Pre-wetting dense medium cyclone device

Abstract

The pre-wetting dense medium cyclone device comprises a first-stage cyclone and a pre-wetting structure, the first-stage cyclone is provided with a feeding port, a dense medium suspension liquid inlet, a concentrate outlet and a heavy ore outlet, the pre-wetting structure comprises a wetting barrel, an opening is formed in the top of the wetting barrel, a guide plate is arranged at the opening, the guide plate is arranged in an inclined mode, and the feeding port is communicated with the wetting barrel. A wetting pipe is arranged on the side wall of the wetting barrel, one end of the wetting pipe extends into the wetting barrel and is arranged in the circumferential direction of the inner wall of the wetting barrel, and the other end of the wetting pipe is located outside the wetting barrel and connected with a first centrifugal pump; the first centrifugal pump pumps dense medium suspension liquid into the wetting barrel to pre-wet raw ore, and a discharging port is formed in the bottom of the wetting barrel and connected with the feeding port through a pipeline. Raw ore is pre-wetted in advance and then enters the first-stage cyclone and the second-stage cyclone to be separated, so that the separation effect and the separation precision are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coal preparation technology field, specifically, relates to a pre-wetting heavy medium cyclone device. BACKGROUND

[0002] Heavy medium coal preparation is a kind of separation method widely used in coal preparation industry, and its working principle is to use the suspension with certain density as medium, enters cyclone at certain tangential velocity, and generates high-speed rotating flow field in cyclone. Raw coal enters from the inlet of cyclone, under the action of suspension, due to the size difference between coarse particles and fine particles, the centrifugal force, centripetal buoyancy, fluid drag force and the like received by them are different in size, so that coarse particles are discharged through the underflow port of cyclone under the action of centrifugal force, and fine particles are discharged by overflow pipe, to achieve the purpose of separation and classification.

[0003] The suspension itself is the ore pulp with viscosity, when raw coal enters cyclone, it is first mixed with suspension fully to reduce the wetting difference of raw coal, which is beneficial to separation, but the process will occupy the separation time, resulting in low separation precision and separation efficiency. In view of this, it is necessary to improve the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a pre-wetting heavy medium cyclone device, and aims at solving one of the technical problems of the prior art, and adopts the technical solution as follows to achieve the above purpose:

[0005] A pre-wetting heavy medium cyclone device, comprising a primary cyclone and a pre-wetting structure, the primary cyclone is provided with a feed inlet, a heavy medium suspension inlet, a concentrate outlet and a heavy mineral outlet, the pre-wetting structure comprises a wetting barrel, the top of the wetting barrel is open, a guide plate is arranged at the opening, the guide plate is arranged obliquely to ensure that the to-be-selected raw ore falls along the inner wall of the wetting barrel under the guidance of the guide plate, a wetting pipe is arranged on the side wall of the wetting barrel, one end of the wetting pipe extends into the wetting barrel and is arranged circumferentially along the inner wall of the wetting barrel, and the other end of the wetting pipe is located outside the wetting barrel and connected with a first centrifugal pump, the first centrifugal pump pumps heavy medium suspension into the wetting barrel to pre-wet the raw ore, a discharge port is arranged at the bottom of the wetting barrel, the discharge port is connected with the feed inlet through a pipeline, the heavy medium suspension inlet is connected with a second centrifugal pump, and the second centrifugal pump pumps heavy medium suspension into the primary cyclone to separate the wetted raw ore.

[0006] Preferably, the primary cyclone is cylindrical, and the primary cyclone is arranged obliquely.

[0007] Preferably, the device further comprises a secondary cyclone, the secondary cyclone is provided with a feed inlet, a tailing outlet and a middling outlet, and the heavy mineral outlet is connected with the feed inlet through a pipeline.

[0008] Preferably, the secondary cyclone is conical and arranged at an angle.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] This invention relates to a pre-wetting heavy medium hydrocyclone device, which pre-wets the raw ore before it enters the primary and secondary hydrocyclones for separation, thereby improving the separation effect and accuracy. Furthermore, the device has a simple structure, is easy to manufacture, performs well, and is highly practical. Attached Figure Description

[0011] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model.

[0013] In the diagram: 1. Primary hydrocyclone; 2. Secondary hydrocyclone; 3. First centrifugal pump; 4. Second centrifugal pump; 5. Feed inlet; 6. Concentrate outlet; 7. Heavy ore outlet; 8. Heavy medium suspension inlet; 9. Mid-minerals outlet; 10. Tailings outlet; 11. Feed inlet; 12. Wetting tank; 13. Baffle plate; 14. Wetting pipe; 15. Discharge outlet. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] like Figure 1 As shown, a preferred embodiment of the present invention provides a pre-wetting heavy medium cyclone device, which includes a primary cyclone 1, a secondary cyclone 2, a pre-wetting structure, a first centrifugal pump 3, and a second centrifugal pump 4.

