Foam gathering device for ferrous metal reverse flotation process tailing conveying trough

Abstract

The foam gathering device comprises a water storage tank, the top of the water storage tank is provided with a water supply pipeline communicated with the water storage tank, and the bottom of the water storage tank is provided with a water outlet plate; the water supply pipeline is L-shaped and comprises a vertical pipe and a horizontal pipe, the end part of the vertical pipe is inserted into the water storage tank, a water flow distributor is arranged at the end part of the vertical pipe, the horizontal pipe is provided with an adjusting valve, and two sectional splitter plates which are symmetrically arranged are arranged below the water flow distributor. Foam gathering in the tailing conveying groove can be achieved, repeated foaming of the foam groove caused by pulp flowing and bubble rolling under the action of a foaming agent is avoided, the working efficiency of the flotation tailing pulp suction machine is improved, the tailing conveying capacity of a flotation machine is guaranteed, and the tailing output rate of the flotation process is increased. Therefore, flotation production indexes are guaranteed, and the method is of great significance to production of reverse flotation processes of flotation procedures of dressing plants.

Description

Technical Field

[0001] The invention belongs to the technical field of metal reverse flotation, and relates to a foam compacting device for a tailings conveying trough in a ferrous metal reverse flotation process. Background Art

[0002] The reverse flotation process of ferrous metals is generally a multi-stage flotation process. Therefore, chemical defoamers cannot be used for defoaming during the transportation of concentrates / tailings in the production process. However, the roughing, concentrating and scavenging tailings still contain some foaming agent components. In the process of conveying tailings in each stage of flotation, repeated foaming and difficulty in foam conveying occur, resulting in problems such as untimely tailings transportation, foam overflow, and failure to meet production indicators. At the same time, the amount of foam in the flotation tailings transportation process also seriously restricts the production capacity of the ferrous metal reverse flotation process. Since the foam is composed of air, water and slurry fed by a blower under the action of a foaming agent, foam aggregation treatment for the reverse flotation process can solve the above technical problems. Foam aggregation treatment refers to the discharge of gas in the foam to restore the slurry to a fluid state as much as possible.

[0003] The defects of existing defoaming technology are as follows: (1) Using a single large-aperture water column to completely penetrate the foam layer of the slurry for defoaming will impact the slurry at the bottom of the foam tank. Under the action of the frother, new bubbles will be formed again, and the bubbles will be repeatedly generated. The range of breaking the bubbles is limited; (2) Using a single small-aperture water column to impact the foam layer cannot penetrate the foam layer to break the foam. The range of breaking the bubbles is limited and the ideal defoaming effect cannot be achieved; (3) Adding inhibitors for defoaming has a great impact on the subsequent production process and production indicators of multi-stage reverse flotation; (4) Mechanical defoaming is costly, and it will affect the process continuity of multi-stage repeated flotation and has limited processing capacity. Summary of the invention

[0004] The purpose of the present invention is to provide a foam agglomeration device for a tailings conveying trough of a ferrous metal reverse flotation process in view of the problems existing in the prior art, so as to solve the problems existing in the prior ferrous metal reverse flotation process, such as repeated foaming during the conveying of tailings in each flotation section, low washing efficiency of the pulp washer and difficulty in foam conveying, which lead to untimely tailings conveying, foam accumulation, foam overflow, and failure to meet production indicators.

[0005] To this end, the present invention adopts the following technical solutions: A foam aggregation device for a tailings conveying trough in a ferrous metal reverse flotation process comprises a water storage tank, wherein a water supply pipeline connected to the water storage tank is provided on the top and a water outlet plate is provided on the bottom; the water supply pipeline is L-shaped, comprising a vertical pipe and a horizontal pipe, wherein the end of the vertical pipe is inserted into the water storage tank and a water flow distributor is provided on the end, the horizontal pipe is provided with a regulating valve, and two symmetrically arranged segmented flow distributors are provided below the water flow distributor, and the two segmented flow distributors form an inverted V shape.

[0006] The purpose of setting the regulating valve is to adjust the water flow column pressure of the water outlet plate according to the different foam layer thickness, different bubble size and different foam density in the tailings conveying trough, so as to realize the compaction of different foam layer thickness, different bubble size and different foam density in the tailings conveying trough.

[0007] Furthermore, the segmented diverter plate is arranged at an angle, and includes a first plate body, a second plate body, a third plate body and a fourth plate body, and the heights of the four plates decrease successively. The areas of the first plate body, the second plate body, the third plate body and the fourth plate body are each one-fourth of the area of ​​the segmented diverter plate. The purpose of its setting is that in the process of water flowing downward from the first plate body to the fourth plate body, each plate body can divert about 1 / 4 of the water so as to achieve a uniform diversion effect as much as possible.

