Steady-state rectification coarse slime separation device

Abstract

The utility model discloses a steady-state rectification coarse slime separation device which comprises a product separation and collection area. The product sorting and collecting area is divided into a gangue collecting tank, a clean coal collecting tank and a fine coal slime collecting tank by a first partition plate and a second partition plate; discharge holes are formed in the bottoms of the gangue collecting tank, the clean coal collecting tank and the fine coal slime collecting tank; and a control valve is mounted on each discharge hole. The method has the advantages that under the action of laminar steady-state water flow, gangue particles are high in settling speed and first settle to the gangue collecting tank; coarse coal slime particles settle slowly and sink gradually in a layered mode after gangue particles settle and are separated, coarse coal slime particles overflow from the first partition plate to the clean coal collecting tank to be settled and collected, fine coal slime settle at the relatively slowest speed and overflow to the fine coal slime collecting tank through the second partition plate, and therefore the stable state that materials with specific particle sizes are separated according to density is formed. Therefore, gangue particles, coarse coal slime and fine coal slime are separated and collected in different areas, and the separation process is completed.

Description

Technical Field

[0001] This utility model relates to the field of mineral sorting technology, and in particular to a steady-state rectified coarse coal slime sorting device. Background Technology

[0002] The efficient utilization of coal resources is of great significance to achieving the "dual carbon" goal. Coal washing and processing is a prerequisite for the efficient utilization of coal resources. With the promotion and application of fully mechanized automated and intelligent mining technologies, the content of fine particles (<3mm) in the raw coal fed into coal preparation plants is increasing day by day. The recycling of coarse coal slime has received special attention. The main coarse coal slime separation equipment in my country includes spiral classifiers, water-medium hydrocyclones, coal slime heavy medium hydrocyclones, and liquid-solid fluidized bed separators.

[0003] Spiral classifiers exhibit poor separation performance at low particle sizes; while water-medium hydrocyclones are simple in structure, their separation efficiency is low; coal slime heavy medium hydrocyclones are complex systems, difficult to operate, and costly. Liquid-solid fluidized bed separators offer low and adjustable separation densities and high efficiency when the particle size range is narrow. However, in practical applications, they are easily affected by unstable upflow and feed rate, hindering the formation of a stable fluidized bed environment and thus interfering with separation, resulting in low separation accuracy and poor separation performance. Utility Model Content

[0004] The purpose of this invention is to provide a steady-state rectifier coarse coal slime separation device with a simple structure and reliable separation effect, in order to solve the problems of low recovery rate and poor separation accuracy of existing coarse coal slime.

[0005] This utility model is implemented by the following technical solution: a steady-state rectifying coarse coal slime separation device, which includes a feed pipe, a buffer box, a distribution plate, a guide trough, and a product separation and collection area; the distribution plate is vertically fixed at the bottom of the buffer box, and the two sides of the distribution plate are sealed to the inner walls of the two sides of the buffer box; the distribution plate has several through holes; the feed pipe is fixed through the top of the buffer box on one side of the distribution plate, and the side wall of the buffer box on the other side of the distribution plate is connected to the product through a flow port. The sorting and collection areas are connected, and the flow outlet is provided with a guide channel extending to the product sorting and collection area; the product sorting and collection area is divided into a gangue collection tank, a clean coal collection tank, and a fine coal slime collection tank by a first partition and a second partition. The first partition and the second partition are arranged in order from near to far relative to the guide channel, and the height of the second partition is higher than that of the first partition; the bottom of the gangue collection tank, the clean coal collection tank, and the fine coal slime collection tank are all provided with a discharge port, and a control valve is installed on each discharge port.

[0006] Furthermore, the bottom of the feed pipe inside the buffer box has an outward-flaring flared structure.

[0007] Furthermore, the guide channel is a guide area formed by multiple parallel arranged strip steel plates, with a spacing of 50mm between each pair of adjacent strip steel plates.

[0008] Advantages of this invention: Coarse coal slime material is fed in through the feed pipe, and the flow rate of the material is reduced by the flared opening at the bottom of the feed pipe to avoid turbulence and achieve material distribution and rectification, so that the water flow reaches a laminar steady state; the material entering the buffer box passes through the through holes of the distribution plate, and the distribution plate intercepts large particles of impurities in the material. After being filtered by the distribution plate, the material passes through the overflow port and flows smoothly into the gangue collection trough in the product sorting and collection area along the guide channel.

[0009] Under the action of laminar steady-state water flow, gangue particles settle quickly and are the first to settle into the gangue collection trough; while coarse coal slime particles settle slowly and gradually settle in layers after the gangue particles have settled and separated. Coarse coal slime particles overflow from the first baffle to the clean coal collection trough for sedimentation and collection, while fine coal slime settles the slowest and overflows through the second baffle to the fine coal slime collection trough. This forms a stable state in which materials of specific particle size are sorted by density, thereby realizing the separation and collection of gangue particles, coarse coal slime and fine coal slime in different areas and completing the sorting process. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 for Figure 1 A-direction view.

