Advantages of fine grained dry magnetic separator

In 1965, we designed and manufactured wet type permanent magnet separator using strontium ferrite as material, and got success in the Bengang Nanfen ore beneficiation plant. It got to spread and application soon, and realized weak magnetic separator permanent magnetization and serialization. At the same time, electro magnetic separator and 128-c3 belt type weak magnetic separator introduced from the original Soviet Union had gradually become obsolete. The permanent magnetic weak magnet separator played a dominant role.
There are several advantages of fine-grained dry magnetic separator equipment of weak magnetic field. For example, the process is simple and does not consume water, which saves dehydration, concentration and filtration operations. Therefore the investment and cost is low and the plant area is small. However, the drawback is that technical indicators are sometimes low, especially with the rising demand for environmental protection, dust pollution caused by dry separator is difficult to drawn. Therefore, since the 1970s, the application of fine dry low intensity magnetic separator machine has became less and less, which is gradually replaced by wet low intensity magnetic separator machine. At present, the fine dry low intensity magnetic separator machine is used only for the concentrator in the dry and cold areas. However, as an important equipment for throwing tailings in the concentrator, the large piece of ore dry-type permanent magnetic separator (magnetic pulley) continues to promote the use which plays an important role for the concentrating mills' energy saving.
 The impeller flotation machine and the rod wheeled flotation machine have common features, both inhaling the air with the help of the high-speed rotation of the impeller (or rod wheel) at the bottom of the flotation cells. The structure of the impeller (rod) determines the aeration of the ore pulp, mixing degree as well as the dispersion degree of the bubbles. As far as the impeller flotation machine is concerned, its aeration quantity is big, but the gap between the impeller and the cover board changes due to the abrasion that severely impinges on the aeration quantity and decreases the separating indexes. In terms of the structure and performance, rod type flotation machine is superior to the impeller type flotation machine. However, the inhalation slot is complex and the aqueduct body is shallow. Therefore the gravity connection is difficult.

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