SU1461494A1 - Thin-layer settling tank - Google Patents

Abstract

The invention relates to a technique for the hydraulic classification of solid suspended particles with a particle size of 0-3 mm, namely, to thin-layer apparatus used in mineral processing plants in the mining industry. The purpose of the invention is to increase the efficiency of the classification process and the performance of a thin-layer clarifier. The thin-layer settling tank is equipped with inclined plates, a receiving pocket, inclined and horizontal dividing partitions, feeding and sludge-removal channels (CC) located respectively at the crests and troughs of the plates, with openings in the supply channels, bounded above by the fairings attached to the bottom of the vertical walls , pockets for discharge of clarified liquid, sludge discharger, as well as additional feeding channels (DC). which are placed in the sludge-removal channels along the axis of the troughs of the undulating plates and connected to the receiving pocket inlet openings equipped with gates for adjusting the particle separation size. In the upper part of the CC, a suspended layer is formed, which retains large particles contained in the sludge water of the upflows from the DC. This makes it possible to increase the load on the sludge settling tank and improve the efficiency of sludge classification. 5 il. with (L

Description

The invention relates to a technique for the hydraulic classification of suspended particles by size under the action of gravity in a thin layer and can be used in coal preparation and ore dressing plants.

The purpose of this is to increase the efficiency of the classification process and the performance of the thin-layer clarifier.

FIG. 1 shows the proposed thin layer settler, a vertical section; in fig. 2 shows section A-A in FIG. I; in fig. 3 shows a section BB in FIG. one; in fig. 4 is a view of B in FIG. one; in fig. 5 - device, axonometrics.

The sump contains bath 1, which has a rectangular shape at the top, and in

the lower part is a pyramid, a receiving pocket 2, an inclined divider 3 with a horizontal partition 4, an inclined wall 5, to the lower part of which is adjacent a vertical wall 6 with rounded fairings 7, installed respectively above the inlets 8 of the feeding channels 9, which They are parallel to the sludge outlet channels 10. These channels are separated by longitudinal vertical walls 11, and in the end part, on the opposite side of the feed supply, are blocked by a blank wall 12. In the bottom s part of the longitudinal vertical walls and adjacent the entire length of the inclined sheets 13. Above the feed and Oi shlamo4

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diverting channels 9 and 10 are installed at an angle wavy plate 14. In this case, the crests of the waves of plates 14 are located above the supply channels 9, and the troughs of the waves - above the sludge-removing channels 10. Inside the channels 10 there are additional supply channels 15 formed by longitudinal vertical by partitions 16 and connected to the receiving pocket 2 by the entrance holes between the vertical walls 11 and the longitudinal vertical partitions 16, where they are collected in the pyramidal part of the bath 1 and then released from the classifier through the device 27. In the meeting zone of concentrated streams coming from the plates and upward streams of slurry water, additional supply channels 15, i.e., in the upper part of the drainage channels 10,

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These 17. These holes can overlap the expanded layer. This layer is covered with hooks 18, which are placed to hold large particles containing --- - - - c in upstream sludge

from the additional supply channels 15;

The formation of a suspended layer contributes to

in the guides 19. Shieber 18 have fairings 20, holes 21 for ease of movement and holes 22, through which fixing screws 23, 15 pass through the reduction of velocity of silt water, which are screwed into the stops 24.

channels 15, due to the expansion of the flow and the drop in its pressure. This makes it possible to increase the load on the settling tank through the silt water and thereby increase it.

The sump works as follows. 20 performance.

Amount of sludge feed

Initial feed in the form of slurry water is fed into the receiving pocket 2 and

The sump also has support beams 25, a pocket 26 for collecting and draining the drain, a device 27 for adjusting the amount of large slit being produced.

in the additional supply channels 15 depends on the size of the separation of solid particles. The higher the separation size,

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horizontal partition 4 through the bore-, 5, the amount of sludge water must be fed 8 and 17, smoothly rounding the curvature more. Quantity control

the feed water is produced by changing the size of the hole 17 by lowering or raising the sponge 18. For this

Tbie the spaces on the crests of the waves of the plates 30, place the gate 18 in the position corresponding to 14. As the slurry water advances to one of the holes 22 and fix the gate again with the help of the indicated screw. .

The proposed design allows to increase the efficiency of slam classification.

 26 and in the form of a drain, 35 (particles of a particle size of 0-1 mm) are withdrawn due to the limits of the classifier. Large particles, reducing clogging of large slimes with fine particles by 40-50% and increase

an inclined partition wall 3 with a horizontal partition 4 through the holes 8 and 17, smoothly bending round the rounded fairings 7 and 20, is directed into the supply channels 9 and into the additional supply channels 15. From the supply channels 9 water enters the interplate, large particles are emitted from it, and smaller particles are retained in this water, which forms in a horizontal flow, pours into the car, also part of the small particles are deposited on the surface of the plates 14, slide into the troughs of the waves and are concentrated in them on TV At the beginning of the KOTOpbie, at the entrance to the KOTOpbie, there are rising flows of sludge water from the additional feeding channels 15. As a result, leaching occurs

40

performance on the original power by 20-25%.

Claims (1)

Invention Formula Thin-bed settler according to ed. St. No. 1223955, characterized in that, with    to improve process efficiency small particles turned out to be with. The large .5 classifications and productivity, of upstream slurry streams, is provided with longitudinal vertical transfers and their return to inter-plate-towns located in the slime-and-dump space, from which the large channels under the depressions of the undulating plates and forming additional feed channels, the inlets Matter of these particles will go to the drain. Large particles pass through the zone of action. the ascending streams and enter the lower 50s are connected to the receiving pocket of the numerical part of the classifier through the aisles and are equipped with drawers. between the vertical walls 11 and the longitudinal vertical partitions 16, where they are collected in the pyramidal part of the bath 1 and then released from the classifier through the device 27. In the meeting area of concentrated streams coming from the plates and the upward flows of slurry water additional feed channels 15, i.e. in the upper part of the cladding channels 10, occurs education vozveschennogo layer. This layer retains large particles containing additional supply channels 15; The formation of a suspended layer contributes to   reducing the velocity of the slurry water leaving the additional feed 40 performance on the original power by 20-25%. Invention Formula . IB initial patanai 2 U MS Fi8.1 27 Large LU / fCC.M Bs Z3 Fi 14 22 nineteen go 15 Sediment Weighted MoFe Zone.5 nineteen Type B 18 2324 14 ge one one Fig.Ch