CN215352136U - Vertical sand silo suitable for concentration and dehydration of tailings - Google Patents

Abstract

The utility model discloses a vertical sand silo suitable for concentrating and dewatering tailings, which comprises a sand silo cylinder body (4), a central cylinder (3), a tailing slurry feeding pipe (6), a flocculating agent adding device (1) and a feeding disturbance inhibiting device (2), wherein the central cylinder (3) is vertically arranged in the center of the sand silo cylinder body (4) through a support (7), an overflow groove (5) is arranged on the outer edge of the upper opening of the sand silo cylinder body (4), and the feeding disturbance inhibiting device (2) is arranged on the upper part in the central cylinder (3). The flocculant adding device (1) comprises a flocculant feeding main pipe (1.1), a flocculant feeding branch pipe (1.2) and a flocculant spraying pipe, wherein the flocculant spraying pipe is immersed below the liquid level of the slurry; the feeding disturbance restraining device comprises a guide cylinder and an overflow cylinder. The utility model has the advantages of simple and convenient manufacture, installation and maintenance, adjustable settling time, small flocculant dosage, high flocculation efficiency and the like, and is particularly suitable for concentration, precipitation and solid-liquid separation of tailings in mines.

Description

Vertical sand silo suitable for concentration and dehydration of tailings

Technical Field

The utility model belongs to the technical field of solid-liquid separation, and particularly relates to a sedimentation concentration device for slurry, which is particularly suitable for concentration, precipitation and solid-liquid separation of tailings in mines.

Background

With the stricter requirements of the nation on safety production and mine environment protection, the filling mining method becomes the most important method for underground mining, and is being popularized from high-value ore deposits to general metal mines and even non-metal mines.

The filling mining is to mix and stir waste rocks generated by mining, tailings generated by mineral separation and a cementing material according to a certain proportion, and convey the mixture to a goaf left by the filling mining through a pipeline. 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. Tailing slurry generated by mineral separation flows in from the top of the sand silo, tailings are precipitated and concentrated in the sand silo, supernatant is discharged through overflow of the top of the sand silo, and the tailings are discharged through a bottom sand discharge pipe after being compressed and precipitated to prepare slurry for filling. The sand silo utilizes the density difference between tailings and water to settle, tailing slurry enters the central cylinder, water and tailings flow out of the bottom of the central cylinder, water flow carries fine tailings to move upwards from a gap between the central cylinder and the inner wall of the sand silo, the direction of the water flow is opposite to the direction of precipitation of tailing particles, the tailing particles with the settling velocity equal to the rising velocity of the water flow are suspended in the tailing slurry to form a layer of suspension layer, and the suspension layer intercepts and filters the rising particles, so that the sand silo has higher settling efficiency. The sedimentation velocity of tailing particles with certain density in water is related to the particle size, the sedimentation velocity of particles with smaller particle size is smaller, when the sedimentation velocity of the particles is smaller than the rising velocity of water flow, the particles with the particle size and the particle size below the particle size can not be precipitated, and therefore, a flocculating agent needs to be added, and the tailing pulp can be completely precipitated through flocculation precipitation. However, in the prior art, the problems of large tailing slurry feeding disturbance, nonuniform flocculating agent feeding and the like still exist when the conventional sand silo cylinder or deep cone thickener of the mine is used for tailing concentration.

Disclosure of Invention

Aiming at the problems of the sand silo cylinder or the deep cone thickener adopted in the existing mine, the utility model provides the vertical sand silo which is simple and convenient to manufacture, install and maintain, can adjust the settling time, has less flocculant consumption and high flocculation efficiency and is suitable for concentrating and dewatering tailings.

In order to realize the purpose, the vertical sand silo suitable for concentrating and dehydrating the tailings adopts the following technical scheme:

the utility model relates to a vertical sand silo suitable for concentrating and dewatering tailings, which comprises a sand silo cylinder, a central cylinder and a tailing slurry feeding pipe, wherein the central cylinder is vertically arranged in the center of the sand silo cylinder through a bracket, and an overflow chute is arranged at the outer edge of the upper opening of the sand silo cylinder, and is characterized in that: it also comprises a flocculating agent adding device and a feeding disturbance inhibiting device, wherein the feeding disturbance inhibiting device is arranged at the upper part in the central cylinder.

