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High weir spiral classifier

The single spiral classifier is an up-dated one which is formed by gearing, spiral, cell body and lifting device etc. It increases an automatic sand-return device at the sand-return part. Lift ore sand that discharged at tank bottom to a proper position at tank wall, to adapt the configuration of ball mill cancelled big spoon head.

Scope of Application : Grinding auxiliary equipment for classification and grading inspection in advance, also used to contain clay minerals for washing and desliming, dehydration of pulp.

Structure

图片.png

1. Gearing    2. Spiral  3. Cell   4. Lifting Device  5. Auto sand returning device

Spiral classifier is composed of transmission mechanism, (left, right) spiral water tank, lifting device, lower support, lubricating device, ore discharge valve, feed inlet, etc

The water tank of this machine is installed obliquely. The angle of inclination is determined according to equipment configuration of equipment in the process flow. The (left, right) spirals driven by the transmission mechanism rotates in the water tank. The finely grained slurry enters the water bank from the feed inlet at one side and forms one slurry precipitation zone, whose surface area and volume depends on the value of the water tank’s inclination angle and the height of overflow edge. The spirals rotating at a low speed play a certain stirring role. After the slurry is stirred, the light and fine particles float above the surface and overflow from the overflow edge. Then they flow into the next working procedure of ore dressing. The heavy and thick particles sink into the bottom of the water tank and become return sand which is transported by the spirals to the ore discharge mouth for discharge.

 If ore grinding and classification are closed loop operation, the return sand discharged from the ore discharge mouth still goes into the mill for further grinding. Classifiers normally form closed loop operation together with mill.


Advantages

                                           1. Good adaptability

2. Easy maintenance

3. High classifier efficiency

4. Simple and reliable structure

5. High classifier production

6. easy to operate

Parameters

High weir spiral classifier

Type

Model

Specification

spiral diameter(mm)

Spiral speed(r/min)

Flume

Production capacity(t/24h)

drive motor power(kw)

lifting motor power(kw)

length(mm)

width(mm)

obliquity(°)

overflow Volume

Sand return Volume

single-screw

FG-5

Φ500

500

9.2

3900

560

10.5°-14°

21-75

145-260

3


FG-7

Φ750

750

7.8

5367

830

10.5°-14°

65-154

255-564

3


FG-10

Φ1000

1000

7

6500

1110

10.5°-14°

85

473-1026

5.5


FG-12

Φ1200

1200

5,6,7

6500

1372

10.5°-14°

150

1145-1600

5.5

2.2

FG-15

Φ1500

1500

2.5,4,6

8265

1664

14°-18.5°

235

1140-2740

7.5

2.2

FG-20

Φ2000

2000

5.4

8400

2396

14.5°-18.5°

400

5940

15

2.2

FG-24

Φ2400

2400

3.6,5.4,6.3

9160

2600

14°-18.5°

580

6800

11/15

2.2

FG-30

Φ3000

3000

3.17

12500

3200

14°-18.5°

890

11650

22

4

double-screw

2FG-12

Φ1200

1200

5,6,7

6500

2620

14°-10.5°

300

2290-3200

5.5X2

2.2X2

2FG-15

Φ1500

1500

2.5,4,6

8265

3200

14°-18.5°

460

2240-5360

7.5X2

2.2X2

2FG-20

Φ2000

2000

5.4

8400

4296

14.5°-18.5°

800

11880

15X2

2.2X2

2FG-24

Φ2400

2400

3.6,5.4,6.3

9160

5040

14°-18.5°

1160

13600

11X2/15X2

2.2X2

2FG-30

Φ3000

3000

3.17

12500

6300

14°-18.5°

1785

23300

22X2

4X2

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