Thickener feeding device and thickener

Abstract

The utility model discloses a thickener feeding device and a thickener, and belongs to the technical field of mineral processing equipment, the thickener feeding device comprises a stirring barrel, the first end of the stirring barrel is connected with an ore pulp feeding pipe, and the second end of the stirring barrel is connected with a thickener feeding pipe; the thickener feeding pipe is used for being communicated with a feeding bin in the thickener, a flow blocking section is arranged at the tail end of the thickener feeding pipe, the ore pulp feeding pipe is connected with a flocculating agent feeding pipe, and a flocculating agent control valve assembly is arranged on the flocculating agent feeding pipe to control the adding amount of a flocculating agent; the flow choking assemblies are arranged in the flow choking section, multiple rows of flow choking assemblies are arranged along the inner wall of the flow choking section in an annular array mode, and each flow choking assembly comprises a first flow choking structure and a second flow choking structure which are arranged in a staggered mode; an ore pulp shunting and backflow channel is formed between the first flow choking structure and the second flow choking structure so as to shunt and flow back ore pulp in the feeding channel in the center of the flow choking section, and therefore the flow speed of the ore pulp is reduced. The device can reduce unit consumption of a flocculating agent and avoid mixing of the thickener.

Description

Technical Field

[0001] The utility model relates to the technical field of mineral processing equipment, in particular to a thickener feeding device. In addition, the utility model also relates to a thickener comprising the thickener feeding device. Background Art

[0002] Thickener is a solid-liquid separation equipment based on gravity sedimentation. It is usually a cylindrical shallow trough with a conical bottom made of concrete, wood or metal welded plates as structural materials. With the help of a slow-running rake installed in the thickener, the thickened underflow slurry is discharged from the underflow port at the bottom of the thickener. The upper part of the thickener produces a relatively clean clarified liquid (overflow) which is discharged from the annular chute at the top. Thickeners are widely used in production sites such as hydrometallurgy, ore dressing plants, and chemical plants that require solid-liquid enrichment and separation. For example, a feeding device and a thickener for a thickener disclosed in a Chinese patent with patent publication number CN214971984U can improve the sedimentation effect of the slurry, but its overall structure is relatively simple, and it is difficult to solve problems such as high unit consumption of flocculants.

[0003] Since some mineral processing products have fineness (-0.074mm accounts for more than 90%), low density, high mud content, and a large amount of flotation reagents adsorbed on the surface, the sedimentation rate in the thickener is slow. During the thickening process of the thickener, flocculants need to be added and fully mixed to increase their sedimentation rate and avoid thickener mixing.

[0004] However, in the actual production process, it was found that due to the fine particle size and high mud content of some ore dressing products processed by the ore dressing plant, the unit consumption of flocculants in the thickener was high when processing this ore; and gas was brought in when feeding the ore, resulting in a greater impact on the slurry in the mixing tank when the slurry was fed. Therefore, in response to the above problems, the ore dressing plant needs to modify the feeding device of the thickener that processes this part of the product to increase the mixing degree of the flocculant and the ore to improve the effect, reduce the unit consumption of flocculants and avoid thickener mixing. Utility Model Content

[0005] The utility model provides a thickener feeding device to solve the technical problems of high unit consumption of flocculant when processing mineral processing products with finer particle size and larger mud content and how to avoid thickener running and mixing.

[0006] At the same time, the utility model also provides a thickener comprising the thickener feeding device.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A thickener feeding device, comprising:

[0009] A stirring barrel, wherein a first end of the stirring barrel is connected to a slurry feed pipe, a second end of the stirring barrel is connected to a thickener feed pipe, the thickener feed pipe is used to communicate with a feed bin in the thickener, a flow blocking section is provided at the tail end of the thickener feed pipe, the slurry feed pipe is connected to a flocculant feed pipe, and a flocculant control valve assembly for controlling the amount of flocculant added is provided on the flocculant feed pipe;

[0010] A baffle assembly is provided in the baffle section, and a plurality of rows of baffle assemblies are arranged in a circular array along the inner wall of the baffle section. The baffle assembly includes a first baffle structure and a second baffle structure which are staggeredly arranged along the axial direction of the baffle section, and a slurry diversion and reflux channel is formed between the first baffle structure and the second baffle structure. The diversion and reflux channel is used to divert and reflux the slurry in the feed channel on the central axis of the baffle section, thereby reducing the slurry flow rate.

