Sorting device for ore decontamination of coal preparation plant

Abstract

The invention relates to the technical field of coal mine separation, and discloses a separation device for ore decontaminating of a coal preparation plant, which comprises a retention barrel, a discharging hopper fixedly arranged at the top of the retention barrel, and a plurality of guide assemblies arranged in the retention barrel at intervals in the vertical direction, each guide assembly comprises a diversion bin fixedly connected to the inner wall of the retention barrel, a curve notch is formed in the flow dividing bin, the extending path of the curve notch is in an S shape, the channel width of the curve notch is gradually decreased in the gravity direction, and a first jet pipe facing the inner side curved surface of the curve notch is arranged at the S-shaped bent position of the curve notch. Through the arrangement of the guide assembly and the distribution assembly, in the coal mine separation process, a first jet pipe is used for jetting a coal mine mixture in a curved notch, gangue and coal dust and coal slime wrapped by coal are scrubbed, the utilization path is prolonged, and beneficial materials in the sunken position of the gangue are flushed when the gangue rolls back and jumps, so that the separation efficiency of the gangue is improved, and the separation efficiency of the gangue is improved. And the fine-grain clean coal mixed in the gangue layer is gently washed out, floats upwards and is recycled.

Description

Technical Field

[0001] This invention relates to the field of coal mine sorting technology, specifically to a sorting device for ore decontamination in a coal preparation plant. Background Technology

[0002] Coal sorting is a key step in improving coal quality and achieving clean and efficient utilization of coal resources. Its core technology lies in separating coal from impurities such as gangue by utilizing the differences in physical properties (such as density and surface characteristics). Currently, the coal sorting technologies widely used in industry mainly include jigging, heavy media sorting, and flotation. Among them, heavy media sorting has the advantage of high sorting accuracy, but its system is complex, the media recovery cost is high, and there are potential environmental pollution risks.

[0003] However, the above-mentioned separation technologies all exhibit obvious limitations when dealing with difficult coals with wide particle size distributions, especially those containing a lot of coarse coal slime. For example, jigging separation is not effective in separating fine-grained materials and is prone to causing the loss of clean coal. In heavy media separation processes, excessive coarse-grained materials will significantly increase the load on the media system and aggravate equipment wear.

[0004] In the complex material system formed after the initial crushing and screening of raw coal, the sorting environment is more severe. It usually contains coal with large lumps and gangue (commonly fist-sized), granular materials and powdered coal powder, forming a highly mixed mixture of coarse and fine particles. During sorting, spraying treatment may also be carried out. The high-density gangue lumps settle quickly in the medium. Their falling process will have a significant "encapsulation", "trapping" and "submerging" effect on the surrounding fine coal powder. As a result, a large amount of valuable fine coal powder is captured by the gangue layer and dragged to the bottom of the equipment. Finally, it is mixed into the gangue tailings and discharged as waste, resulting in the waste of resources. Summary of the Invention

[0005] The purpose of this invention is to provide a sorting device for ore decontamination in coal preparation plants, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sorting device for decontamination of ore in a coal preparation plant, comprising a retention cylinder, wherein a feeding hopper is fixedly provided on the top of the retention cylinder;

[0007] Multiple guide components are arranged vertically at intervals inside the retention cylinder. Each guide component includes a diversion chamber fixedly connected to the inner wall of the retention cylinder. A curved groove is opened inside the diversion chamber. The extension path of the curved groove is S-shaped, and its width decreases along the direction of gravity. A jet pipe is provided at the S-shaped bend of the curved groove, facing its inner curved surface.

[0008] The distribution assembly includes a water pump, a diversion pipe, a first annular pipe, and a second annular pipe. The water pump is fixedly connected to the retention cylinder, and its output end is connected to the diversion pipe. The diversion pipe is connected to the first annular pipe and the second annular pipe respectively. The inner diameter of the first annular pipe is smaller than that of the second annular pipe. The first annular pipe is connected to each of the first jet pipes through several first pipes. Multiple second jet pipes are fixedly connected to the surface of the second annular pipe along the circumferential direction. The second jet pipes penetrate the side wall of the retention cylinder and extend to its bottom. The spray direction of each second jet pipe is inclined relative to the radial direction of the retention cylinder to form a rotating flow field at the bottom of the retention cylinder.