[0013] The components in the attached diagram are labeled as follows: 1. Feed pipe; 2. Buffer box; 2.1. Flow port; 3. Distribution plate; 3.1. Through hole; 4. Product sorting and collection area; 4.1. Gangue collection trough; 4.2. Fine coal collection trough; 4.3. Fine coal slime collection trough; 5. Guide channel; 6. First baffle; 7. Second baffle; 8. Discharge port; 9. Control valve; 10. Strip steel plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] like Figure 1 and Figure 2 As shown, this embodiment provides a steady-state rectification coarse coal slime sorting device, which includes a feed pipe 1, a buffer box 2, a distribution plate 3, a guide channel 5, and a product sorting and collection area 4. The distribution plate 3 is vertically fixed at the bottom of the buffer box 2, and the two sides of the distribution plate 3 are sealed to the inner walls of the two sides of the buffer box 2. Several through holes 3.1 are opened on the distribution plate 3. The feed pipe 1 is fixed through the top of the buffer box 2 on one side of the distribution plate 3. The bottom of the feed pipe 1 inside the buffer box 2 is an outwardly flared horn structure. The coarse coal slime material is fed in through the feed pipe 1. The flow rate of the material is reduced by the flared horn at the bottom of the feed pipe 1 to avoid turbulence and achieve material distribution and rectification. The material entering the buffer box 2 passes through the through holes 3.1 of the distribution plate 3. The distribution plate 3 intercepts large particles of impurities in the material to avoid affecting the subsequent plate pressing and dewatering process.

[0017] The side wall of the buffer box 2 on the other side of the material distribution plate 3 is connected to the product sorting and collection area 4 through the flow port 2.1. The flow port 2.1 is provided with a guide channel 5 extending to the product sorting and collection area 4. The guide channel 5 is a guide area formed by multiple parallel strip steel plates 10, with a spacing of 50mm between each two adjacent strip steel plates 10. After the material filtered by the material distribution plate 3 passes through the flow port 2.1, it flows smoothly into the gangue collection tank 4.1 of the product sorting and collection area 4 along the guide channel 5.

[0018] The product sorting and collection area 4 is divided into a gangue collection trough 4.1, a clean coal collection trough 4.2, and a fine coal slime collection trough 4.3 by a first partition 6 and a second partition 7. The first partition 6 and the second partition 7 are arranged in order from near to far relative to the guide channel 5, and the height of the second partition 7 is higher than that of the first partition 6. Taking advantage of the density difference between coal and gangue, the coarse coal slime particles have a low density, while the gangue particles have a high density. The gravity and medium resistance they experience are different, resulting in different settling velocities within a certain narrow particle size distribution range. Under laminar flow conditions, for materials with similar particle sizes, particles with higher density have a larger final settling velocity, while particles with lower density have a smaller final settling velocity. Under the action of laminar steady-state water flow, gangue particles settle quickly and are the first to settle into the gangue collection trough 4.1. Coarse coal slime particles settle slowly and gradually stratify and settle after the gangue particles have settled and separated. Coarse coal slime particles overflow from the first baffle 6 to the clean coal collection trough 4.2 for sedimentation and collection, while fine coal slime has the slowest settling velocity and overflows through the second baffle 7 to the fine coal slime collection trough 4.3. This forms a stable state in which materials of specific particle sizes are sorted by density, thereby realizing the separation and collection of gangue particles, coarse coal slime, and fine coal slime in different areas and completing the sorting process.

[0019] The bottom of the gangue collection tank 4.1, the clean coal collection tank 4.2, and the fine coal slime collection tank 4.3 are all equipped with discharge ports 8, and each discharge port 8 is equipped with a control valve 9. The liquid level and discharge volume of each collection tank can be adjusted through each control valve 9 to maintain a stable laminar flow state in each collection tank and improve the sorting accuracy and sorting efficiency.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steady-state rectified coarse coal slime separation device, characterized in that, It includes a feed pipe, a buffer box, a material distribution plate, a flow guide channel, and a product sorting and collection area; The fabric plate is vertically fixed at the bottom of the buffer box. The two sides of the fabric plate are sealed and fitted to the inner walls of the two sides of the buffer box. Several through holes are opened on the fabric plate. The feed pipe is fixedly installed on the top of the buffer box on one side of the fabric plate, and the side wall of the buffer box on the other side of the fabric plate is connected to the product sorting and collection area through the flow port. The flow port is provided with the guide groove extending to the product sorting and collection area. The product sorting and collection area is divided into a gangue collection trough, a clean coal collection trough, and a fine coal slime collection trough by a first partition and a second partition. The first partition and the second partition are arranged in order from near to far from the guide trough, and the height of the second partition is higher than that of the first partition. The bottom of each of the gangue collection trough, the clean coal collection trough, and the fine coal slime collection trough is provided with a discharge port, and a control valve is installed on each discharge port.

2. The steady-state rectified coarse coal slime separation device according to claim 1, characterized in that, The bottom of the feed pipe, located inside the buffer box, has an outward-flaring flared opening structure.

3. The steady-state rectified coarse coal slime separation device according to claim 1, characterized in that, The flow channel is a flow guiding area formed by multiple parallel arranged strip steel plates, with a spacing of 50mm between each two adjacent strip steel plates.

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