[0011] Furthermore, the slurry feed pipe is communicated with a feed port at a lower middle portion of the mixing barrel, and the thickener feed pipe is communicated with a discharge port at an upper middle portion of the mixing barrel.

[0012] Furthermore, the flocculant control valve assembly comprises a PLC system and a control valve installed on the flocculant inlet pipe, and the PLC system is used to adjust the opening of the control valve to regulate the flow rate of the flocculant inlet pipe.

[0013] Furthermore, a flow meter is installed on the slurry feed pipe, and the flow meter is connected to the PLC system, and the flow meter is used to transmit slurry flow data to the PLC system.

[0014] Furthermore, a stirring assembly is provided in the stirring barrel, and the stirring assembly includes a stirring rod, a driving unit for driving the stirring rod to rotate, and a stirring blade. The stirring rod is vertically arranged in the stirring barrel, and the stirring blade is arranged in a ring array on the stirring rod. A plurality of through holes are opened on the stirring blade.

[0015] Furthermore, the stirring rod is provided with multiple sections, the multiple sections of the stirring rod are connected in sequence along the axial direction, and each section of the stirring rod is provided with stirring blades in a circular array.

[0016] Furthermore, the first flow-blocking structure and the second flow-blocking structure are both arranged to be inclined toward the material incoming direction of the thickener feed pipe.

[0017] Furthermore, the first flow-blocking structure is configured as a "U"-shaped structure with an opening inclined toward the material incoming direction of the thickener feed pipe, the second flow-blocking structure is disposed at a middle position of the first flow-blocking structure and separates the opposite sides of the inner cavity of the first flow-blocking structure into a diversion channel and a reflux channel, the second flow-blocking structure is provided with a guide notch at a bottom wall position of the first flow-blocking structure to form a reflux inflection point connecting the diversion channel and the reflux channel, the diversion channel is used to divert the slurry in the feed channel and then enter the reflux channel through the reflux inflection point, and the slurry in the reflux channel re-merges into the feed channel, thereby reducing the slurry flow rate in the flow-blocking section.

[0018] Furthermore, a buffer is provided at the angle between the first flow-blocking structure and the flow-blocking section, and a surface of the buffer in contact with the slurry is a curved surface structure to guide the slurry at the reflux inflection point to flow into the reflux channel.

[0019] According to another aspect of the utility model, a thickener is also provided, which includes the above-mentioned thickener feeding device.

[0020] The utility model has the following beneficial effects:

[0021] The thickener feeding device of the utility model fully stirs the flocculant and the slurry by setting a stirring barrel, so that the flocculant can fully and more efficiently react with the fine particles in the slurry. At the same time, a flocculant control valve assembly is provided on the flocculant inlet pipe to control the amount of flocculant added, ensure the stability of the flocculant dosage, and reduce the unit consumption of flocculant. In addition, since the slurry entering the thickener has a certain speed, a flow blocking section is provided at the tail end of the thickener feed pipe, and a flow blocking assembly is provided in the flow blocking section to reduce the discharge speed of the thickener feed pipe, and the thickener feed pipe is placed below the thickener liquid level, so that the slurry is fed in smoothly and evenly, avoiding the phenomenon of slurry flipping during feeding, and ensuring that the thickener is not easy to run.

[0022] The thickener of the utility model also has the above-mentioned beneficial effects.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described above at the same time. In addition to the purposes, features and advantages described above, the present invention also has other purposes, features and advantages. The present invention will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the stirring barrel part of the preferred embodiment of the utility model.

[0027] Figure 3 It is a schematic diagram of the position of the flow-blocking section of the preferred embodiment of the utility model.

[0028] Figure 4 It is a structural schematic diagram of a flow-blocking component of a preferred embodiment of the utility model.