The flocculant adding device comprises a flocculant feeding main pipe, flocculant feeding branch pipes and flocculant spraying pipes, wherein the flocculant feeding main pipe is an annular pipe/polygonal pipe, the flocculant feeding main pipe is arranged at the upper part of the sand silo cylinder and surrounds the periphery of the central cylinder, the flocculant feeding main pipe is used for conveying flocculant to be added and has the function of fixing the whole flocculant adding device, the flocculant feeding branch pipes are vertically communicated with the flocculant feeding main pipe through vertical connecting pipes, the included angle between every two adjacent flocculant feeding branch pipes is in the range of 30-90 degrees, the flocculant spraying pipes are arranged on each flocculant feeding branch pipe at intervals, and the flocculant feeding branch pipes are hung on a support at the top of the sand silo cylinder through hanging rods; the flocculant spray pipe is immersed below the liquid level of the slurry.

The device for inhibiting the feeding disturbance comprises a guide cylinder and an overflow cylinder, wherein the upper part of the guide cylinder is connected with a tailing pulp feeding pipe through a connecting flange and is used for changing the feeding direction of tailing pulp and eliminating the impulse of the tailing pulp, and the tailing pulp 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 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.

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.

The central cylinder comprises sectional cylinders and a diversion cone, the sectional cylinders are connected into a vertical cylinder through cylinder connecting flanges, the tail end of the sectional cylinder at the lowest part is provided with an end connecting flange, and the end connecting flange is connected with the diversion cone through a connecting rod; the flow guide cone is a conical top, the cone angle is 120-160 degrees, and a hole with the diameter being more than or equal to 40mm is formed in the conical surface of the flow guide cone; the gap between the diversion cone and the segmented cylinder at the lowest part is 300-500 mm.

Preferably, the rows of the flocculant spraying pipes distributed on each flocculant feeding branch pipe are 2-6, and the flocculant spraying pipes are distributed at equal intervals and are vertical to the flocculant feeding branch pipes; and holes with the diameter of 3-10 mm are horizontally or vertically downwards opened on the flocculant spraying pipe every 50-200 mm, and the flocculant feeding branch pipe and the end of the flocculant spraying pipe are closed. In the arrangement structure, the spray pipes with the same spacing form an annular or polygonal closed structure by taking the center of the sand bin cylinder as the center of a circle, and the multilayer flocculant adding rings are formed by different closed radiuses.

Preferably, the conical surface of the guide cone is provided with a hole with the diameter being more than or equal to 40 mm.

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.

Preferably, the height of each sectional cylinder is 500 to 2000 mm.

The vertical sand silo suitable for concentrating and dehydrating tailings has the following positive effects after adopting the technical scheme:

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

(2) a novel flocculating agent adding device is designed, a flocculating agent is added under multi-point liquid and is uniformly mixed with overflow water, and the flocculating efficiency is improved and the using amount of the flocculating agent is reduced by adjusting the depth under the liquid and adjusting the retention time;

(3) the central cylinder is made of corrosion-resistant and light-weight nonmetal materials in equal-diameter sections, the weight is light, each section is connected through a connecting flange, the manufacture, the installation and the replacement are simple and convenient, and the length of the central cylinder is adjusted by increasing or decreasing the number of the sections;

(4) 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 vertical sand silo suitable for concentrating and dewatering tailings;

FIG. 2 is a schematic plan view of a flocculant adding apparatus used in the present invention;

FIG. 3 is a schematic view of a feed disturbance suppression device used in the present invention;

fig. 4 is a schematic view of an adjustable central cartridge body structure employed in the present invention.

The reference signs are: 1-a flocculant adding device; 1.0-suspension rod; 1.1-a main flocculant feed pipe; 1.2-flocculant feed manifold; 1.3-flocculant spray pipe; 2-a feed disturbance suppression device; 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; 3-a central cylinder; 3.1-sectional cylinder; 3.2-flow guiding cone; 3.3-connecting rod; 3.4-cylinder connecting flange; 3.5-installing a handle; 3.6-end connection flange; 4-sand silo cylinder; 5-an overflow trough; 6-tailing slurry feeding pipe; 7-bracket.

Detailed Description

In order to better describe the utility model, the following provides a vertical sand silo suitable for concentrating and dewatering tailings, which is described in further detail with reference to the attached drawings.