[0008] The first plate body is provided with a plurality of regularly arranged first flow diversion holes, the second plate body is provided with a plurality of regularly arranged second flow diversion holes, the third plate body is provided with a plurality of regularly arranged third flow diversion holes, and the fourth plate body is provided with a plurality of regularly arranged fourth flow diversion holes.

[0009] The apertures of the first diverter hole, the second diverter hole, the third diverter hole and the fourth diverter hole increase in sequence, and the four are arranged in a staggered manner; wherein, the purpose of setting diverter holes of different apertures is to achieve the effect of uniform water pressure and water volume of each water outlet hole of the water outlet plate. According to the distance between each section of the diverter hole and the water flow distributor, the segmented diverter plate adopts the method of increasing the aperture of each section in sequence. First, the segmented diverter plate can buffer the water pressure of the water outlet plate, and second, the water volume can be evenly distributed in the water tank through each section of the diverter hole, so that the water volume and water pressure of the water outlet plate are relatively uniform, and the phenomenon of repeated bubbling of the foam tank caused by excessive pressure of the water outlet hole near the water flow distributor is eliminated; in addition, the first diverter hole, the second diverter hole, the third diverter hole and the fourth diverter hole are arranged in a staggered manner respectively, so that each section of the diverter hole can be passed by water, thereby achieving a reasonable and uniform diversion effect.

[0010] Furthermore, the aperture of the first diversion hole is 8-11 mm, the aperture of the second diversion hole is 12-14 mm, the aperture of the third diversion hole is 15-16 mm, and the aperture of the fourth diversion hole is 18-20 mm.

[0011] Furthermore, the distance between the water flow distributor and the segmented flow divider is 10-30 mm; wherein the water flow distributor is used to limit the water supply point of the segmented flow divider so that the water flow must pass through the top of the segmented flow divider to flow downward; Furthermore, the length of the water flow distributor is the same as the width of the water tank. It is located at the center of the water tank, and both ends of the water flow distributor are in vertical contact with the inner wall of the water tank to achieve uniform longitudinal water supply to the segmented diverter plate and uniform water diversion on the surface of the segmented diverter plate.

[0012] Furthermore, the water flow distributor is arranged horizontally and is vertically connected to the water supply pipeline. A strip opening is provided at the bottom of the water flow distributor, and the top is connected to the water supply pipeline.

[0013] Furthermore, the strip-shaped opening is located above the connection between the two segmented diverter plates, and the two are arranged opposite to each other.

[0014] Furthermore, the water outlet plate is provided with a plurality of regularly arranged water outlet holes, the hole diameter of which is 3-6 mm, and water outlet holes of different hole diameters and arrangement densities are selected according to the foam density in the multi-stage reverse flotation process; Specifically, if the foam density is high, the bubble viscosity is large, the toughness is strong, the foam fluidity is low and it is not easy to break, then a relatively high-pressure water column is required to penetrate part of the foam layer to break the bubbles and achieve the effect of foam compaction, so it is appropriate to choose a water outlet plate with a small pore size and dense arrangement; if the foam density is low, the bubbles are relatively loose, the bubble viscosity is low, the brittleness is strong and it is easy to break, then a relatively low-pressure water column is required to penetrate part of the foam layer to break the bubbles and achieve the effect of foam compaction, so it is appropriate to choose a water outlet plate with a large pore size and dispersed arrangement.

[0015] Furthermore, the segmented diverter plate is as wide as the water tank, and its bottom edge is in complete contact with the bottom edge inside the water tank.

[0016] Furthermore, the length of the two segmented diverter plates after being assembled is exactly equal to the inner length of the water tank.

[0017] The beneficial effects of the present invention are: 1. The present invention can control the water pressure of the water supply pipeline by adjusting the valve according to the size and density of the bubbles in the tailings conveying trough, so that the dense water column on the water outlet plate can penetrate the foam layer of 1 / 2-2 / 3 depth in the tailings conveying trough under a certain pressure to break the bubbles in the tailings conveying trough, so that the air can be discharged without impacting the slurry at the bottom of the foam trough, thus preventing repeated foaming and effectively realizing foam aggregation; 2. The present invention realizes multi-stage diversion by setting a segmented diverter plate to achieve uniform distribution of water volume and water pressure in the water storage tank, making the water outlet pressure uniform, and avoiding the problem of repeated foaming under the action of the foaming agent due to uneven pressure in each water outlet hole; 3. The present invention can control the amount of water output by adjusting the valve according to the amount of tailings thrown out by the flotation machine, and its use does not affect the subsequent process operation and production indicators; 4. The present invention can not only realize the foam compaction of the tailings conveying trough in the ferrous metal reverse flotation process, but also can adjust the tailings conveying concentration in the tailings conveying trough by adjusting the valve to control the water output, thereby effectively enhancing the working efficiency of the pulp washer and improving the conveying rate of the tailings in the flotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the main structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the water flow distributor in the present invention; Figure 4 It is a schematic diagram of the top view of the structure of the middle section type diverter plate of the present invention.

