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Spiral separator

Classifier(Classifiers): One type of Ore spiral classifier in China is Spiral Classifier. For an optimum system, Classifier is essential because the maximum amount of product is recovered from the grinding mill discharge at the required size, and the fine particles adhering to the coarse particle are effectively washed clear from this stream.

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Spiral Classifier is widely used for classifying all kinds of mineral according to the particle size in the mineral processing flow, and is also applicable for de-sliming and dehydrating in the mineral washing work. Generally, Classifier forms a closed process flow with ball mill. The classifier has the advantages of scientific structure, reliable working stability, and convenient operation, etc.
Working Theory of Spiral Classifier
The Spiral Classifier depends on different deposition speed of solid particle due to their size difference and weight difference. Thin mineral particle can float in the water and flow out, while the coarse mineral particle will deposit into the bottom of the cell, which is pushed up by screw and discharged. Classifier is a kind of mechanical classifying equipment. Classifier can filtrate the powdery materials grinded by ball mill, transport the coarse materials into inlet with screw, and discharge the filtrated fine materials through overflow pipe.
Operating Principle of Air Classifiers
The airflow of Air Classifiers conveys the material from below between the external and internal envelope and subsequently reaches the upper part of the separator. The air passes through the blades of Screw Classifiers, which are regulated from the outside of the separator assume a rotary motion and entering the central cone.
With the centrifugal effect in Air Classifiers, the coarse Particles [the heavier ones] are accumulated on the bottom of central cone and are then conveyed through a suitable pipe. The fine grade of the material is transported by the air leaving the Separator of Screw Classifiers and is adjustable within very ample limits by operating manually on the inclination of the blades.

The term spiral separator can refer to either a device for separating slurry components by density, or for a device for sorting particles by shape. Here, these are termed wet and dry spiral separators, respectively.

Classifier(Classifiers):One type of Ore spiral classifier in China spiral classifier.For an optimum system, Classifier is essential that the maximum amount of product is recovered from the grinding mill discharge at the required size, and that fine particles that adhere to the coarse particle returns are effectively washed clear from this stream.

Spiral separator(Screw classifier):Wet Spiral Separators Spiral separators of the wet type, also called spiral concentrators, are devices to separate solid components in a slurry, based upon a combination of the solid particle density as well as the particle's hydrodynamic properties (e.g. drag). The device consists of a tower, around which is wound a sluice, from which slots or channels are placed in the base of the sluice to extract solid particles that have come out of suspension.

Typical Spiral separator concentrators will use a slurry from about 20%-40% solids by weight, with a particle size somewhere between 1.5-.075mm (17-340 mesh), though somewhat larger particle sizes are sometimes used. For good separation, the density difference between the heavy minerals and the light minerals in the feedstock should be at least 1 g/cm3 ; and because the separation is dependent upon size and density, spiral separators are most effective at purifying ore if its particles are of uniform size and shape. A spiral separator may process a couple tons per hour of ore, per flight, and multiple flights may be stacked in the same space as one, to improve capacity.

Model	Spiral diameter (mm)	Spiral rotation speed (r/min)	Trough length (mm<=)	Motor power(kw<=)		Dimensions(mm<=)			Weight (t)
Model	Spiral diameter (mm)	Spiral rotation speed (r/min)	Trough length (mm<=)	For driving	For lifting	Len-gth	Width	Height	<=
FG-3	300	12-30	3000	1.1	----	3850	490	1140	0.7
FG-5	500	8-12.5	4500	1.1	----	5430	680	1480	1.9
FG-7	750	6-10	5500	3	----	6720	980	1820	3.1
FG-10	1000	5-8	6500	5.5	----	7590	1240	2380	4.9
FC-10	1000	5-8	8400	7.5	----	9600	1240	2680	6.2
FG-12	1200	4-6	6500	7.5	2.2	8180	1570	3110	8.5
FC-12			8400	7.5	2.2	10370	1540	3920	11.0
2FG-12			6500	15	4.4	8230	2790	3110	15.8
2Fc-12			8400	15	4.4	10370	2790	3920	17.6
FG-15	1500	4-6	8300	7.5	2.2	10410	1880	4080	12.5
FC-15			10500	7.5	2.2	12670	1820	4890	16.8
2FG-15			8300	15	4.4	10410	3390	4080	22.1
2FC-15			10500	15	4.4	12670	3370	4890	30.7
FG-20	2000	3.6-5.5	8400	11-15	3	10790	2530	4490	20.5
FC-20			12900	11-15	3	15610	2530	5340	28.5
2FG-20			8400	22-30	6	11000	4600	4490	35.5
2FC-20			12900	22-30	6	15760	4600	5640	48.7
FG-24	2400	3.67	9130	15	3	11650	2910	4970	26.8
FC-24			14130	18.5	4	16580	2930	7190	41.0
2FG-24			9130	30	6	12710	5430	5690	45.8
2FC-24			14130	37	8	17710	5430	8000	67.9
2FG-30	3000	3.2	12500	40	8	16020	6640	6350	73.0
2FC-30	3000	3.2	14300	---	---	17091	---	8680	84.8

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