[0029] Legend: 1. Slurry feed pipe; 2. Flow meter; 3. PLC system; 4. Control valve; 5. Flocculant inlet pipe; 6. Mixing barrel; 7. Mixing assembly; 8. Thickener feed pipe; 9. Overflow weir; 10. Flow blocking section; 11. Feed bin; 12. First flow blocking structure; 13. Second flow blocking structure; 14. Feed channel; 15. Diversion channel; 16. Reflux inflection point; 17. Reflux channel. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0031] Please refer to the attached drawings, which are structural schematic diagrams of a thickener feeding device and a preferred embodiment of the thickener provided by the utility model.

[0032] A thickener feeding device and a thickener, comprising:

[0033] A stirring barrel 6, wherein the first end of the stirring barrel 6 is connected to a slurry feed pipe 1, and the second end of the stirring barrel 6 is connected to a thickener feed pipe 8, wherein the thickener feed pipe 8 is used to communicate with a feed bin 11 in the thickener, and a flow blocking section 10 is provided at the tail end of the thickener feed pipe 8, and the slurry feed pipe 1 is connected to a flocculant feed pipe 5, and the flocculant feed pipe 5 is provided with a flocculant control valve assembly for controlling the amount of flocculant added;

[0034] A baffle assembly is provided in the baffle section 10, and a plurality of rows of baffle assemblies are arranged in a circular array along the inner wall of the baffle section 10. The baffle assembly includes a first baffle structure 12 and a second baffle structure 13 which are staggered along the axial direction of the baffle section 10, and a slurry diversion and reflux channel is formed between the first baffle structure 12 and the second baffle structure 13, and the diversion and reflux channel is used to divert and reflux the slurry of the feed channel 14 on the central axis of the baffle section 10, thereby reducing the slurry flow rate.

[0035] The utility model fully stirs the flocculant and the slurry by setting a stirring barrel 6, so that the flocculant can fully and more efficiently react with the fine particles in the slurry. At the same time, a flocculant control valve assembly is set on the flocculant inlet pipe 5 to control the amount of flocculant added, ensure the stability of the flocculant dosage, and reduce the unit consumption of flocculant. In addition, since the slurry entering the thickener has a certain speed, a flow blocking section 10 is set at the tail end of the thickener feed pipe 8, and a flow blocking assembly is set in the flow blocking section 10 to reduce the discharge speed of the thickener feed pipe 8, and the thickener feed pipe 1 is placed below the thickener liquid level, so that the slurry is fed in steadily and evenly, avoiding the phenomenon of slurry turning over when feeding, and ensuring that the thickener is not easy to run.

[0036] Preferably, please refer to Figure 1 and Figure 2 As shown, the slurry feed pipe 1 is connected to the feed port at the lower middle portion of the mixing barrel 6 , and the thickener feed pipe 8 is connected to the discharge port at the upper middle portion of the mixing barrel 6 .

[0037] It is understandable that feeding the slurry from the lower part of the stirring barrel 6 can facilitate the stirring assembly 7 to fully stir, improve the mixing degree of the slurry and the flocculant, and thus improve the reaction effect. The inlet end of the thickener feed pipe 8 is located below the liquid level of the stirring barrel 6, which can prevent gas from being brought in when feeding the ore, and can also reduce the impact of the slurry in the stirring barrel 6 when the slurry is fed. It should be noted that an overflow weir 9 is provided in the thickener to maintain the stability of the upper liquid layer.

[0038] Preferably, please refer to Figure 2 As shown, the flocculant control valve assembly includes a PLC system 3 and a control valve 4 installed on the flocculant inlet pipe 5 . The PLC system 3 is used to adjust the opening of the control valve 4 to control the flow rate of the flocculant inlet pipe 5 .

[0039] In some embodiments, a flow meter 2 is installed on the slurry feed pipe 1 , and the flow meter 2 is connected to the PLC system 3 . The flow meter 2 is used to transmit slurry flow data to the PLC system 3 .

[0040] It is understandable that the PLC system 3 can control the amount of flocculant added by adjusting the opening of the control valve 4 on the flocculant inlet pipe 5 according to the amount of slurry in the slurry feed pipe 1 and the flocculant unit consumption set by the PLC system 3, thereby ensuring stable flocculant dosage and reducing flocculant unit consumption.