[0019] In the figure, 1-regulating valve, 2-water supply pipeline, 3-water flow distributor, 3a-strip opening, 4-segmented diverter plate, 4a-first plate body, 4a1-first diverter hole, 4b-second plate body, 4b1-second diverter hole, 4c-third plate body, 4c1-third diverter hole, 4d-fourth plate body, 4d1-fourth diverter hole, 5-water storage tank, 6-water outlet plate. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described below in conjunction with the accompanying drawings and implementation methods.

[0021] like Figure 1 and 2 As shown, a foam aggregation device for a tailings conveying trough in a ferrous metal reverse flotation process includes a water storage tank 5 having a size of 1500mm*300mm*250mm; the bottom of the water storage tank 5 is open, and a water supply pipeline 2 connected to the water storage tank is provided on the top, and a water outlet plate 6 is provided on the bottom.

[0022] The water supply pipeline 2 is L-shaped, including a vertical pipe and a horizontal pipe; wherein the end of the vertical pipe is inserted into the water storage tank 5 and a water flow distributor 3 is provided at the end, and the horizontal pipe is provided with a regulating valve 1.

[0023] The length of the water flow distributor 3 is the same as the width of the water tank 5. It is located at the center of the water tank 5, and both ends of the water flow distributor 3 are in vertical contact with the inner wall of the water tank 5. The water flow distributor 3 is horizontally arranged and vertically connected to the water supply pipeline 2.

[0024] like Figure 3 As shown, the water flow distributor 3 has a strip opening 3a at the bottom and is connected to the water supply pipeline 2 at the top; the strip opening 3a is located above the connection of the two segmented flow dividers 4, and the two are arranged opposite to each other.

[0025] Two symmetrically arranged segmented flow dividers 4 are provided below the water flow distributor 3 , and the distance between the water flow distributor 3 and the segmented flow dividers 4 is 10 mm.

[0026] The two segmented diverter plates 4 form an inverted V shape. The length of the two segmented diverter plates 4 after being assembled is exactly equal to the inner length of the water tank 5. At the same time, the segmented diverter plate 4 is the same width as the water tank 5, and its bottom edge is completely in contact with the inner bottom edge of the water tank 5.

[0027] like Figure 4 As shown, the segmented diverter plate 4 is inclined, and includes a first plate body 4a, a second plate body 4b, a third plate body 4c and a fourth plate body 4d, and the heights of the four decrease successively; the first plate body 4a is provided with a plurality of regularly arranged first diverter holes 4a1, the second plate body 4b is provided with a plurality of regularly arranged second diverter holes 4b1, the third plate body 4c is provided with a plurality of regularly arranged third diverter holes 4c1, and the fourth plate body 4d is provided with a plurality of regularly arranged fourth diverter holes 4d1; the apertures of the first diverter hole 4a1, the second diverter hole 4b1, the third diverter hole 4c1 and the fourth diverter hole 4d1 increase successively, and the four are staggered.

[0028] Specifically, the aperture of the first diverter hole 4a1 is 8 mm, the aperture of the second diverter hole 4b1 is 12 mm, the aperture of the third diverter hole 4c1 is 15 mm, and the aperture of the fourth diverter hole 4d1 is 18 mm.

[0029] In addition, the water outlet plate 6 is provided with a plurality of regularly arranged water outlet holes, the hole diameter of which is 3 mm; according to different properties of the foam, the hole diameter and arrangement distance of the water outlet holes on the water outlet plate 6 can be adjusted.

[0030] When the amount of foaming agent added is large and the concentration of the agent is high, the foam is relatively dense, the bubble viscosity is relatively large, the toughness is relatively strong, the foam fluidity is low, and it is not easy to break. At this time, the water pressure of the water supply pipe 2 is increased by adjusting valve 1, so that the relatively high-pressure water column penetrates the foam layer and breaks the bubbles; when the amount of foaming agent added is small and the concentration of the agent is low, the foam is relatively dispersed, the bubble viscosity is low, the brittleness is strong, and it is easy to break. At this time, the water pressure of the water supply pipe 2 is reduced by adjusting valve 1, so that the relatively low-pressure water column penetrates the foam layer and breaks the bubbles.

