Spiral classifier

According to the position of the spiral in the groove and the height of the slurry surface, it can be divided into three types: low-lying type, high-lying type and submerged type.

The low-lying one overflows below the axis of rotation of the spiral. Due to the small area of ​​the sedimentation area, the classifier is only used for rinsing the dewatering of sandstone and coarse particles with little mud, and is rarely used in the grinding cycle.

The sorghum-type overflow weir is higher than the axis of rotation of the spiral but lower than the upper edge of the helix of the overflow end. The classifier has a lower area of ​​the settling zone and a larger 堰 type, and the height of the settling zone can be adjusted within a certain range, that is, the area of ​​the settling zone can be adjusted and changed within a certain range, thereby adjusting the granularity of the classification, which is in the grinding cycle. A commonly used device.

The sunken type has 4 to 5 spiral leaves at the overflow end, all of which are sunk in the slurry. The classification area of ​​the classifier is large, the classification tank is deep, and the agitation of the spiral has little influence on the surface of the slurry. Therefore, the graded surface is stable and the overflow is large and thin. In beneficiation plant often used as fine grinding or milling ore grading equipment Sec.