SU1512685A1 - Vibratory multiple-sieve screen - Google Patents

Abstract

The invention relates to a device for the separation of bulk materials by size, can be used in metallurgical, ore dressing and other areas of the national economy. The purpose of the invention is to increase the specific productivity and improve the quality of sieving. A frame 3 is supported on the frame 1 by means of vibration isolators 2. In the box 3, sieves (C) 4-7 are placed one below the other with openings increasing from lower C 4 overlying C 5-7. 3 is mounted on the exciter box 8. The lower the C 4 installed at an angle of inclination (VH) defined by the formula Α ₁ = [(ARCTG ^0,19. 10 ^-3 / D ^{_1. A. Ω. COSβ) -3} °], where D ₁ - the size of the holes With 4 m

A-amplitude of С 4, m

ω is the frequency of oscillation With 4, with ^-1

β is the angle of vibration, hail, and the UN of the next overlying C and the size of their holes are determined from the ratios Α _{I + 1} = K ₁ @ _I

L _{I + 1} = K ₂ D _I , where K ₁ = 1.8 ... 2.0

K ₂ = 1.6 ... 2.0 - denominators of geometric progressions

Α _I and D _I are, respectively, the CN and the size of the holes of the I-th C. The size of the gaps between the discharge edges above and below C is determined by the formula H _I = K ₃ D _{I + 1} , where K ₃ = 2.25 ... 2.50 is an empirical coefficient. The length of the upper C 7 is equal to 0.4 ... 0.5 of the length of the C 6 located under it, and its unloading edge has a springboard (T) 11. On the C 6 under T 11 there is a lining plate 12. Large pieces of dispersed agglomerate roll down along C 7, T 11 is tossed up and, hit on the plate 12, fraction mc. As the CNs of the lower C are gradually reduced, the residence time of the impacted material on them increases. This makes it possible to accelerate the evacuation of light coarse coarse fractions from the screening process and to increase the residence time on C of hardly demanding fine fractions of the material. 1 hp ff, 1 ill.

Description

31512

le oi, (arctg 0,19-lO / d / A-tO «xcos | i) - 3 °, where df is the size of the C 4 holes, Mj A is the C 4 oscillation amplitude, Mi Сl) is the C 4 oscillation frequency, , jb is the angle of vibration, hail, and the UN of the subsequent overlying C and the size of their holes are determined from the ratios Ni and K. (x :;, Kjd; where K 1, 8 ... 2.0 K ,, 1.6 ... 2.0 is the denominators of the geometric progressions and dj are respectively the CN and the size of the holes i-ro C. The size of the gaps between the unloading edges of the upper and lower C is determined by the formula h K, d; +, where K, , 2.25 ... 2.50 - empirical coefficient. Dpin of the upper C 7 is equal to O, 4 ... O, 5 lengths located one with 6, and its discharge edge has a springboard (T) 11. On C 6, under T 11, there is a lining plate 12 .. Large pieces of dispersed agglomerate roll down along C 7. toss T 11 and hit the plate 12, is crushed. Since the CNs of the lower C are gradually reduced, the residence time of the rattling material on them increases. 1 hp f-ly, 1 ill.

The invention relates to a device for the separation of bulk materials by size, can be used in metallurgy, ore dressing and other areas of national economy.

The purpose of the invention is to increase the specific productivity and improve the quality of sieving,

The drawing shows a vibratory multi-screen, cross-section.

The vibrating multi-pitched screen contains frame 1 supported on it through vibration insulators 2 box 3 with sieves 4–7 installed at each other with different angles of inclination to the horizon of sieves 4–7 with differently sized openings increasing from the bottom sieve 4 to the top 5 , 6 and 7. On the box 3, an exciter 8 with unbalance weights 9 is installed, supported through the vibration isolator 10 on the frame 1. The lower sieve 4 is set at an angle to the horizon determined by the formula

r3 -

G. 0.19-10. „O1

 gd-A.. (, cosfi -3j

where d. - the size of the holes of the sieve 4, m

And - the amplitude of the sieve

4, mu CO - sieve oscillation frequency 4,

3 - sieve vibration angle 4, deg.

