Anti-overflow middling box

Abstract

The utility model discloses an anti-overflow middling box which is arranged between a first flotation tank and a second flotation tank, and the first flotation tank, the middling box and the second flotation tank are connected in series through a pipeline, so that ore pulp at the bottom of the first flotation tank can enter the second flotation tank through the middling box; and an overflow pipe communicated with the second flotation tank is arranged at the top of the middling box and is used for discharging foam overflowing from the middling box to the second flotation tank, so that the foam is prevented from overflowing from the box body of the middling box, and the phenomenon that the middling box is full of the tank is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mineral flotation, and particularly relates to an anti-overflow middlings box. Background Art

[0002] The pulp at the bottom of the flotation machine will enter the middlings box, and then the middlings box will convey the pulp to the next-stage flotation machine for the next flotation process to improve the recovery rate of minerals and the overall separation efficiency.

[0003] The pulp entering the middlings box will form foam on the surface of the pulp. As the pulp continuously enters, the foam in the middlings box will continuously increase, there is a risk that the foam will overflow from the middlings box, and at the same time, it will also cause the phenomenon of the middlings box being full of slurry, affecting the stable operation of the next flotation process. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an anti-overflow middlings box. By setting an overflow pipe, the overflowing foam in the middlings box can enter the flotation box of the next-stage flotation machine to solve the technical problems existing in the prior art.

[0005] To solve the above technical problems, the utility model specifically provides the following technical solutions: An anti-overflow middlings box, the middlings box is arranged between the first flotation cell and the second flotation cell, and the first flotation cell, the middlings box and the second flotation cell are connected in series through pipelines, so that the pulp at the bottom of the first flotation cell can enter the second flotation cell through the middlings box; an overflow pipe communicating with the second flotation cell is arranged at the top of the middlings box for discharging the overflowing foam of the middlings box to the second flotation cell.

[0006] Further, the overflow pipe is a straight pipe to reduce the resistance caused by the overflow pipe to the foam flowing through the overflow pipe.

[0007] Further, a plurality of first nozzles are arranged at the top of the middlings box, the air outlet of the first nozzle is located inside the middlings box, and the first nozzle is connected to an external air jet device through a pipeline; the gas ejected by the first nozzle can puncture the foam existing inside the middlings box.

[0008] Further, a plurality of downwardly inclined air outlet pipes are arranged on the side wall of the first nozzle.

[0009] Further, the feed inlet of the middlings box is higher than the discharge outlet of the middlings box, and the gravity of the pulp entering from the feed inlet is used to push the pulp inside the middlings box towards the discharge outlet.

[0010] Further, the discharge port of the middlings box is arranged on the side wall of the middlings box, higher than the bottom of the middlings box, so that the pulp can stay at the bottom of the middlings box to increase the reaction time between the pulp and the chemical agent added in the middlings box.

[0011] Further, a plurality of second nozzles are provided at the bottom of the middlings box. The air outlet of the second nozzle is located inside the middlings box, and the second nozzle is connected to an external air jet device through a pipeline; the gas ejected from the second nozzle can drive the pulp around the gas to move upward to increase the fluidity of the pulp, so that the pulp can be in full contact with the chemical agent.

[0012] The utility model has the following beneficial effects compared with the prior art:

[0013] In the overflow-preventing middlings box provided by the utility model, an overflow pipe communicated with the second flotation cell is arranged at the top of the middlings box, so that the foam overflowing from the middlings box enters the second flotation cell, avoiding the foam from overflowing from the box body of the middlings box and also avoiding the phenomenon of the middlings box being full of slurry.

[0014] Further, a first nozzle is provided at the top of the middlings box, and the gas ejected from the first nozzle can pierce the foam existing inside the middlings box to slow down the rising speed of the foam.

[0015] Further, a second nozzle is provided at the bottom of the middlings box to increase the fluidity of the pulp, so that the pulp can fully react with the chemical agent, promoting the dissociation of minerals and making the mineral particles easier to be separated in the flotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extension based on the provided drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of the overflow-preventing middlings box of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the first embodiment of the overflow-preventing middlings box of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the second embodiment of the overflow-preventing middlings box of the present utility model;

[0020] Figure 4 It is a schematic diagram of the flow direction of the foam and the pulp inside the middlings box adopting the structure of the second embodiment.

