Spiral Classifier

As an important mineral processing equipment, FTM Spiral classifier is widely used in mineral processing field, matched with the ball mill in the closed-circuit cycle. They can be used for shunt mineral sand, classifying sand and fine mud in some gravity mills, grading the size of ore dressing pulp, as well as de-sliming and dehydration operations. It mainly uses the principle that different settling velocity in the liquid of different sizes solid materials to classify, which belongs to the mechanical classification.The spiral classifier produced by FTM mainly includes high weir single helix, high weir double helix, sunk-type single helix, and sunk-type double helix.

Characteristics 

1. The classifier adopts sealed immersed bearing, which reduces the damage of water and mineral pollution to engine body.

2. The powerful independent lifting equipment and the wear-resisting lining board with bolt mounting type can reduce abrasion and prolong the service life of spiral classifier.

3. Long narrow groove can make the best agitation effect.

4. Large enough settlement area prolongs the suspension time of the material in water.

5. The appropriate depth and area of pulp pool and helical structure can achieve the best control of classification strength.

Working Principle 

The spiral turns slowly by the motor and reducer, the chute must be installed gradient on the foundation. The obliquity that between the bottom of chute and level is 12゜~18゜30′, in overall side it forms the deposit pool. The mine slurry comes into deposit pool along the chute side. As a result of mixing by spiral, small grain floats out of liquid surface and discharges from an overall side. The big grain deposits to the bottom of chute and discharged by spiral from the sand discharging hole and comes into the ball mill to grind again. The size of obliquity will affect flooding granularity. The rotary speed of spiral will affect the flooding size.

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

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