CN215387761U

CN215387761U - Feeding device capable of restraining slurry feeding disturbance

Info

Publication number: CN215387761U
Application number: CN202121058760.XU
Authority: CN
Inventors: 杨晓军; 徐修平; 华绍广; 刘龙; 于先坤; 夏向伟
Original assignee: Sinosteel Maanshan General Institute of Mining Research Co Ltd
Current assignee: Sinosteel Maanshan General Institute of Mining Research Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2022-01-04
Anticipated expiration: 2031-05-18

Abstract

The utility model discloses a feeding device capable of inhibiting slurry feeding disturbance, which comprises a tailing slurry feeding pipe (6), a guide cylinder (2.1) and an overflow cylinder (2.3), wherein the upper part of the guide cylinder (2.1) is connected with the tailing slurry feeding pipe (6) through a connecting flange (2.9); the middle lower part of the guide cylinder (2.1) is positioned in the overflow cylinder (2.3), the lower end of the guide cylinder (2.1) is connected with the overflow cylinder bottom plate (2.4) by welding, and the guide cylinder (2.1) and the overflow cylinder (2.3) are coaxially arranged; the side wall of the lower part of the guide cylinder (2.1) is uniformly provided with a plurality of slotted holes to form a guide groove (2.2); the outer side of the upper edge of the overflow cylinder (2.3) is welded with an overflow sieve plate (2.6), the overflow sieve plate (2.6) is provided with an overflow sieve hole (2.7), and the outer edge of the overflow sieve plate (2.6) is provided with an overflow cofferdam (2.8). The utility model can eliminate the impact of tailing slurry feeding on tailing slurry in the sand silo, eliminate air bubbles in the tailing slurry and has the advantage of uniform feeding.

Description

Feeding device capable of restraining slurry feeding disturbance

Technical Field

The utility model relates to a slurry feeding device, which is particularly suitable for uniformly feeding tailing slurry in tailing concentration and dehydration links.

Background

The tailing slurry produced by mineral separation has low concentration, can not be directly used for filling, needs to be subjected to precipitation concentration, and the precipitation concentration equipment generally adopts a vertical flow sedimentation tank, also called a sand silo. At present, tailing slurry of a sand silo cylinder or a deep cone thickener of a mine generally enters a central cylinder from the tangential direction of the central cylinder wall, flows along the direction of the cylinder wall after entering the central cylinder, accelerates the sedimentation of partial particles by using the rotational flow principle, changes the flow direction of the tailing slurry and reduces the disturbance of feeding to the tailing slurry in the cylinder; or the tailing slurry is fed from the lower part of the liquid surface, the tailing slurry feeding pipe passes through the wall of the sand silo cylinder and the wall of the central cylinder from the lower part of the liquid surface, the discharge port is positioned at the axis of the central cylinder, the direction of the discharge port is upward, and the tailing slurry flows upward, so that the disturbance of the tailing slurry feeding to the tailing slurry and the sedimentation layer below is reduced. The flocculating agent is added or dispersedly added to the surface layer of the tailing slurry of the central cylinder through a mixer on the feeding pipe. The central cylinder is formed by welding a steel plate rolled into a barrel with a certain diameter, the bottom of the central cylinder is provided with a conical reflecting plate which is welded and connected through a lead screw or round steel, tailing slurry enters the central cylinder and then descends, flows out from a gap between the reflecting plate and the central cylinder, and then slowly flows upwards from a gap between the central cylinder and the sand silo until the tailing slurry overflows the sand silo. However, in the prior art, the problems of large feeding disturbance and uneven feeding of tailing pulp exist when the conventional sand silo cylinder or deep cone thickener of the mine is used for concentrating tailings.

Disclosure of Invention

The utility model provides a feeding device capable of inhibiting slurry feeding disturbance, aiming at the problems of large feeding disturbance and uneven feeding of the existing mine tailing slurry feeding device.