[0021] The reference numerals in the figure respectively represent as follows:

[0022] 1 - intermediate ore box, 2 - first flotation cell, 3 - second flotation cell, 4 - overflow pipe, 5 - first nozzle, 6 - air jet device, 7 - air outlet pipe, 8 - feed inlet, 9 - discharge outlet, 10 - second nozzle, 11 - reagent addition port 11, 12 - reagent addition pipe. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0024] As Figure 1 shown, the present invention provides a specific embodiment of an anti - overflow intermediate ore box. The intermediate ore box 1 is arranged between the first flotation cell 2 and the second flotation cell 3, and the first flotation cell 2, the intermediate ore box 1 and the second flotation cell 3 are connected in series through pipelines, so that the pulp at the bottom of the first flotation cell 2 can enter the second flotation cell 3 through the intermediate ore box 1; an overflow pipe 4 communicating with the second flotation cell 3 is arranged at the top of the intermediate ore box 1, so that the foam overflowing from the intermediate ore box 1 can enter the second flotation cell 3, avoiding the foam directly overflowing from the box body of the intermediate ore box 1 and also avoiding the phenomenon of the intermediate ore box 1 being full of pulp.

[0025] Because the foam overflowing from the intermediate ore box 1 has a large viscosity and the flow rate will slow down. If the overflow pipe 4 is a bent pipe, the overflowing foam is likely to accumulate at the elbow of the overflow pipe 4, affecting the flow rate of the foam overflowing from the intermediate ore box 1 entering the second flotation cell 3, and there will still be a phenomenon that the foam directly overflows from the box body of the intermediate ore box 1 and the intermediate ore box 1 is full of pulp.

[0026] Therefore, in this embodiment, the overflow pipe 4 is preferably a chute structure, which can not only reduce the resistance caused by the overflow pipe 4 to the foam flowing through the overflow pipe 4, but also the slope of the chute can accelerate the flow rate of the foam, so that the foam overflowing from the intermediate ore box 1 can relatively quickly enter the second flotation cell 3 through the overflow pipe 4.

[0027] Furthermore, in this embodiment, a first embodiment of the intermediate ore box is provided, as Figure 2 shown:

[0028] A plurality of first nozzles 5 are provided at the top of the middlings box 1. The air outlet of the first nozzle 5 is located inside the middlings box 1, and the first nozzle 5 is connected to an external air jet device 6 through a pipeline; the gas ejected from the first nozzle 5 can pierce the foam existing inside the middlings box 1 to slow down the rising speed of the foam.

[0029] In order to improve the effect of the gas piercing the foam, a plurality of downwardly inclined air outlet pipes 7 are provided on the side wall of each first nozzle 5, which expands the coverage range of the gas to reduce the amount of foam generated inside the middlings box 1, thereby avoiding the occurrence of foam overflow phenomenon.

[0030] Furthermore, in this embodiment, the first nozzle 5 can be replaced with a spray head, and the foam can be promoted to break by spraying water onto the foam layer.

[0031] The middlings box 1 is mainly used to realize the circulation of the pulp to improve the flotation efficiency. In this case, in this embodiment, a reagent addition port 11 is provided at the top of the middlings box 1. By adding chemical reagents into the middlings box 1, the dissociation of minerals can be promoted, making the mineral particles more easily separated in the next flotation process.

[0032] Inside the middlings box 1, a reagent addition pipe 12 extends inward at the reagent addition port 11, so that the end of the reagent addition pipe 12 is located above the pulp liquid level to prevent the end of the reagent addition pipe 12 from being blocked by the pulp.

[0033] Therefore, the pulp needs to stay in the middlings box 1 for a certain period of time to ensure that the minerals in the pulp can fully react with the chemical reagents to improve the efficiency of the subsequent flotation process.

[0034] In order to improve the diffusion rate of the chemical reagent, a plurality of reagent addition ports 11 and reagent addition pipes 12 can be provided. In the figure, a set of reagent addition ports 11 and reagent addition pipes 12 are provided at the middle position of the middlings box 1 for illustration.

[0035] In this embodiment, the pulp in the middlings box 1 does not flow into the second flotation cell 3 through a pump body to avoid too fast a flow rate. Instead, the feed port 8 of the middlings box 1 is set higher than the discharge port 9 of the middlings box 1, and the gravity of the pulp entering from the feed port 8 is used to push the pulp inside the middlings box 1 towards the discharge port 9; at the same time, when the pulp flows from a higher point to a lower point, a pressure difference will be generated due to the height difference, and this pressure difference can also push the pulp to flow.

[0036] Furthermore, the discharge port 9 of the middlings box 1 is provided on the side wall of the middlings box 1 and is higher than the bottom of the middlings box 1, so that the pulp can stay at the bottom of the middlings box 1 to increase the reaction time between the minerals in the pulp and the chemical reagents.

