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The Controllable Factors for the Ore Dressing Effect of Classifier

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In the ore dressing line, classifier is the auxiliary grinding equipment which is relatively important. Generally speaking, the grinding quality of ball mill can be realized by controlling the classifier. The key is to grasp the main points: the overflow weir height, the mud content or fine particles contain in the material and the density of the grading material. During the following passage, we will give the detailed introduction:

1. The overflow weir height of classifier.

The adjustment of the overflow weir height in the processing of classifier can change the size of the settlement area. When the overflow weir is high, it can make the particle sedimentation area increase. As the volume of the staging area is increased, the spiral on the pulp surface turbulence level is relatively weak, so that the overflow particle size becomes finer. But when the overflow grain size is required to be coarse, it should reduce the overflow weir height.

2. The grading of mud content or fine particles in the materials.

If the grading feeding mud content in the pulp or fine-grained level is high, the viscosity will be larger, then the mineral particles in the pulp in the settling velocity is smaller, the particle size of overflow material is rough; in this case, in order to obtain the overflow fineness in line with the requirements of the assurance, it may be appropriate to increase the fill water, so as to reduce the concentration of ore pulp. If the feeding pulp contains less mud after the desliming process, it should be appropriate to increase the concentration of the slurry, so as to reduce the return fine materials excessive entrainment in the material.

3. The density of the graded material.

If the concentration and other conditions are the same, the smaller the density of material grading, the bigger the slurry viscosity will be, the overflow product granularity coarsens; conversely, if the classified density is bigger, the pulp viscosity is smaller, the overflow particle size will becomes finer, and the returned fine grain content will increase in the material. So, when separating ores with large density, it should be appropriate to raise the grade concentration; when grading ores with small density, it is appropriate to reduce the graded density. The flat mineral particle has slower deposition than the original ore particle, so during the pulp concentration, it should accelerate the discharge speed of materials.

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