[0041] Preferably, a stirring assembly 7 is provided in the stirring barrel 6, and the stirring assembly 7 includes a stirring rod, a driving unit for driving the stirring rod to rotate, and a stirring blade. The stirring rod is vertically arranged in the stirring barrel 6, and the stirring blade is arranged in a ring array on the stirring rod, and a plurality of through holes are opened on the stirring blade.

[0042] It is understandable that the stirring blades are provided with a plurality of through holes to allow the materials to be diverted, thereby improving the stirring effect of the stirring blades, promoting a more complete mixing of the slurry and the flocculant, and improving the reaction effect. It should be noted that the driving unit may be a motor, which may be arranged on the top cover of the stirring barrel 6, and the output shaft of the motor is connected to the stirring rod, which is driven to rotate by the motor.

[0043] In some embodiments, the stirring rod is provided with multiple sections, the multiple sections of the stirring rod are connected in sequence along the axial direction, and each section of the stirring rod is provided with stirring blades in a circular array.

[0044] It can be understood that each section of the stirring rod can be connected by a flange and bolts, and the multi-section stirring rod as a whole has easy length adjustment, which can adapt to the stirring requirements of stirring barrels 6 of different heights, and each section of the stirring rod is provided with stirring blades, which can more fully stir materials at different heights, which is conducive to improving the degree of mixing.

[0045] Preferably, please refer to Figure 4 As shown, the first flow-blocking structure 12 and the second flow-blocking structure 13 are both arranged to be inclined toward the material incoming direction of the thickener feed pipe 8 .

[0046] It can be understood that the diversion and reflux channels formed by the inclined first flow-blocking structure 12 and the second flow-blocking structure 13 are also inclined and face the incoming material direction, which can play a better role in diversion and flow blocking, and is conducive to improving the effect of reducing the slurry flow rate.

[0047] Preferably, please refer to Figure 4 As shown, the first flow-blocking structure 12 is configured as a "U"-shaped structure with its opening inclined toward the incoming material direction of the thickener feed pipe 8, the second flow-blocking structure 13 is disposed at the middle position of the first flow-blocking structure 12 and separates the opposite sides of the inner cavity of the first flow-blocking structure 12 into a diversion channel 15 and a reflux channel 17, the second flow-blocking structure 13 is provided with a guide notch at the bottom wall position of the first flow-blocking structure 12 to form a reflux inflection point 16 connecting the diversion channel 15 and the reflux channel 17, the diversion channel 15 is used to divert the slurry of the feed channel 14 and then enter the reflux channel 17 through the reflux inflection point 16, and the slurry of the reflux channel 17 re-enters the feed channel 14, thereby reducing the slurry flow rate of the flow-blocking section 10.

[0048] It can be understood that the center position of the blocking section 10 is the feed channel 14, and multiple rows of blocking components are arranged around the feed channel 14. There is a gap between the second blocking structure 13 and the inner wall of the blocking section 10 to form a reflux inflection point 16. The reflux inflection point 16, the diversion channel 15 and the reflux channel 17 together realize the diversion and reflux of the slurry, so that part of the slurry flows backward, which can effectively reduce the flow rate of the slurry, including the uniform discharge and fall of the slurry, avoiding the slurry from turning over when feeding the ore, and making the thickener less likely to run.

[0049] Preferably, please refer to Figure 4 As shown, a buffer is provided at the angle between the first flow-blocking structure 12 and the flow-blocking section 10 , and a surface of the buffer in contact with the slurry is a curved surface structure to guide the slurry at the reflux inflection point 16 to flow into the reflux channel 17 .

[0050] It can be understood that an acute angle is formed between the inclined first flow-blocking structure 12 and the flow-blocking section 10, and the buffer is arranged at the angle. When the slurry hits the buffer, the slurry flows more smoothly into the return channel 17 through the guiding effect of the arc surface of the buffer, thereby realizing the buffering and guiding effect of the buffer, improving the smoothness of the slurry flow, reducing the impact force on the flow-blocking component, and ensuring the service life of the flow-blocking component.

[0051] According to another aspect of the utility model, a thickener is also provided, which includes the above-mentioned thickener feeding device.

[0052] The thickener of the utility model also has the above-mentioned beneficial effects.

[0053] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0054] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection of the utility model.