In order to achieve the above purpose of the present invention, the feeding device capable of suppressing slurry feeding disturbance of the present invention adopts the following technical scheme:

the feeding device capable of inhibiting slurry feeding disturbance comprises a guide cylinder and an overflow cylinder, wherein the upper part of the guide cylinder is connected with a tailing slurry feeding pipe through a connecting flange and used for changing the feeding direction of tailing slurry and eliminating the impulse of the tailing slurry, and the tailing slurry enters the overflow cylinder through the guide cylinder; the middle lower part of the guide cylinder is positioned in the overflow cylinder, the lower end of the guide cylinder is connected with the bottom plate of the overflow cylinder by welding, and the guide cylinder and the overflow cylinder are coaxially arranged; the side wall of the lower part of the guide cylinder is uniformly provided with a plurality of slotted holes to form a guide groove, the total area of the openings of the guide groove is more than or equal to 1.5 times of the sectional area of the tailing slurry feeding pipe, and the sectional area of the overflow cylinder is more than or equal to 2.5 times of the sectional area of the tailing slurry feeding pipe; the outer side of the upper edge of the overflow cylinder is welded with an overflow sieve plate, an overflow sieve hole is formed in the overflow sieve plate, and an overflow cofferdam is arranged on the outer edge of the overflow sieve plate. The overflow cylinder is used for overflowing tailing slurry to enter the sand silo cylinder body, the tailing slurry enters the overflow cylinder through the slotted hole in the side wall of the guide cylinder and overflows to the overflow sieve plate, a large number of overflow sieve holes are formed in the overflow sieve plate, slurry freely falls down from the overflow sieve holes, and the slurry overflows through the overflow weir and falls down in addition, so that the impact of tailing slurry feeding on the slurry in the central cylinder is greatly reduced.

In addition, a bottom plate leakage hole with the diameter more than or equal to 30mm is also formed in the bottom plate of the overflow cylinder.

Preferably, the conical surface of the flow guide cone is provided with holes with the diameter of more than or equal to 40mm, and the total area of the holes is more than or equal to 5 times of the sectional area of the tailing slurry feeding pipe.

Preferably, the total area of the openings of the diversion trench is more than or equal to 2 times of the sectional area of the tailing slurry feeding pipe; the sectional area of the overflow cylinder is more than or equal to 3.0 times of the sectional area of the tailing slurry feeding pipe; the total area of the openings of the bottom plate leak holes formed in the bottom plate of the overflow cylinder is 1-2 times of the sectional area of the tailing slurry feeding pipe, and the sectional area of a ring formed by the overflow cylinder and the guide cylinder is more than or equal to 2 times of the total area of the openings of the guide grooves. The design of the structural parameters can ensure the normal transportation of the slurry, eliminate the impact of tailing slurry feeding on tailing slurry in the sand silo cylinder and inhibit the disturbance of the slurry.

Preferably, the height of the overflow cofferdam is 50-200 mm; the overflow sieve plate is provided with circular holes with the diameter larger than or equal to 20mm, the diameter of each overflow sieve hole is preferably 30-60 mm, and the distance between every two adjacent overflow sieve holes is 30-50 mm.

After the feeding device capable of inhibiting slurry feeding disturbance adopts the technical scheme, the feeding device has the following positive effects:

(1) the novel feeding device for inhibiting slurry feeding disturbance is designed to eliminate the impact of tailing slurry feeding on tailing slurry in a sand silo, eliminate air bubbles in the tailing slurry and reduce the attached facilities of the sand silo;

(2) a large number of round holes or grooves are formed in the diversion cone, so that the sand setting amount of the center of the sand silo barrel can be increased, the water leakage time of the center of the sedimentation layer can be delayed, the sand setting on the diversion cone can be reduced, and the load of the diversion cone is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a feeding device capable of suppressing slurry feed disturbance according to the present invention.

The reference signs are: 2-a feeding device for suppressing slurry feeding disturbance; 2.1-a guide shell; 2.2-diversion trench; 2.3-overflow cylinder; 2.4-overflow cylinder bottom plate; 2.5-bottom plate leak holes; 2.6-overflow sieve plate; 2.7-overflow sieve holes; 2.8-overflow cofferdam; 2.9-attachment flange; 6-tailing slurry feeding pipe.