As shown in fig. 1, the vertical sand silo for concentrating and dewatering tailings according to the present invention is a structural schematic diagram of a vertical sand silo suitable for concentrating and dewatering tailings, and is seen by combining fig. 2, fig. 3 and fig. 4, the vertical sand silo suitable for concentrating and dewatering tailings according to the present invention comprises a sand silo cylinder 4, a central cylinder 3, a tailing slurry feeding pipe 6, a flocculant adding device 1 and a feeding disturbance inhibiting device 2, wherein the central cylinder 3 is vertically installed in the center of the sand silo cylinder 4 through a support 7, an overflow groove 5 is arranged on the outer edge of the upper opening of the sand silo cylinder 4, the feeding disturbance inhibiting device 2 is installed on the upper portion inside the central cylinder 3, and the flocculant adding device 1 is installed on the upper portion of the sand silo cylinder 4 and is located between the central cylinder 3 and the inner wall of the sand silo cylinder 4.

As shown in a schematic plane structure diagram of a flocculant adding device adopted by the utility model shown in fig. 2 and combined with fig. 1, the flocculant adding device 1 comprises a flocculant feeding main pipe 1.1, flocculant feeding branch pipes 1.2 and flocculant spraying pipes 1.3, wherein the flocculant feeding main pipe 1.1 is a polygonal pipe, the flocculant feeding main pipe 1.1 is arranged at the upper part of a sand silo cylinder 4 and surrounds the periphery of a central cylinder 3, the flocculant feeding branch pipes 1.2 are vertically communicated with the flocculant feeding main pipe 1.1 through vertical connecting pipes, an included angle between the adjacent flocculant feeding branch pipes 1.2 is in a range of 40-60 degrees, 2-6 rows of flocculant spraying pipes 1.3 are arranged at equal intervals on each flocculant feeding branch pipe 1.2, the row pitch is generally 500-2000 mm, the flocculant spraying pipes 1.3 are mutually vertical to the flocculant feeding branch pipes 1.2, and are horizontally arranged under the flocculant feeding branch pipes 1.2; horizontally or vertically opening holes with the diameter of 3-10 mm on the flocculant spraying pipe 1.3 every 50-200 mm, and sealing the end heads of the flocculant feeding branch pipe 1.2 and the flocculant spraying pipe 1.3; the flocculant feeding branch pipe 1.2 is hung on a bracket 7 at the top of the sand silo cylinder 4 through a hanging rod 1.0; the flocculating agent spray pipe 1.3 is immersed into the slurry 100-500 mm below the liquid level.

As shown in fig. 3, which is a schematic structural diagram of the feeding disturbance suppression device adopted by the present invention and is combined with fig. 1, the feeding disturbance suppression device 2 includes a guide shell 2.1 and an overflow shell 2.3, and 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 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 the tailing slurry enters the device 2 for inhibiting feeding disturbance, the tailing slurry can enter the overflow cylinder 2.3 through the diversion trench 2.2 on the side wall of the diversion cylinder 2.1 due to the blocking of the bottom plate 2.4 of the overflow cylinder, part of the tailing slurry can flow out from the leakage hole 2.5 of the bottom plate 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 the 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.

As shown in the schematic structural diagram of the adjustable central cylinder body adopted by the utility model shown in fig. 4, the central cylinder 3 comprises a sectional cylinder body 3.1 and a diversion cone 3.2, and mounting handles 3.5 are arranged on the inner wall of the central cylinder 3 at intervals from top to bottom; the height of each sectional cylinder body 3.1 is 500-2000 mm, and the material of each sectional cylinder body 3.1 is PP, ABS or PVC polymer anticorrosive material; the horizontal included angle of the diversion cone 3.2 is 17 degrees, a circular hole with the diameter of 80-100 mm is formed at the top point of the diversion cone 3.2, a hole with the diameter of 40-80 mm is formed in the conical surface of the diversion cone 3.2, and the total area of the opening is more than or equal to 5 times of the sectional area of the tailing slurry feeding pipe 6 but not more than 20% of the surface area of the diversion cone 3.2; the sectional cylinder bodies 3.1 are connected into a vertical cylinder through cylinder body connecting flanges 3.4, the tail end of the sectional cylinder body 3.1 at the lowest part is provided with an end part connecting flange 3.6, and the end part connecting flange 3.6 is connected with a flow guide cone 3.2 through a connecting rod 3.3; the guide cone 3.2 is a cone top, the cone angle is 120-160 degrees, holes with the diameter being more than or equal to 40mm are formed in the conical surface of the guide cone 3.2, and the total area of the holes is not more than 30% of the surface area of the conical surface of the guide cone 3.2; the gap between the diversion cone 3.2 and the segmented cylinder 3.1 at the lowest part is 300-500 mm. The flow rate of tailing slurry in the central barrel 3 is less than or equal to 30mm/s, tailing slurry overflowing into the central barrel 3 through the feeding disturbance inhibiting device 2 slowly flows downwards along the central barrel 3, after encountering the diversion cone 3.2, one part of tailing slurry flows into the lower part of the diversion cone 3.2 through the opening of the diversion cone 3.2, the other part of tailing slurry flows into a rising area between the inner wall of the sand silo barrel 4 and the central barrel 3 through a gap between the diversion cone 3.2 and the bottom section subsection barrel 3.1, coarse particles settle down, and particles which do not settle overflow upwards along with water.