[0009] An isolation component is coaxially disposed inside the retention cylinder.

[0010] The bottom of the retention cylinder is connected to a drain pipe, which is equipped with a valve for discharging the sorted coal and gangue in sections.

[0011] It also includes a diversion component, which includes a feeding pipe fixedly connected to the retention cylinder, and a conical block is provided at the outlet end of the feeding pipe.

[0012] The isolation assembly includes a partition compartment fixedly connected inside the retention cylinder. A stop block is fixedly connected to the bottom of the partition compartment, and multiple separation holes are provided on the stop block. Several separation blocks are fixed on the surface of the partition compartment.

[0013] The central axes of the partition, the conical block, and the discharge hopper coincide with the central axis of the retention cylinder.

[0014] There are multiple separation blocks, and every two adjacent separation blocks form an inverted V shape. The inverted V-shaped structure is located below the diversion chamber and is used to receive and isolate sorted materials from different diversion chambers.

[0015] Both the first annular tube and the second annular tube are fixed to the storage cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By setting up guiding components and distribution components, during the coal mine sorting process, the coal mixture is jetted inside the curved groove of the jet pipe to scrub the gangue and the coal powder and coal slurry encased in the coal. By extending the path, the beneficial materials in the depression of the gangue are washed when the gangue rolls and jumps, and the fine coal mixed in the gangue layer is gently washed out and floated for recovery.

[0018] Furthermore, when coal and gangue enter the inner wall of the storage cylinder, the low-speed swirling flow of the jet pipe II achieves the final fine separation of clean coal and gangue without affecting the function of the curved groove in the upper part.

[0019] 2. Through the gradual design of the S-shaped path channel with a "wide at the top and narrow at the bottom" curve, the wide inlet handles large particles, and the narrow outlet enhances the separation of fine particles, making it adaptable to materials of different particle sizes. The jet flow combined with gravity settling makes the separation of coal powder, coal lumps and coal gangue more efficient.

[0020] Furthermore, by using a parallel design of a small-radius high-speed annular tube and a large-radius low-speed annular tube, on-demand power allocation was achieved, optimizing power consumption. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall view of the device of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal cross-section of the cylinder in this invention;

[0023] Figure 3 This is a schematic diagram of the re-section of the cylindrical body of the present invention;

[0024] Figure 4 This is a schematic diagram of the cooperation state between the separation block and the diversion chamber of the present invention;

[0025] Figure 5 This is a schematic diagram of the feeding tube and the conical block of the present invention from a different perspective.

[0026] In the diagram: 100, Retention cylinder; 101, Feed hopper; 110, Diversion bin; 111, Curved groove; 112, Jet pipe one; 120, Water pump; 121, Diversion pipe; 122, Ring pipe one; 123, Ring pipe two; 124, Jet pipe two; 130, Feeding pipe; 131, Conical block; 140, Separating bin; 141, Baffle; 142, Separation hole; 143, Separation block. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] This invention discloses a sorting device for decontamination of ore in a coal preparation plant, including a retention cylinder 100, and a feeding hopper 101 fixedly installed on the top of the retention cylinder 100;

[0029] Multiple guide components are arranged vertically at intervals inside the storage cylinder 100. Each guide component includes a diversion chamber 110 fixedly connected to the inner wall of the storage cylinder 100. A curved groove 111 is opened inside the diversion chamber 110. The extension path of the curved groove 111 is S-shaped, and its width decreases along the direction of gravity. A jet pipe 112 is provided at the S-shaped bend of the curved groove 111, facing its inner curved surface.

