenum ore dressing equipment ball mill is relatively small. With same equipment specifications, the ball mill production capacity is relatively small, the grinding process had crushed serious, the grinding efficiency is also significantly lower; However, due to the abuse of flow-type ball mill structure, inexpensive, and is suitable for fine grinding equipment, overflow ball mill has been widely used in the production practice the same.
Compared with molybdenum ore dressing equipment ball mill, rod mill grinding media are steel bars, so there is a clear difference in the operating characteristics . As the milling balls are point contact, while the steel bars for the line of contact so that between steel bar, the folder particles, coarse particles are first broken, and fine particles by a degree of protection. On the other hand, when the steel bars along the cylinder wall is moving upward, sandwiched between the steel bars of fine particles in the outflow from the gap, so that the coarse particles concentrated by the impact of broken steel bars falling. It is because of the rod mill of this unique role of selective crushing of coarse particles, and makes this grinding equipment, uniform product granularity, and less grinding process over crushed phenomenon, and thus the rod mill often open. In addition, the surface area of the medium per unit volume of the steel bars is smaller than the ball media, so the rod mill utilization factor is lower than the same tube diameter ball mill, and is not suitable for fine grinding equipment.
In general, rod mill productivity is than about 15% lower with the same specifications of the lattice-type ball mill. Than about 5% lower with the specifications of the overflow ball mill. These characteristics of the rod mill decided it suitable for tungsten ore, tin ore and other brittle materials, grinding equipment. Improve the recovery rate of the sorting operation to alleviate the crushing phenomenon. In addition, the rod mill can also be used for coarse grinding equipment in the two grinding circuit, especially when dealing with brittle materials. The rod mill is often replaced by crushing the crusher. To solve the congestion problems of the nesting population of crushing equipment. In production, the transfer rate of the rod mill is generally between 50% -65%.
