The spiral classifier, also known as the sand washing machine or the spiral sand washing machine, is a classifying device by means of the difference of the solid particle size, the specific gravity, and the sedimentation speed in the liquid. It has the advantages of simple structure, reliable work, convenient operation, high efficiency and energy saving.
The classifier is widely used in the ore dressing plant to divert the ore, or to be used in the gravity ore dressing plant to classify the ore and fine mud, the slurry in the metal beneficiation process, and to remove mud and dewater in the washing operation. It can process materials such as quartz stone, gold ore, iron ore, copper ore, ore, pulp, fine mud, cement clinker, pyrrhotite, etc.
According to the number of spirals, the spiral classifier can be divided into a single spiral classifier and a double spiral classifier. The spiral classifier can be made into two types according to different procedures of the spiral blade immersed in the overflow surface of the overflow end. When the top of the spiral blade of the overflow end is higher than the overflow surface, and the spiral center of the overflow end is lower than the overflow surface, and it is mainly used for ore with an overflow particle size of 25-120 mesh; when the spiral blades at the overflow end are all immersed below the overflow surface, it is mainly suitable for ore grading with an overflow particle size of 120-200 mesh.
1. Adopting frequency conversion control technology, the classifier has simple processing, high processing efficiency and no dust pollution.
2. Compared with other classifiers, the grading wheel speed is reduced by 50% and the service life is increased by 5 to 8 times.
3. The graded granularity is fine, meeting the different needs of customers, and has a high rate of sand return.
4. The maintenance rate is low and the wear resistance is high because of steel base and body.
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