Claims (5)

1. The utility model provides a be suitable for vertical sand silo of tailing concentrated dehydration usefulness contains sand silo barrel (4), a center section of thick bamboo (3), tailing thick liquid inlet pipe (6), and center section of thick bamboo (3) are through the vertical central authorities of installing in sand silo barrel (4) of support (7), are equipped with overflow launder (5), its characterized in that in sand silo barrel (4) suitable for mouthful outer fringe: the device also comprises a flocculating agent adding device (1) and a feeding disturbance inhibiting device (2), wherein the feeding disturbance inhibiting device (2) is arranged at the upper part in the central cylinder (3);

the flocculant adding device (1) comprises a flocculant feeding main pipe (1.1), flocculant feeding branch pipes (1.2) and flocculant spraying pipes (1.3), wherein the flocculant feeding main pipe (1.1) is an annular pipe/polygonal pipe, the flocculant feeding main pipe (1.1) is installed on the upper part of a sand silo cylinder body (4) and surrounds the periphery of a central cylinder (3), the flocculant feeding branch pipes (1.2) are vertically communicated with the flocculant feeding main pipe (1.1) through vertical connecting pipes, the included angle between every two adjacent flocculant feeding branch pipes (1.2) ranges from 30 degrees to 90 degrees, the flocculant spraying pipes (1.3) are arranged on each flocculant feeding branch pipe (1.2) at intervals, and the flocculant feeding branch pipes (1.2) are hung on a support (7) at the top of the sand silo cylinder body (4) through hanging rods (1.0); the flocculant spray pipe (1.3) is immersed below the liquid level of the slurry;

the device for inhibiting the feeding disturbance (2) comprises a guide cylinder (2.1) and an overflow cylinder (2.3), wherein the upper part of the guide cylinder (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. The vertical sand silo for concentrating and dewatering tailings as claimed in claim 1, wherein: the central cylinder (3) comprises sectional cylinders (3.1) and a diversion cone (3.2), the sectional cylinders (3.1) are connected into a vertical cylinder through cylinder connecting flanges (3.4), the tail end of the sectional cylinder (3.1) at the lowest part is provided with an end connecting flange (3.6), and the end connecting flange (3.6) is connected with the diversion cone (3.2) through a connecting rod (3.3); the guide cone (3.2) is a conical top, the cone angle is 120-160 degrees, and a hole with the diameter more than or equal to 40mm is formed in the conical surface of the guide cone (3.2).

3. The vertical sand silo for concentrating and dewatering tailings as claimed in claim 2, wherein: the rows of the flocculant spraying pipes (1.3) arranged on each flocculant feeding branch pipe (1.2) are 2-6, and the flocculant spraying pipes (1.3) are arranged at equal intervals and are mutually vertical to the flocculant feeding branch pipes (1.2); holes with the diameter of 3-10 mm are horizontally or vertically downwards opened on the flocculant spraying pipe (1.3) every 50-200 mm, and the ends of the flocculant feeding branch pipe (1.2) and the flocculant spraying pipe (1.3) are closed.

4. The vertical sand silo suitable for concentrating and dewatering tailings as claimed in claim 3, wherein: the conical surface of the diversion cone (3.2) is provided with a hole with the diameter more than or equal to 40 mm.

5. The vertical sand silo for concentrating and dewatering tailings as claimed in claim 1, 2, 3 or 4, wherein: the height of the overflow cofferdam (2.8) is 50-200 mm; the height of each sectional cylinder (3.1) is 500-2000 mm.

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