classifier machine is widely used in concentrator and ball mill with closed-circuit cycle process separation of ore sand, or used in gravity concentrator to classify ore sand and fine mud, and metal beneficiation process of pulp particle size classification, and washing operations in desliming, dehydration, and other operations. The machine has the characteristics of simple structure, reliable operation, and convenient operation.
Spiral classifiers are mainly high weir single spiral and double spiral, low weir single spiral and double spiral, sunken single spiral and double spiral classifiers, low weir type is rarely used, mainly high weir type and sunken type.
Low weir an overflow weir is lower than the spiral axis of rotation. Due to the small settlement area, this kind of classifier is only used for washing sand ore with little mud and dewatering coarse particles in actual production, and seldom used in the grinding cycle.
A high-weir overflow weir is above the rotating axis of the spiral, but below the upper edge of the spiral at the overflow end. The area of the settlement area of the classifier is lower than the weir type, and the weir height can be adjusted within a certain range, that is, the area of the settlement area can be adjusted and changed within a certain range, so as to adjust the granularity of the classification, which is a commonly used equipment in the grinding cycle.
Submerged type 1 has 4~5 spiral blades at the end of the overflow weir, all sunk in the pulp. The sedimentation area of the classifier is large, the classification pool is deep, and the spiral agitation has little influence on the pulp surface. So the grading surface is smooth, and the overflow is large and fine. In concentrator production often used as fine grinding or two - stage grinding classification equipment.
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