[0030] The distribution assembly includes a water pump 120, a diversion pipe 121, an annular pipe 122, and an annular pipe 2 123. The water pump 120 is fixedly connected to the storage cylinder 100, and its output end is connected to the diversion pipe 121. The diversion pipe 121 is connected to the annular pipe 122 and the annular pipe 2 123 respectively. The inner diameter of the annular pipe 122 is smaller than that of the annular pipe 2 123. The annular pipe 122 is connected to each jet pipe 112 through several pipes 1. Multiple jet pipes 2 124 are fixedly connected to the surface of the annular pipe 2 123 along the circumferential direction. The jet pipes 2 124 penetrate the side wall of the storage cylinder 100 and extend to its bottom. The spray direction of each jet pipe 2 124 is inclined relative to the radial direction of the storage cylinder 100 to form a rotating flow field at the bottom of the storage cylinder 100.

[0031] The isolation component is coaxially disposed inside the retention cylinder 100.

[0032] The working principle and beneficial effects of this embodiment are as follows:

[0033] First, see 2- Figure 5 The water pump 120 is connected to an external water source, which causes the diversion pipe 121 to drive the annular pipe 122 and the annular pipe 123 to work, respectively driving the jet pipe 112 and the jet pipe 124 to inject water into the storage cylinder 100. When the water level submerges the height of the curved groove 111, the water pump 120 temporarily stops working.

[0034] Secondly, see Figures 2-4 When the mixed coal is fed into the feed hopper 101 through the diversion component, the mixed coal comes into contact with the isolation component, that is, it comes into contact with... Figure 2 After passing through the surface of the partition chamber 140 shown, it then flows down the slope into the openings of the multiple diversion chambers 110 located inside the retention cylinder 100, as detailed in the reference document. Figure 4As the opening of the curved trough 111 gradually narrows, the annular pipe 122 begins to operate when the coal mixture enters the S-shaped surface inside the curved trough 111. Due to the small radius of the annular pipe 122, when it delivers water to the multi-stage jet pipe 112 located on the slope of the S-shaped surface, the jet pipe 112, through the action of the water flow, causes the coal mixture to flow back and roll towards the S-shaped slope inside the curved trough 111, or causes the mixture to bounce at the S-shaped surface. The pressure of the water pump 120 is controlled according to the degree of coal adhesion, causing the coal and gangue mixture to move a certain distance away from the center of gravity of the ground. Subsequently, the jet pipe 111... 2. Briefly stop working and allow the coal and rock mixture of the current stage to move towards the next S-shaped surface of the curved channel 111. Then, the mixture is jetted a second time by the jet pipe 112 at the bend of the next stage. At this time, the coal powder has been separated from the coal gangue and floats to the outside of the curved channel 111, that is, above the liquid level of the diversion chamber 110, as its density gradually increases. A layer of fine coal powder is formed on the surface of the water. After being repeatedly processed by the jet pipe 112 inside the multiple stages of the curved channel 111, the coal and coal gangue mixture is discharged from the part where the width of the channel of the curved channel 111 decreases along the direction of gravity, and is discharged to the isolation component.

[0035] It should be noted that the feeding hopper 101, in conjunction with the surface of the separating bin 140, guides and decelerates the coal ore, finally conveying it to the diversion bin 110, where it enters the curved trough 111. Through multiple stages of S-shaped curved slopes, and simultaneously using the jet pipe 112 to "wash" and "beat" the coal-gangue mixture, the adhesion between the coal and gangue is broken. This "flexible crushing" method greatly promotes the separation of coal and gangue. The targeted, inclined jet pipe 112 impacts the coal-ore mixture, causing it to undergo multiple suspension and cessation cycles. During each cessation window of the jet pipe 112, the difference in settling velocity between particles of different densities under gravity is amplified, allowing heavier gangue to adhere more quickly. At the bottom of the trough, the light material, fine coal, lags behind. Through the repeated action of multiple S-shaped bends in the curved trough 111, the separation effect is continuously enhanced. The curved trough 111 itself extends the flow distance, and together with the jet from the jet pipe 112, it creates a "recirculation and rolling" and "bouncing" effect, so that the material undergoes additional circulation and residence at each bend. This ensures that the separation path is extended within the limited equipment volume inside the curved trough 111. When the coal powder separates from the gangue, due to its low density, it will immediately float to the liquid surface to form a fine coal powder layer, which is collected in advance to avoid loss in subsequent stages. The gangue, on the other hand, will move towards the isolation component first due to its density, and finally fall to the bottom of the retention cylinder 100.