[0017] The first-stage hydrocyclone 1 is cylindrical and arranged at an angle. It has a feed inlet 5 at the top, a concentrate outlet 6 at the bottom, a heavy ore outlet 7 on the side wall near the top, and a heavy medium suspension inlet 8 on the side wall near the bottom.

[0018] The secondary hydrocyclone 2 is conical and similarly arranged at an angle. The wider top end has a middlings outlet 9, and the narrower bottom end has a tailings outlet 10. The side wall near the top end has a feed inlet 11. The heavy ore outlet 7 of the primary hydrocyclone 1 is connected to the feed inlet 11 of the secondary hydrocyclone 2 via a pipeline.

[0019] The pre-wetting structure includes a wetting tank 12, located above the primary hydrocyclone 1. The top of the wetting tank 12 is open, and a guide plate 13 is installed at the opening. The guide plate 13 is inclined and can be fixedly connected to the wall of the wetting tank 12 via a connecting rod. The purpose of the guide plate 13 is to ensure that the raw ore to be processed flows down along the inner wall of the wetting tank 12 after being guided by the guide plate 13. A wetting pipe 14 is installed on the side wall of the wetting tank 12. One end of the wetting pipe 14 extends into the wetting tank 12 and is arranged circumferentially along the inner wall of the wetting tank 12, while the other end is located outside the wetting tank 12 and connected to a first centrifugal pump 3. The first centrifugal pump 3 pumps a heavy medium suspension into the wetting tank 12 to pre-wet the raw ore. This arrangement ensures that the heavy medium suspension and the raw ore to be processed are thoroughly mixed, thereby improving the effect of the next separation step.

[0020] The bottom of the wetting tank 12 is provided with a discharge port 15, which is connected to the feed port 5 through a pipeline, so that the wetted raw ore can smoothly enter the first-stage hydrocyclone 1.

[0021] The heavy medium suspension inlet 8 is connected to the second centrifugal pump 4, which pumps the heavy medium suspension into the first-stage hydrocyclone 1 to separate the wetted raw ore. After separation by the first-stage hydrocyclone 1, the selected concentrate is discharged from the concentrate outlet 6, the heavy ore enters the second-stage hydrocyclone 2 for further separation, the selected middlings are discharged from the middlings outlet 9, and the remaining tailings are discharged from the tailings outlet 10.

[0022] In summary, the pre-wetting heavy medium hydrocyclone device described in this embodiment of the invention pre-wets the raw ore before it enters the primary and secondary hydrocyclones for separation, thereby improving the separation effect and accuracy. Furthermore, this device has a simple structure, is easy to manufacture, performs well, and is highly practical.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pre-wetting heavy medium cyclone device, characterized in that, The system includes a primary hydrocyclone and a pre-wetting structure. The primary hydrocyclone has a feed inlet, a heavy medium suspension inlet, a concentrate outlet, and a heavy ore outlet. The pre-wetting structure includes a wetting tank with an opening at the top. A guide plate is installed at the opening, and the guide plate is inclined to ensure that the raw ore to be processed falls along the inner wall of the wetting tank after being guided by the guide plate. A wetting pipe is installed on the side wall of the wetting tank. One end of the wetting pipe extends into the wetting tank and is arranged circumferentially along the inner wall of the wetting tank. The other end is located outside the wetting tank and is connected to a first centrifugal pump. The first centrifugal pump pumps heavy medium suspension into the wetting tank to pre-wet the raw ore. A discharge port is provided at the bottom of the wetting tank and is connected to the feed inlet through a pipeline. The heavy medium suspension inlet is connected to a second centrifugal pump, which pumps heavy medium suspension into the primary hydrocyclone to separate the wetted raw ore.

2. The pre-wetting heavy medium cyclone apparatus according to claim 1, characterized in that, The first-stage hydrocyclone is cylindrical and arranged at an angle.

3. The pre-wetting heavy medium cyclone apparatus according to claim 1, characterized in that, The device also includes a secondary hydrocyclone, which has a feed inlet, a tailings outlet and a middlings outlet. The heavy ore outlet is connected to the feed inlet via a pipeline.

4. The pre-wetting heavy medium cyclone apparatus according to claim 3, characterized in that, The secondary cyclone is conical and arranged at an angle.

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