A dry powder slurry mixing device and method

Abstract

The present invention belongs to the field of dry powder slurry mixing, and relates to a dry powder slurry mixing device and method. The dry powder slurry mixing device includes a powder material barrel, a powder material transfer barrel, a powder material slurry mixing tank, and a dust collection type vacuum machine; the powder material transfer barrel includes a high level sensor and a low level sensor; the dust collection type vacuum machine includes a dust chamber, a filtering device, and a clean chamber that are connected in sequence, and the pressure inside the dust collection type vacuum machine is controlled by a vacuum pump; the powder material barrel is connected to the powder material transfer barrel, the top of the powder material transfer barrel is connected to the dust chamber of the dust collection type vacuum machine and a valve V1 is provided on the connecting pipeline, the bottom is connected to the powder material slurry mixing tank and a valve V3 is provided on the connecting pipeline, and the top of the powder material slurry mixing tank is connected to the dust chamber of the dust collection type vacuum machine and a valve V2 is provided on the connecting pipeline. By using the dry powder slurry mixing device and method provided by the present invention, powder material leakage can be avoided, a direct recovery rate of more than 99.5% can be achieved, and the dust content at the operation site can meet the standards.

Description

Technical Field

[0001] The present invention belongs to the field of dry powder slurry mixing, and particularly relates to a dry powder slurry mixing device and a method for mixing dry powder slurry using the device. Background Art

[0002] Dry powder slurry mixing refers to the process of dispersing dry powder in a solution to form a slurry. Currently, in the dry powder slurry mixing process, dry powder is usually directly added to a powder slurry mixing tank storing the solution, and then fully stirred to form a slurry. During the feeding process of the dry powder, dust is extremely likely to be generated. A large amount of dry powder particles are carried in the dust. If the dust is not treated and directly discharged into the atmosphere, it will cause air pollution and damage to the ecological environment. In addition, the amount of powder added during the slurry mixing process will directly affect the batching accuracy of the slurry. Therefore, it is also crucial to control the feeding accuracy of the powder. Summary of the Invention

[0003] The present invention aims to provide a dry powder slurry mixing device that can avoid dust generation and prevent powder leakage during the dry powder slurry mixing and feeding process, as well as a method for mixing dry powder slurry using the device.

[0004] Specifically, the present invention provides a dry powder slurry mixing device, wherein the dry powder slurry mixing device includes a powder barrel, a powder transfer barrel, a powder slurry mixing tank, and a dust collection vacuum machine; the powder transfer barrel includes a barrel body, and a high-level sensor and a low-level sensor respectively arranged at the upper and lower parts of the barrel body; the dust collection vacuum machine includes a dust chamber, a filtering device, and a clean room that are connected in sequence, and the pressure inside the dust collection vacuum machine is controlled by a vacuum pump; the powder barrel is connected to the powder transfer barrel, the top of the powder transfer barrel is connected to the dust chamber of the dust collection vacuum machine and a valve V1 is arranged on the connecting pipeline, the bottom of the powder transfer barrel is connected to the powder slurry mixing tank and a valve V3 is arranged on the connecting pipeline, and the top of the powder slurry mixing tank is connected to the dust chamber of the dust collection vacuum machine and a valve V2 is arranged on the connecting pipeline.

[0005] Further, the powder barrel is a non-closed container, and the powder transfer barrel and the powder slurry mixing tank are closed containers.

[0006] Further, the powder transfer barrel further includes a pulse vibrator, and the pulse vibrator is arranged on the side wall of the barrel body of the powder transfer barrel and the height is between the high-level sensor and the low-level sensor.

[0007] Further, a stirrer is arranged inside the powder slurry mixing tank.

[0008] Further, the dust collection vacuum machine further includes a dust collection cabinet arranged at the bottom of the filtering device.

[0009] Further, the dust collection vacuum machine further includes a pulse jet arranged at the top of the filtering device.