[0036] It is important to note that the width of the curved trough 111 gradually narrows, providing sufficient residence time for the material at the inlet to achieve adequate "loosening" and "pre-separation." Coal and gangue begin to separate in a relatively mild environment, while the outlet flow rate increases, applying stronger shear force to the pre-separated material to promote the final separation of clean coal and gangue, forming a loosening, main separation, and discharge process. As the path of the curved trough 111 narrows and the flow rate increases, its separation force mainly acts on the precise separation of medium-sized particles. For the fine coal powder that has been finally separated, the high-speed water flow can quickly carry it into the main water flow, preventing it from being retained in the gaps of gangue. Secondly, the jet pipe 112 can be installed inside the curved trough 111 or the diversion chamber 110, but the spray direction should still be towards the inner curved surface of the curved trough 111, and there should be at least one jet pipe 112.

[0037] In a further embodiment, a drain pipe is connected to the bottom of the retention cylinder 100, and a valve is installed on the drain pipe for discharging the sorted coal and gangue in sections.

[0038] It also includes a diversion component, which includes a feeding pipe 130 fixedly connected to the retention cylinder 100, and a conical block 131 is provided at the outlet end of the feeding pipe 130.

[0039] The isolation assembly includes a partition chamber 140 fixedly connected inside the retention cylinder 100. A stop block 141 is fixedly connected to the bottom of the partition chamber 140. Multiple separation holes 142 are provided on the stop block 141. Several separation blocks 143 are fixed on the surface of the partition chamber 140.

[0040] The central axis of the partition 140, the conical block 131 and the discharge hopper 101 coincides with the central axis of the retention cylinder 100.

[0041] There are multiple separation blocks 143, and every two adjacent separation blocks 143 form an inverted V shape. The inverted V-shaped structure is located below the diversion chamber 110 and is used to receive and isolate sorted materials from different diversion chambers 110.

[0042] Both the first annular tube 122 and the second annular tube 123 are fixed to the storage cylinder 100.

[0043] The working principle of this embodiment is as follows: First, refer to 2- Figure 5 When the coal mixture is fed into the inlet of the feed pipe 130, the mixture falls onto the conical surface of the conical block 131 by gravity, is then broken up, and then diverted to... Figure 2 The mixture is fed into the slope of the hopper 101, and then the hopper 101 slope guides the mixture to the surface of the conical partition 140. Finally, the coal mixture enters the curved trough 111 and is discharged through the end of the curved trough 111.

[0044] Secondly, after being discharged through the curved trough 111, the initial stratified mixture of coal and gangue passes through the V-shape formed by the two separating blocks 143. At this time, the jet pipes 124 of the annular pipe 123 work simultaneously, collecting the newly fallen gangue and coal towards the lowest point of the inner bottom of the retention cylinder 100. Since the pipe radius of the annular pipe 123 is larger than that of the annular pipe 122, its flow velocity is less than that of the annular pipe 122. That is, the flow velocity of the jet pipe 112 is greater than that of the jet pipe 124. Multiple jet pipes 124 guide the mixture towards the retention cylinder. While conveying at the bottom of the body 100, a swirling flow is generated at the bottom of the retention cylinder 100 to further separate the coal and gangue. Due to the limitations of the separation block 143, the diversion chamber 110, and the partition chamber 140, it does not affect the separation inside the curved trough 111. When multiple jet pipes 124 are working, the coal is lifted up, and the gangue is gradually separated from the coal. The gangue falls to the bottom of the retention cylinder 100, the coal is on the surface of the gangue, and the fine coal sludge floats toward the opening of the baffle 141.