[0031] The working principle of the present invention is as follows: First, the device is installed as a whole at a position 500-550mm above the foam tank at the tail end of the flotation tailings conveying, with the water outlet plate 6 facing downward, and the whole device is placed horizontally with the foam tank; secondly, the water flows through the water supply pipeline 2 and the water flow distributor 3 to evenly distribute the water to the segmented diverter plates 4 on both sides, and then diverts through the different aperture diverter holes on the first plate body 4a, the second plate body 4b, the third plate body 4c and the fourth plate body 4d, so that the water supply of the slurry water flow in the water storage tank 5 in each diverter hole is relatively balanced and the water supply pressure is relatively stable. At the same time, according to the different properties of the foam, the water outlet plate 6 with a suitable aperture and arrangement distance is selected; finally, by controlling the regulating valve 1, the water column at the water outlet plate reaches a pressure that can penetrate 1 / 2-2 / 3 of the foam layer, and does not impact the slurry at the bottom of the foam tank, and uses a dense water column to break the foam on the upper layer of the foam tank, so that the air in the bubbles is discharged, and the slurry is restored to a fluid state, thereby achieving a foam aggregation effect.

Claims

1. A foam compaction device for tailings conveying trough in ferrous metal reverse flotation process, characterized in that: The invention comprises a water storage tank (5), wherein a water supply pipeline (2) is provided on the top of the water storage tank (5) and is connected thereto, and a water outlet plate (6) is provided on the bottom; the water supply pipeline (2) is L-shaped and comprises a vertical pipe and a horizontal pipe, wherein the end of the vertical pipe is inserted into the water storage tank (5) and is provided with a water flow distributor (3), the horizontal pipe is provided with a regulating valve (1), and two segmented flow distributors (4) are symmetrically provided below the water flow distributor (3), and the two segmented flow distributors (4) are formed in an inverted V shape.

2. The foam compaction device for tailings conveying trough of ferrous metal reverse flotation process according to claim 1 is characterized in that: The segmented flow divider plate (4) is arranged in an inclined manner, and comprises a first plate body (4a), a second plate body (4b), a third plate body (4c) and a fourth plate body (4d), and the heights of the four plates decrease in sequence; The first plate body (4a) is provided with a plurality of regularly arranged first flow diversion holes (4a1), the second plate body (4b) is provided with a plurality of regularly arranged second flow diversion holes (4b1), the third plate body (4c) is provided with a plurality of regularly arranged third flow diversion holes (4c1), and the fourth plate body (4d) is provided with a plurality of regularly arranged fourth flow diversion holes (4d1); The apertures of the first diversion hole (4a1), the second diversion hole (4b1), the third diversion hole (4c1) and the fourth diversion hole (4d1) increase in sequence, and the four are arranged in a staggered manner.

3. The foam compaction device for tailings conveying trough of ferrous metal reverse flotation process according to claim 2 is characterized in that: The aperture of the first diversion hole (4a1) is 8-11 mm, the aperture of the second diversion hole (4b1) is 12-14 mm, the aperture of the third diversion hole (4c1) is 15-16 mm, and the aperture of the fourth diversion hole (4d1) is 18-20 mm.

4. The foam consolidation device for tailings conveying trough in ferrous metal reverse flotation process according to claim 1, characterized in that: The distance between the water flow distributor (3) and the segmented flow divider plate (4) is 10 to 30 mm.

5. The foam consolidation device for tailings conveying trough in ferrous metal reverse flotation process according to claim 1, characterized in that: The length of the water flow distributor (3) is the same as the width of the water tank (5), and it is located at the center of the water tank (5), and both ends of the water flow distributor (3) are in vertical contact with the inner wall of the water tank (5).

6. The foam compaction device for tailings conveying trough in ferrous metal reverse flotation process according to claim 1, characterized in that: The water flow distributor (3) is arranged horizontally and is vertically connected to the water supply pipeline (2); a strip opening is provided at the bottom of the water flow distributor (3), and the top of the water flow distributor (3) is in communication with the water supply pipeline (2).

7. The foam compaction device for tailings conveying trough in ferrous metal reverse flotation process according to claim 6, characterized in that: The strip-shaped opening is located above the connection between the two segmented flow divider plates (4), and the two are arranged opposite to each other.

8. The foam compaction device for tailings conveying trough in ferrous metal reverse flotation process according to claim 1, characterized in that: The water outlet plate (6) is provided with a plurality of regularly arranged water outlet holes, the hole diameter of which is 3 to 6 mm.

9. The foam compaction device for tailings conveying trough in ferrous metal reverse flotation process according to claim 1, characterized in that: The segmented flow divider plate (4) is the same width as the water storage tank (5), and its bottom edge is in complete contact with the inner bottom edge of the water storage tank (5).

10. The foam compaction device for tailings conveying trough in ferrous metal reverse flotation process according to claim 1, characterized in that: The length of the two segmented flow dividers (4) after being assembled is exactly equal to the inner length of the water storage tank (5).

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