[0010] Further, the dust collection vacuum machine includes an upper compartment, a lower left compartment, and a lower right compartment; the upper compartment is a clean room; the filtering device is located in the lower right compartment, and the gas outlet of the filtering device communicates with the upper compartment. A cavity formed between the outer wall of the filtering device and the inner wall of the lower right compartment is a dust chamber. The inlets of the dust chamber communicate with the powder transfer barrel and the top of the powder slurry mixing tank respectively, and the outlet of the dust chamber communicates with the inlet of the filtering device. A dust collection cabinet is arranged at the bottom of the dust chamber directly opposite the filtering device; the vacuum pump is arranged in the lower left compartment and communicates with the clean room.

[0011] Further, the filtering device is a filter cartridge, a filter element, or a filter bag.

[0012] Further, the interception accuracy of the filtering device is ≥2 μm.

[0013] Further, the dry powder slurry mixing device automatically controls the opening and closing of the vacuum pump, valve V1, valve V2, and valve V3.

[0014] The present invention also provides a method for dry powder slurry mixing using the above dry powder slurry mixing device.

[0015] Further, the particle size D of the dry powder 50 ≤50 μm and the moisture content ≤10%.

[0016] By setting up the powder transfer barrel, the present invention enables the feeding and slurry mixing processes to be automatically sensed and switched for linkage operation, thus perfectly combining the feeding and slurry mixing processes. It can well avoid dusting and material waste during the dry powder feeding process, making the dust operation leak-free, achieving a direct recovery rate of more than 99.5%, and the dust content at the operation site can meet the standards. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0018] Figure 1 It is a specific structural schematic diagram of the dry powder slurry mixing device provided by the present invention.

[0019] Description of the Reference Numerals in the Drawings

[0020] 1 - powder barrel; 2 - powder transfer barrel; 3 - powder slurry mixing tank; 4 - dust collection vacuum machine; 21 - high level sensor; 22 - low level sensor; 23 - pulse vibrator; 41 - dust chamber; 42 - filtering device; 43 - clean room; 44 - vacuum pump; 45 - dust collection cabinet. Specific Embodiments

[0021] The following is a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0022] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, high, low, left, right, bottom, top" generally refer to the directions of the dry powder slurry mixing device of the present invention during operation, that is, the directions shown in the accompanying drawings.

[0023] As Figure 1 shown, the dry powder slurry mixing device provided by the present invention includes: a powder bucket 1, a powder transfer bucket 2, a powder slurry mixing tank 3, and a dust collection vacuum machine 4; the powder transfer bucket 2 includes a bucket body, and a high level sensor 21 and a low level sensor 22 respectively arranged at the upper and lower parts of the bucket body; the dust collection vacuum machine 4 includes a dust chamber 41, a filtering device 42, and a clean room 43 that are connected in sequence, and the pressure in the dust collection vacuum machine is controlled by a vacuum pump 44; the powder bucket 1 is connected to the powder transfer bucket 2, the top of the powder transfer bucket 2 is connected to the dust chamber 41 of the dust collection vacuum machine 4, and a valve V1 is arranged on the connecting pipeline, and the bottom is connected to the powder slurry mixing tank 3, and a valve V3 is arranged on the connecting pipeline, and the top of the powder slurry mixing tank 3 is connected to the dust chamber 41 of the dust collection vacuum machine 4, and a valve V2 is arranged on the connecting pipeline. Among them, the powder bucket 1 is a non-closed container, and the powder transfer bucket 2 and the powder slurry mixing tank 3 are closed containers.