[0045] During operation, primary sorting occurs through the curved slot 111, followed by secondary sorting at the bottom of the retaining cylinder 100. The inclusion of separators 140 and other features prevents back-mixing. The curved slot 111 performs high-intensity "dynamic sorting," focusing on the separation and initial stratification of coal and gangue. The jet tube 124 performs relatively gentle "static sorting," focusing on the final settling and separation of products of different densities. The jet tube 124 has a larger radius and slower flow velocity; during low-speed swirling operation, it facilitates the settling of falling... The mixture is gently pushed to the bottom of the retention cylinder 100. During the slow rotation, the density difference is amplified, the gangue sinks to the bottom the fastest, the lump coal / granular coal is in the middle, and the coal slime floats to the top. At the same time, the high-speed turbulence avoids stirring up the settled gangue again, thus ensuring the high purity of the gangue layer at the bottom. At the same flow rate of the water pump 120, the high-speed water flow is ejected through the jet pipe 112, forming a jet with strong impact and long range. The annular pipe 123 is relatively slower, forming a rotating flow field with a large coverage area but relatively gentle and stable.

[0046] It should be noted that the conical block 131 is only used to process a medium amount of coal-rock mixture. When there is a large amount of coal mixture, a rotary feeder can be installed at the bottom of the conical block 131 to prevent one of the diversion bins 110 from falling into the mine and causing excessive load.

[0047] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sorting device for ore decontamination in a coal preparation plant, characterized in that, include: A storage cylinder (100) is provided with a feeding hopper (101) fixedly installed on the top of the storage cylinder (100). Multiple guide components are arranged vertically at intervals inside the retention cylinder (100). Each guide component includes a diversion chamber (110) fixedly connected to the inner wall of the retention cylinder (100). The diversion chamber (110) has a curved groove (111) inside. The extension path of the curved groove (111) is S-shaped, and its width decreases along the direction of gravity. Each S-shaped bend of the curved groove (111) is provided with a jet pipe (112) facing its inner curved surface. The distribution assembly includes a water pump (120), a branch pipe (121), a first annular pipe (122), and a second annular pipe (123). The water pump (120) is fixedly connected to the retention cylinder (100), and its output end is connected to the branch pipe (121). The branch pipe (121) is connected to the first annular pipe (122) and the second annular pipe (123) respectively. The inner diameter of the first annular pipe (122) is smaller than that of the second annular pipe (123). One (122) is connected to each of the jet tubes (112) through several pipes. Multiple jet tubes (124) are fixedly connected to the surface of the annular tube (123) along the circumferential direction. The jet tubes (124) penetrate the side wall of the retention cylinder (100) and extend to its bottom. The jetting direction of each jet tube (124) is set at an inclination relative to the radial direction of the retention cylinder (100) to form a rotating flow field at the bottom of the retention cylinder (100). An isolation component is coaxially disposed inside the retention cylinder (100).

2. The ore separation device for decontamination in a coal preparation plant according to claim 1, characterized in that: The bottom of the retention cylinder (100) is connected to a drain pipe, and a valve is installed on the drain pipe to discharge the sorted coal and gangue in sections.

3. A coal preparation plant ore decontamination and separation device according to claim 2, characterized in that: It also includes a diversion component, which includes a feeding pipe (130) fixedly connected to the retention cylinder (100), and a conical block (131) is provided at the outlet end of the feeding pipe (130).

4. A coal preparation plant ore decontamination and separation device according to claim 3, characterized in that: The isolation assembly includes a partition compartment (140) fixedly connected inside the retention cylinder (100). A stop block (141) is fixedly connected to the bottom of the partition compartment (140). A plurality of separation holes (142) are provided on the stop block (141). A plurality of separation blocks (143) are fixed on the surface of the partition compartment (140).

5. A coal preparation plant ore decontamination and separation device according to claim 4, characterized in that: The central axes of the partition chamber (140), the conical block (131), and the discharge hopper (101) coincide with the central axis of the retention cylinder (100).

6. A coal preparation plant ore decontamination and separation device according to claim 5, characterized in that: There are multiple separation blocks (143), and every two adjacent separation blocks (143) are inverted V-shaped. The inverted V-shaped structure is located below the diversion bin (110) and is used to receive and isolate sorted materials from different diversion bins (110).

7. A coal preparation plant ore decontamination and separation device according to claim 6, characterized in that: Both the first annular tube (122) and the second annular tube (123) are fixed to the storage cylinder (100).

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