Claims

1. A thickener feeding device, characterized in that: include: A stirring barrel (6), wherein a first end of the stirring barrel (6) is connected to a slurry feed pipe (1), a second end of the stirring barrel (6) is connected to a thickener feed pipe (8), the thickener feed pipe (8) is used to communicate with a feed bin (11) in the thickener, a flow blocking section (10) is provided at the tail end of the thickener feed pipe (8), the slurry feed pipe (1) is connected to a flocculant feed pipe (5), and a flocculant control valve assembly for controlling the amount of flocculant added is provided on the flocculant feed pipe (5); A flow-blocking assembly, wherein the flow-blocking assembly is arranged in the flow-blocking section (10), and the flow-blocking assembly is arranged in a plurality of rows in a circular array along the inner wall of the flow-blocking section (10), and the flow-blocking assembly comprises a first flow-blocking structure (12) and a second flow-blocking structure (13) which are arranged in an axially staggered manner along the flow-blocking section (10), and a slurry diversion and reflux channel is formed between the first flow-blocking structure (12) and the second flow-blocking structure (13), and the diversion and reflux channel is used to divert and reflux the slurry of the feed channel (14) on the central axis of the flow-blocking section (10), thereby reducing the slurry flow rate.

2. A thickener feeding device according to claim 1, characterized in that: The slurry feed pipe (1) is in communication with a feed port at a lower middle portion of the stirring barrel (6), and the thickener feed pipe (8) is in communication with a discharge port at an upper middle portion of the stirring barrel (6).

3. A thickener feeding device according to claim 1, characterized in that: The flocculant control valve assembly comprises a PLC system (3) and a control valve (4) installed on the flocculant inlet pipe (5); the PLC system (3) is used to adjust the opening of the control valve (4) to control the flow rate of the flocculant inlet pipe (5).

4. A thickener feeding device according to claim 3, characterized in that: A flow meter (2) is installed on the slurry feed pipe (1), and the flow meter (2) is connected to the PLC system (3). The flow meter (2) is used to transmit slurry flow data to the PLC system (3).

5. A thickener feeding device according to claim 1, characterized in that: A stirring assembly (7) is arranged in the stirring barrel (6), and the stirring assembly (7) comprises a stirring rod, a driving unit for driving the stirring rod to rotate, and a stirring blade. The stirring rod is vertically arranged in the stirring barrel (6), and the stirring blades are arranged in an annular array on the stirring rod. A plurality of through holes are opened on the stirring blades.

6. A thickener feeding device according to claim 5, characterized in that: The stirring rod is provided with multiple sections, the multiple sections of the stirring rod are connected in sequence along the axial direction, and each section of the stirring rod is provided with stirring blades in an annular array.

7. A thickener feeding device according to claim 1, characterized in that: The first flow-blocking structure (12) and the second flow-blocking structure (13) are both arranged to be inclined toward the direction of the material coming from the thickener feed pipe (8).

8. A thickener feeding device according to claim 7, characterized in that: The first flow-blocking structure (12) is configured as a "U"-shaped structure with its opening inclined toward the material supply direction of the thickener feed pipe (8); the second flow-blocking structure (13) is disposed at a middle position of the first flow-blocking structure (12) and separates two opposite sides of an inner cavity of the first flow-blocking structure (12) into a diversion channel (15) and a return channel (17); the second flow-blocking structure (13) is provided with a flow-guiding notch at a bottom wall position of the first flow-blocking structure (12) to form a return inflection point (16) connecting the diversion channel (15) and the return channel (17); the diversion channel (15) is used to divert the slurry of the feed channel (14) and enter the return channel (17) through the return inflection point (16); and the slurry of the return channel (17) then re-enters the feed channel (14), thereby reducing the slurry flow rate of the flow-blocking section (10).

9. A thickener feeding device according to claim 8, characterized in that: A buffer is provided at the angle between the first flow-blocking structure (12) and the flow-blocking section (10), and a surface of the buffer in contact with the slurry is a curved surface structure to guide the slurry at the reflux inflection point (16) to flow into the reflux channel (17).

10. A thickener, characterized in that: It comprises a thickener feeding device as described in any one of claims 1 to 9.

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