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Spiral Classifier

Spiral diameter (mm): 300 - 14300
Spiral rotation speed (r/min): 3.2 - 30
Trough length (mm ≤): 3000 - 14300
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Spiral classifier is also called screw classifier. The spiral classifier is widely used in the beneficiation plant to form a closed loop with the ball mill to split the ore or to classify the ore and fine mud, grade the slurry during the spiral classifier mineral processing, and dewater in washing operations.

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Brief introduction to gravel spiral classifier

The spiral classifier belongs to the beneficiation equipment. It is mainly composed of a transmission device, a spiral body, a trough body, a lifting mechanism, a lower bearing (bearing bush) and a discharge valve. The spiral classifier can process the material like gold, sand, etc. Since the specific gravity of solid particles is different, the rate of precipitation in the liquid is different. The spiral classifier is used to treat alluvial sand ore, especially suitable for useful minerals.

The monomer has high dissociation and flatness. Spiral classifiers are mainly classified into high weir single and double spiral classifier, low weir single and double spiral classifier, and immersed single and double screw classifier. Nowadays, low weir type one is not very common, high weir type and immersed type are preferable.

The spiral classifier is widely used in the concentrating plant to be equipped with a ball mill to form a closed-loop cycle split ore, or used in the gravity ore dressing plant to classify ore and fine mud, to grade size of the slurry in the metal beneficiation process, and the deliming and dewatering operations in the washing operation. The gravel spiral classifier has the characteristics of simple structure, reliable operation and convenient operation.

Spiral classifier

Applied fields of screw classifier

1.Superfine classifying of various powder materials; impurities removal; scattering.

2.Classify the superfine powder and nanometer powder with coarse particle; classify the viscous materials, with high adhesiveness, difficult to separate and low rate of mobility.

Working principle of the spiral classifier

The classifier is based on the principle that the solid particle size is different and the specific gravity is different, so the sedimentation velocity in the liquid is different. Fine ore spill out of the water, and the coarse ore particles will be sank to the bottom of the tank and finally pushed up by the screw.

It can filter the powder ground in the ball mill. The coarse material is screwed into the mill feed port by the spiral rotary vane, and the filtered fine material is discharged from the overflow pipe. The base of the machine is made of channel steel, and the body is welded by steel plate. The screw shaft has a water inlet head, a shaft head, and a pig iron sleeve. It is wear-resistant and durable. The lifting device is divided into electric and manual.
Working

Working principle of the spiral classifier

Advantages of Fote spiral classifier

1.Low energy consumption: compared with a vertical spiral classifier, the horizontal spiral classifier can reduce by 50% energy consumption under the same processing quantity.

2.High efficiency: compared with vertical and horizontal type screw classifier, working efficiency can improve by 50% under the same processing quantity.

3.High precision: high degree classifying rate to eradicate there are too large particle and screening residue in the final product

4.High productivity: productivity of the large type of machine can reach to 50t/h.

5.Abundant structure: according to different special demands, there is a special classifying structure.

6.It can create the closed-cycle or open-cycle system with ball mill, Raymond mill, impact mill, airflow mill, and other equipment.

7.Negative pressure production: no powder pollution and do good for the environment.

8.High automatic; stable operation, easy to operate.

Spiral classifier production site

Spiral Classifier Technical Parameter

Model Spiral 
Diameter
(mm)
Trough 
Length
(mm)
Spiral 
rotate 
speed
(r/min)
Processing 
capacity(t/d)
Motor 
Power
(kw)
Dimensions
(mm≤)
Total 
weight
(t)
Sand
-return
Overflow For 
driving
For 
lifting 
Length Width Height
FG-3 300 3000 12-30 80-150 20 1.1 ---- 3850 490 1140 0.7
FG-5 500 4500 8-12.5 135-210 32 1.1 ---- 5430 680 1480 1.9
FG-7 750 5500 6-10 340-570 65 3 ---- 6720 980 1820 3.1
FG-10 1000 6500 5-8 675-1080 110 5.5 ---- 7590 1240 2380 4.9
FC-10 8400 675-1080 85 7.5 ---- 9600 1240 2680 6.2
FG-12 1200 6500 4-6 1170-1870 155 7.5 2.2 8180 1570 3110 8.5
FC-12 8400 1170-1870 120 7.5 2.2 10370 1540 3920 11.0
2FG-12 6500 2340-3740 310 15 4.4 8230 2790 3110 15.8
2FC-12 8400 2340-3740 240 15 4.4 10370 2790 3920 17.6
FG-15 1500 8300 4-6 1830-2740 235 7.5 2.2 10410 1880 4080 12.5
FC-15 10500 1830-2740 185 7.5 2.2 12670 1820 4890 16.8
2FG-15 8300 2280-5480 470 15 4.4 10410 3390 4080 22.1
2FC-15 10500 2280-5480 370 15 4.4 12670 3370 4890 30.7
FG-20 2000 8400 3.6-5.5 3290-5940 400 11-15 3 10790 2530 4490 20.5
FC-20 12900 3210-5940 320 11-15 3 15610 2530 5340 28.5
2FG-20 8400 7780-11880 800 22-30 6 11000 4600 4490 35.5
2FC-20 12900 7780-11880 640 22-30 6 15760 4600 5640 48.7
FG-24 2400 9130 3.67 6800 580 15 3 11650 2910 4970 26.8
FC-24 14130 6800 490 18.5 4 16580 2930 7190 41.0
2FG-24 9130 13600 1160 30 6 12710 5430 5690 45.8
2FC-24 14130 13700 910 37 8 17710 5430 8000 67.9
2FG-30 3000 12500 3.2 23300 1785 40 8 16020 6640 6350 73.0
2FC-30 14300 23300 1410 ---- ---- 17091 ---- 8680 84.8
Model Spiral 
Diameter
(mm)
Spiral 
rotate 
speed
(r/min)
FG-3 300 12-30
FG-5 500 8-12.5
FG-7 750 6-10
FG-10 1000 5-8
FC-10
FG-12 1200 4-6
FC-12
2FG-12
2FC-12
FG-15 1500 4-6
FC-15
2FG-15
2FC-15
FG-20 2000 3.6-5.5
FC-20
2FG-20
2FC-20
FG-24 2400 3.67
FC-24
2FG-24
2FC-24
2FG-30 3000 3.2
2FC-30

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