[0037] Due to the relatively high viscosity of the pulp, the diffusion of chemical agents in the pulp is from top to bottom. In order to enable the minerals in the pulp at the bottom of the middlings box to come into full contact with the chemical agents, in this embodiment, on the basis of the first embodiment, a second embodiment of the middlings box is further provided, as Figure 3 shown:

[0038] A plurality of second nozzles 10 are provided at the bottom of the middlings box 1. The air outlet of the second nozzle 10 is located inside the middlings box 1, and the second nozzle 10 is connected to an external air jet device 6 through a pipeline.

[0039] The gas ejected from the second nozzle 10 causes the pulp at the bottom of the middlings box to flow upward, so as to shorten the contact time with the chemical agent; at the same time, the air flow has a stirring effect inside the pulp, accelerating the downward diffusion speed of the chemical agent; so as to increase the coverage range of the chemical agent, enabling the minerals in the pulp to react fully with the chemical agent.

[0040] Since the pulp will stay at the bottom of the middlings box 1, and the pulp at the bottom has poor fluidity, it will cause the solid particles in the pulp to settle, resulting in a rising liquid level, which will in turn accelerate the rate of the foam overflowing from the middlings box 1.

[0041] The gas ejected from the second nozzle 10 will generate an upward buoyancy force inside the pulp, driving the pulp around the gas to move upward; thus preventing the solid particles in the pulp from settling and accumulating at the bottom of the middlings box 1.

[0042] Further, as Figure 4 shown, adjust the spraying angle of the second nozzle 10 so that the spraying angle of the second nozzle 10 faces the discharge port 9 of the middlings box 1, and the pulp at the bottom has a tendency to flow obliquely upward towards the discharge port 9, so that the pulp entering from the feed port 8 has a tendency to settle downward, so as to increase the residence time of the pulp inside the middlings box, enabling the pulp to react fully with the chemical agent and promoting the dissociation of minerals.

[0043] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. An anti-overflow ore box, characterized in that: The intermediate ore box (1) is arranged between the first flotation cell (2) and the second flotation cell (3), and the first flotation cell (2), the intermediate ore box (1) and the second flotation cell (3) are connected in series through a pipeline, so that the ore pulp at the bottom of the first flotation cell (2) can enter the second flotation cell (3) through the intermediate ore box (1); An overflow pipe (4) connected to the second flotation tank (3) is provided on the top of the intermediate ore box (1) for discharging the foam overflowing from the intermediate ore box (1) to the second flotation tank (3).

2. The anti-overflow ore box according to claim 1, characterized in that: The overflow pipe (4) is a chute structure, so as to reduce the resistance caused by the overflow pipe (4) to the foam flowing through the overflow pipe (4).

3. The anti-overflow ore box according to claim 1, characterized in that: A plurality of first nozzles (5) are provided on the top of the intermediate ore box (1), the gas outlets of the first nozzles (5) are located inside the intermediate ore box (1), and the first nozzles (5) are connected to an external gas injection device (6) through a pipeline; The gas sprayed by the first nozzle (5) can puncture the foam inside the intermediate ore box (1).

4. The anti-overflow ore box according to claim 3, characterized in that: The side wall of the first nozzle (5) is provided with a plurality of air outlet pipes (7) arranged to be inclined downward.

5. The anti-overflow ore box according to claim 1, characterized in that: The feed port (8) of the intermediate ore box (1) (1) is higher than the discharge port (9) of the intermediate ore box (1), and the gravity of the ore slurry entering from the feed port (8) is used to push the ore slurry inside the intermediate ore box (1) to flow toward the discharge port (9).

6. The anti-overflow ore box according to claim 1 or 5, characterized in that: The top of the intermediate ore box (1) is provided with a reagent adding port (11) for adding chemical reagents into the intermediate ore box (1) to promote the dissociation of minerals in the ore pulp; A reagent adding pipe (12) is provided inwardly extending from the reagent adding port (11) inside the intermediate ore box (1), and the end of the reagent adding pipe (12) is located in the upper middle part of the intermediate ore box (1).

7. The anti-overflow ore box according to claim 6, characterized in that: The discharge port (9) of the intermediate ore box (1) is arranged on the side wall of the intermediate ore box (1) and is higher than the bottom of the intermediate ore box (1), so that the slurry can stay at the bottom of the intermediate ore box (1) to increase the reaction time between the slurry and the chemical agent added in the intermediate ore box (1).

8. The anti-overflow ore box according to claim 7, characterized in that: A plurality of second nozzles (10) are provided at the bottom of the intermediate ore box (1), the gas outlets of the second nozzles (10) are located inside the intermediate ore box (1), and the second nozzles (10) are connected to an external jetting device (6) via a pipeline; The gas ejected from the second nozzle (10) can drive the ore pulp around the gas to move upwards, thereby increasing the fluidity of the ore pulp and enabling the ore pulp to fully contact with the chemical agent.

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