Classifier

Classifier is widely used in the concentrator and ball mill dubbed closed-circuit cycle split shunt ore, or in the gravity concentrator to grade ore and fine mud, and metal beneficiation process of ore slurry grading, and washing operations In the mud, dehydration and other operations. The machine has a simple structure, reliable, easy to operate and so on.

Spiral classifier mainly has high weir single helix and double helix, low weir single helix and double helix, submerged single helix and double helix several classifier, low weir is now used very little, mainly high weir type and Sinking.

Weir - weir below the axis of rotation of the spiral. This classifier due to the settlement area is small, the actual production is only used for washing less mud and coarse sediment dehydration, rarely used in the grinding cycle.

High Weir - The weir is above the axis of rotation of the helix, but below the upper edge of the overflow end helix. This kind of grader has a large area of its subsidence area and its weir height can be adjusted within a certain range. That is, the area of the subsidence area can be adjusted and adjusted within a certain range so that the graded granularity can be adjusted, A commonly used equipment.

Sunken - 4 to 5 spiral lobes on the weir, all sunk in the slurry. The classifier settler area larger, deep pool grading, spiral agitation on the pulp surface less affected. So grading surface smooth, overflow large and fine. In the concentrator production is often used as fine grinding or grinding equipment grading equipment.

Spiral classifier working principle:

Spiral classifier is based on the principle of different solid particle size, different specific gravity, and thus the settling velocity in the liquid, fine mineral particles floating in the water into the overflow, coarse ore particles sink in the bottom of the tank. By the spiral push to the upper part of the discharge, to a mechanical grading of a grading equipment, grinding mill can be graded level in the filter, and then use the coarse material rotary screw spin into the mill inlet, the filter The fines discharged from the overflow pipe. The machine base with channel steel, the body welded steel plate. Screw into the water head, shaft head, the use of pig iron sets, durable wear, lifting device sub-electric and manual two.

Spiral classifier groove width and processing capacity relationship:

The width of the groove has a great influence on the discharge speed and discharge volume of the overflow product, and the width of the channel is larger than the discharge speed of the overflow. Therefore, the possibility that the coarse particles are discharged with the overflow also increases. On the other hand, however, the wider the trough, the greater the settlement area of the ore and the easy settlement. So the width of the tank on the grading effect is not big, but will affect the grading machine's processing power are closely related. The width of the tank is large, processing capacity is large; the other hand, the handling capacity is small. Therefore, the classifier tank width should be adapted to the size of the mill capacity.

Spiral classifier structure:

Classifier mainly by the transmission, spiral body, tank body, lifting agencies, the lower bearing (bearing) and drainage valve composition.