spiral classifier

In the ore dressing plant, the spiral classifier is used for the classifier working together with ore grinding machines to form a closed circuit, which requires use of lifting and transporting mechanism for settling sand. Such kind of classifier is also known as mechanical classifier. Actually, the process of grading is still realized by different settling velocity of particles. In addition to pre-grading and inspection grading as assistant equipment for ore grinding, mechanical classifier is sometime used for washing of ore with clay and desliming and dehydration of slurry. The mechanical classifier could be further divided into spiral classifier, plough classifier, floating chute classifier and so forth by different forms of settling sand transporting machinery. Among them, the spiral classifier is simple in construction and easy to operate and its grading chute has large inclination angle to facilitate automatic flow connection with ore grinding machine, which is thus widely applied. The spiral classifier could be also divided into high weir type and immersed type (or submerged type) by the height of liquid level. Overflow weir of high weir classifier is higher than center of the spiral shaft at the bottom end and lower than upper flange of the spiral blade. Its grading liquid level is not long so that the liquid level could directly feel stirring action of spiral blade, which is applicable to coarse grading with grading size mostly over 0.15mm. For the immersed classifier, its spiral blade at the bottom end is fully immersed under the liquid level with large grading area and stable operation, which is applicable to grading of fine particles with grading size lower than 0.15mm and features large overflow productivity. In addition, there is also a kind of low weir spiral classifier with grading liquid level lower than the spiral bearing at the lower end, which has small liquid level and large stirring action and is mainly used for washing of ores with sandstones.
spiral classifier specificaiton
Model Spiral Dia. RotateSpeed Tank  Capacity Power Weight
(mm) (r/min)  (t/24h) (kw) (t)
Length With(mm) Slope OverflowVolume ReturnSandVolume
(mm)
FG_5 500 8.5 5000 555 10-14 32 143-261 1.1 1.6
FG_7.5 750 15.5 6000 830 10-14 65 256-564 3 2.83
FG_10 1000 4.5/9.9 7000 1112 10-14 85 473-1026 5.5 4
FG_12 1200 2005-6-7 8000 1372 14-18 155 1170-1600 7.5 8.54
FG_15 1500 2.5/4/6 8500 1664 14-18 235 1140-2740 7.5 11.68
FG_20 2000 3.6/5.5 9000 2200 14-18 400 3890-5940 11 20.45
FG_24 2400 3.6/4 10000 2600 14-18 580 6800 15 25.65
2FG_12 1200 2005-6-7 8000 2600 14-18 310 2340-3200 7.5×2 15.84
2FG_15 1500 2.5/4/6 8500 3200 14-18 470 2280-5480 7.5×2 21.11
2FG_20 2000 3.6/5.5 9000 4280 14-18 800 7780-11880 11×2 36.34
2FG_24 2400 3.6/7 10000 5100 14-18 1160 13600 15×2 45.87
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