Detailed Description

To better describe the present invention, a feeding device capable of suppressing slurry feed disturbance according to the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the feeding device 2 for suppressing slurry feeding disturbance of the present invention includes a guide cylinder 2.1 and an overflow cylinder 2.3, and the upper part of the guide cylinder 2.1 is connected to a tailing slurry feeding pipe 6 through a connecting flange 2.9; the middle lower part of the guide cylinder 2.1 is positioned in the overflow cylinder 2.3, the lower end of the guide cylinder 2.1 is connected with the overflow cylinder bottom plate 2.4 by welding, and the guide cylinder 2.1 and the overflow cylinder 2.3 are coaxially arranged; the side wall of the lower part of the guide cylinder 2.1 is uniformly provided with a plurality of slotted holes with the width of more than or equal to 10mm and the length of more than or equal to 200mm to form a guide groove 2.2, the total area of the openings of the guide groove 2.2 is more than or equal to 2 times of the sectional area of the tailing slurry feeding pipe 6, and the sectional area of the overflow cylinder 2.3 is more than or equal to 2.5 times of the sectional area of the tailing slurry feeding pipe 6; an overflow sieve plate 2.6 is welded on the outer side of the upper edge of the overflow cylinder 2.3, and the outer diameter of the overflow sieve plate 2.6 is 2-10 times of the inner diameter; the overflow sieve plate 2.6 is provided with overflow sieve holes 2.7, the overflow sieve holes 2.7 are round holes with the diameter of 30-60 mm, and the distance between every two adjacent overflow sieve holes 2.7 is 30-50 mm; and an overflow cofferdam 2.8 with the height of 50-200 mm is arranged at the outer edge of the overflow sieve plate 2.6. The sectional area of the overflow cylinder 2.3 is more than or equal to 3.0 times of the sectional area of the tailing slurry feeding pipe 6; the total opening area of a bottom plate leak hole 2.5 formed in the bottom plate 2.4 of the overflow cylinder is 1-2 times of the sectional area of the tailing slurry feeding pipe 6, and the sectional area of a circular ring formed by the overflow cylinder 2.3 and the guide cylinder 2.1 is more than or equal to 2 times of the total opening area of the guide groove 2.2. After tailing slurry enters the feeding device 2 for inhibiting slurry feeding disturbance, the tailing slurry can enter the overflow cylinder 2.3 through the guide cylinder 2.1 side wall guide groove 2.2 due to blocking of the overflow cylinder bottom plate 2.4, part of tailing slurry can flow out from the bottom plate leakage hole 2.5 and directly enters the central cylinder 3, the rest tailing slurry overflows to the overflow sieve plate 2.6 through the overflow cylinder 2.3, part of tailing slurry falls into the central cylinder 3 through the overflow sieve plate hole 2.7, and the rest tailing slurry falls into the central cylinder 3 through the overflow weir 2.8.

Claims

1. A feeder device capable of suppressing slurry feed disturbance, comprising a tailing slurry feed pipe (6), characterized in that: the device also comprises a guide shell (2.1) and an overflow shell (2.3), wherein the upper part of the guide shell (2.1) is connected with a tailing slurry feeding pipe (6) through a connecting flange (2.9); the middle lower part of the guide cylinder (2.1) is positioned in the overflow cylinder (2.3), the lower end of the guide cylinder (2.1) is connected with the overflow cylinder bottom plate (2.4) by welding, and the guide cylinder (2.1) and the overflow cylinder (2.3) are coaxially arranged; the side wall of the lower part of the guide cylinder (2.1) is uniformly provided with a plurality of slotted holes to form a guide groove (2.2); the outer side of the upper edge of the overflow cylinder (2.3) is welded with an overflow sieve plate (2.6), the overflow sieve plate (2.6) is provided with an overflow sieve hole (2.7), and the outer edge of the overflow sieve plate (2.6) is provided with an overflow cofferdam (2.8).

2. A feeding device capable of suppressing disturbance of a slurry feed as claimed in claim 1, wherein: a bottom plate leak hole (2.5) with the diameter more than or equal to 30mm is arranged on the bottom plate (2.4) of the overflow cylinder.

3. A feeding device capable of suppressing slurry feed disturbance as claimed in claim 1 or 2, wherein: the height of the overflow cofferdam (2.8) is 50-200 mm; the overflow sieve plates (2.6) are provided with circular holes with the diameter of more than or equal to 20mm, and the distance between every two adjacent overflow sieve holes (2.7) is 30-50 mm.