SU1282896A1 - Multiproduct hydraulic classifier - Google Patents

Abstract

The invention relates to the field of mineral processing and makes it possible to speed up the process and improve the quality of classification of mineral resources. For this purpose, in the chamber (K) 1, above the level of the discharge windows 3, there are packs of plates (P) 4 arranged at an angle of 45-60 to the horizontal. The edges of the P 4 and accelerator 6 pulp, located in K 1 below the windows 3, are made in horizontal planes. On the lower unloading window, 8 K 1 is fitted with an additional K 10 with discharge pipes 11 and 12. In 1514. i (o

Description

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To 10 an arc sieve 9 is placed, attached to the window 8. The mixture enters K 1 through the pressure pipe 7. Large particles (H) of the first fraction of the mixture settle and through window 8 with a certain amount of liquid flow into the sieve 9. dewatering large H, which are discharged through pipe 11. Small H are discharged through pipe 12. Small H that did not fall out in the first fraction

day, rush to the first row of accelerators 6, pass through them, and rush up to the gap between P 4. The larger of H accumulate; on P 4. A layer H of the second fraction of the mixture is formed between accelerator 6 and P 4 package which is removed through the window 3 and the pipe 13. 13. A similar layer of the third fraction of the mixture is removed through the window 3 and the pipe 14. 1 C. f-ly, 2 ill.

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The invention relates to the enrichment and classification of minerals, namely, the design of a multiproduct hydraulic classification system for the separation of granular materials by size, and can be used in the mineral processing industry MFR5, in the industry of nonmetallic building materials, in the chemical and other industries. x industry.

The aim of the invention is a process of ycj and an improved quality of slurry classification.

1 shows a product hydraulic classifier, a longitudinal section; figure 2 - section aa in figure 1. .

The multi-product hydraulic classifier contains a chamber t in the form of an upwardly tapering cone, supported on a steel frame of a welded structure 2. Chamber 1 is above the level of the unloading windows 3, plates 4 are inserted with longitudinal ribs 5, and the packages are inclined ... 1 with respect to the horizontal planes at an angle which varies in the range of 45-60

Accelerators 6 are placed below the discharge OICOH, between the side surfaces of which there is a stream with accelerated movement of the flax.

All edges of the plate and pulp accelerators are located in horizontal planes. This ensures uniformity of the velocity field both at the inlet and at the outlet of the plates and accelerators, which significantly improves the quality of separation of the solid component of the slurry.

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At the bottom of the camera 1 is placed. slurry pipe 7 and even lower along the material flow - discharge port 8, to which arc sieve 9 is attached, placed in an additional chamber 10 with Two outlet pipes for coarse 11 and fine 12 separation products. The discharge ports 3 located on the side walls of the chamber are connected to branch pipes 13 for discharging separation products. On top of the classifier ends up with a chute or pipe 14. Regulating valves (taps) 15 are installed on the pipes 13 and 14.

Multi-product hydraulic classifier works as follows.

The initial mixture through the pressure pipeline 7 enters the lower part of chamber 1, where by increasing the cross-sectional area there occurs a partial decrease in the flow rate and the largest particles of the solid component (first fraction) settle and through the discharge window 8 along with some amount of fluid. step onto the arc screen 9, where the enrichment (removal of fine fractions) and dehydration of the largest product, which is removed through the pipe 11, and the smaller fraction together with the water is removed the drain pipe 12.

Smaller particles rush upward along with the flow and enter the first row of pulp accelerators. All particles that fall into the zone of action of the accelerators rush upward and upon leaving the accelerators their speed sharply decreases with the expansion of the slurry stream, which slows down the movement of the largest particles of the solid component to the speed of the slurry. Smaller particles rush upward along with the flow and enter the gaps between the plates 4, where particles larger than the boundary grain of separation separate to the inclined surfaces of the plates and form into a thin wall layer, which under the action of gravity gradually slips back into chamber 1 Thus, a concentrated fluidized bed is formed between the pulp accelerators 6 and the package of the inclined plates 4, consisting of particles of the solid component of the second fraction, which is continuously removed through the discharge port 3 and the felling 13.

When leaving the first package of inclined plates, the process repeats, and through the second discharge port 3 particles of the solid component of the third fraction enter the pipe 13 and the gap between them in the packages is determined by the ratio:

AT . , d, L p

where L is the length of the plates in the package;

In - the gap between them;

 - grain size of the boundary grain;

And - the empirical coefficient. Thus, by installing the required number of accelerators and plate packs in chamber 1, you can get the required number of granular material fractions.

After the granular material is fully classified, the remaining liquid is removed from chamber 1 through a drainage chute or pipe 14.

The classification process is regulated by means of elec- trozadvizhek (or cranes) installed on the pipes 13 and 14. The process can be automated with the help of sensors installed on the pipes 13 and 14, through which ready, products and drains are removed.

Claims (2)

1. Multi-product hydraulic classifier, including a chamber made in the form of a large base upward cone with discharge windows located on its side surface, a drainage chute, a slurry pipe and pulp accelerators located in the chamber below the discharge window levels, characterized in that speeding up the process and improving the quality of the classification; it is provided with packages located under the angle to the horizontal and higher levels of the discharge windows of the plates and an additional chamber with retraction conductive pipes installed therein and arcuate sieve, wherein edges of the plates and accelerators pulp are arranged in horizontal planes, and the additional camera is fixed to the bottom during the movement of the material discharge window. 2. A classifier according to claim 1, characterized in that the inclination angle of the plates is 45-60. FIG. 2