The tilt angles of the sieves 5-7 and the size of their holes are increased, and their values are determined from geometric progressions:

five

about

.,.

0

five

oi -;., K, oi; d. Kn d,

1 1.1.

  K, d, f Kj u,

five

H-l

where K 1,8 ... 2,0; K, 1.6 ... 2.0 denominators of progressions, i.e. for sieve 5

oi K ,,, di, dl sieve 6

d g. -7

FOR sieve 7

 1- if

I The magnitudes of the gaps between;

the crocs of the upper and lower sieves are determined by the formula

h; K, d ;,

where K "2.25 ... 2.50 - empirical

coefficient,

those. the size of the gap between the sieves 4 and 5

. h, k, d, between siets 5 and 6

h, between 6 and 7

K, d ,.

The upper sieve 7 is made of a length of 0, 4 ... O, 5 of the length of the underlying sieve 6, and its discharge edge v is provided with a springboard 11. The area of the underlying sieve 6 under the springboard 11 is provided with a lining plate 12.

Vibra multisynt screen operates as follows.

For example, it is necessary to disperse the agglomerate composition,%: 0-5 mm, 24;

5-10 mm 34, 10 - 25 mm 16, +25 mm 26, according to the class + 5 mm. For this, the bottom sieve 4 is made with the size of the holes 5, mm with kinematic parameters A CO-j cos 0.25 m / s, it is set at an angle of 6 to the horizon. Accordingly, the subsequent sieves 5, b and 7 are made with openings of 10, 20 and 40 mm and set at angles to horizon 11, 20 and 36

respectively. The distance between the discharge edges of sieves 4 and 5 is 25 mm, sieves 5-6 50 mm and between sieves

6 and 7 100 mm. With a sieve length of 6 3.5 m, the sieve length is 7 1.4 m. Sieve 7 is equipped with springboard 11, and sieve 6 with lining plate 12,

When the vibrator 8 is operated, a dispersed agglomerate is fed to a multi-light rumble, while sieves less than 28 mm are sifted through a sieve 7 with a cell size of 40 mm and a tilt angle of 36, and the largest pieces of sinter roll onto it The springboard 11 and, striking the lining plate 12, are crushed and sieved through a sieve 6. A sieve 6 having a cell size of 20 mm and set at an angle of 20 rolls pieces larger than 16 mm and pieces less than 16 mm are sieved onto sieve 5. C sieve 5, having a cell size of 10 mm angle of 11 , Skatyvayuts in adreshetny product pieces agglomerate than 8 mm and sifted on a sieve 4 The pieces of less than 8 mm. With en-fa having mm calibration holes and set at an angle of 6 °, the undersize product care pieces

1512685

sinter 0-5 mm. At the same time, screening efficiency reaches 73–74% with a specific capacity of 40–42 t / hm.

Claims (2)

1. Vibrating multi-pitched screen, including frame, installed on the frame, by means of vibration isolators, a box with sieves and vibration exciters placed in it one under the other with different tilt angles; increase the specific productivity and improve the quality of sieving angle od, the slope of the lower sieve is determined from the ratio 20, L 0.19-10 d ,. A.a) -cosf -3 where d, - the size of the bottom holes sieves m 25 A - sieve amplitude, m; WITH - the oscillation frequency of the sieve, p is the vibration angle, hail, and the angles of inclination of subsequent overlying sieves and the size of their openings are determined from the ratios Ui  K ,, - d ,.  K ,, d; , 35 40 where K 1,8 ... 2,0i Kj, 1,6 ... 2,0 are the denominators of geometric progressions; d; - respectively, the angle of inclination and the size of the holes of the i-ro sieve, at the same time, the length of the upper sieve is equal to O, 4 ... O, 5 the length of the screen located under it, and the screen is equipped with an i-board located on the discharge edge of the upper sieve, and a lining plate placed on the underlying sieve under the springboard. 2. The screen according to claim 1, which differs from the fact that the magnitudes of the gaps 50 h between the discharge edges of the upper and lower screens are determined from the ratio h. K, d; 4t 55 where K is 2.25 ... 2.50 is an empirical coefficient.