The basis for selecting the hydrocyclone is: 1 the volume of slurry required to be treated Q (m3/h); 2 the graded particle size (or the maximum size of the overflow) d (mm). First, the diameter D of the cyclone is determined based on Q and d. Generally, when the overflow is relatively thick and the production capacity is large, a large-sized cyclone is selected, and a small-sized cyclone is used instead. When the required production capacity is large and the overflow is very fine, a small-sized cyclone can be used in parallel to form a cyclone group. Select the diameter D of the cyclone, refer to Table 26. Table 26 Relationship between diameter D of hydrocyclone and production capacity Q and separation particle size d

Cyclone diameter D (mm)

Average production capacity Q (m 3 /h)

Overflow maximum particle size d (mm)

Remarks

50

1.5 to 3.5

0 ~ 0.050

Feed pressure

P=9.8×10 4 Pa

75

2.5 to 7.5

0.010 ~ 0.060

125

7.5 to 15

0.013 to 0.080

150

12 to 20

0.019 to 0.085

200

18 to 30

0.027 ~ 0.124

250

25 to 50

0.032 to 0.125

300

45 to 65

0.037 ~ 0.150

350

60 to 90

0.044 to 0.180

500

90 to 180

0.052 ~ 0.240

700

200 to 400

0.074 ~ 0.340

1000

350 to 600

0.074 ~ 0.400

Secondly, according to the determined cyclone diameter (D), select its structural parameters: overflow pipe diameter (d overflow), grit diameter (d sink), feed caliber (d give), cylinder height (H) , overflow pipe insertion depth (h), cone angle (a)

It can be calculated in the following order:

d overflow = (0.2 ~ 0.4) D

d sink = (0.2 ~ 0.7) d overflow

d gives = (0.4 ~ 1.0) d overflow

H=(0.7~1.6)D

h=(0.5~0.8)H

a = 10 ° ~ 45 ° (large values ​​in the classification of coarse particles, small values ​​in fine particles).

When selecting the above parameters, combined with the technical specifications listed in the hydrocyclone catalogue, the size of the cyclone is finally determined.

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