[0024] When working, the powder to be slurried is placed in the powder bucket 1, a certain amount of the required liquid is placed in the powder slurry mixing tank 3, the valve V1 is opened, the valves V2 and V3 are closed, the vacuum pump 44 is started to evacuate, the powder in the powder bucket 1 is fed into the powder transfer bucket 2 through the pipeline, and the dust is sucked into the dust chamber 41 of the dust collection vacuum machine 4 through the vacuum pipe; as the powder is added, when the powder triggers the high level sensor 21, the valve V1 is closed, the valves V2 and V3 are opened, the powder is fed from the powder transfer bucket 2 into the powder slurry mixing tank 3, and the dust in the powder slurry mixing tank 3 is sucked into the dust chamber 41 through the vacuum pipe, and the dust contained therein is intercepted by the filtering device 42, and the gas passes through the filtering device 42 and enters the clean room 43 and then is discharged; the dust on the filtering device 42 can be collected regularly and then returned to the powder bucket 1; after the powder in the powder transfer bucket 2 falls to an empty state, when the powder triggers the low level sensor, the valves V2 and V3 are closed, the dust collection vacuum machine 4 is shut down, the powder slurry mixing tank 3 is started to stir the slurry sufficiently, and after the stirring time is reached, the powder slurry mixing tank pump B1 is started to transport the slurry to the target container to complete the slurry mixing.

[0025] As Figure 1As shown, the high-level sensor 21 of the powder transfer barrel 2 is located at the upper part of its barrel body, while the low-level sensor 22 is located at the lower part of its barrel body. By monitoring the material level height, the opening and closing of valves V1, V2, and V3 are controlled, so as to realize the orderly progress of feeding, slurry preparation, and dust recovery. At the same time, the change in the material level height monitored by the material level sensor can also reflect the added amount of powder, thereby controlling the feeding accuracy of the powder. The powder transfer barrel 2 preferably further includes a pulse vibrator 23, and the pulse vibrator 23 is arranged on the side wall of the barrel body of the powder transfer barrel 2 and its height is between the high-level sensor 21 and the low-level sensor 22. At this time, vibration can be used to assist in discharging materials to accelerate the discharging process and save discharging time. The pulse vibrator 23 can be arranged at any position on the side wall of the barrel body of the powder transfer barrel 2, and can be arranged on a single side wall or on both side walls. In addition, in order to be more conducive to the powder entering the powder slurry preparation tank 3, the bottom of the powder transfer barrel 2 is preferably designed in a funnel shape.

[0026] Preferably, a stirrer 31 is arranged in the powder slurry preparation tank 3, so that the materials can be more evenly mixed during the slurry preparation process. The stirrer 31 can be a mechanical stirrer or an electric stirrer. The slurry preparation time in the powder slurry preparation tank 3 can be manually controlled or controlled automatically. In addition, a powder slurry preparation tank pump B1 is arranged on the pipeline connecting the powder slurry preparation tank 3 with the outside. When the stirring time reaches, the slurry preparation is completed, and the powder slurry preparation tank pump B1 is turned on to transport the slurry to the target container to complete the slurry preparation.

[0027] As described above, the dust collection vacuum machine 4 includes a dust chamber 41, a filtering device 42, and a clean room 43 that are connected in sequence, and the pressure inside the dust collection vacuum machine is controlled by a vacuum pump 44. Preferably, the dust collection vacuum machine 4 further includes a dust collection cabinet 45 arranged at the bottom of the filtering device 42 and a pulse jet device arranged at the top of the filtering device 42. At this time, the dust on the filtering device 42 can be periodically collected centrally and then returned to the powder barrel 1 to realize the recycling of raw materials. According to a specific embodiment of the present invention, such as Figure 1As shown, the dust collecting vacuum machine 4 includes an upper compartment, a lower left compartment and a lower right compartment; the upper compartment is a clean room 43; the filtering device 42 is located in the lower right compartment and the gas outlet of the filtering device 42 communicates with the upper compartment (i.e., the clean room 43). A cavity formed between the outer wall of the filtering device 42 and the inner wall of the lower right compartment is a dust chamber 41. The inlet of the dust chamber 41 communicates with the powder transfer barrel 2 and the top of the powder slurry mixing tank 3 respectively, and the outlet of the dust chamber 41 communicates with the inlet of the filtering device 42. A dust collection cabinet 45 is arranged at the bottom of the dust chamber 41 directly opposite the filtering device 42; the vacuum pump 44 is arranged in the lower left compartment and communicates with the clean room 43. The dust chamber 41, the filtering device 42 and the clean room 43 in the dust collecting vacuum machine 4 are well blocked and the seals are intact. The interception accuracy of the filtering device 42 can be controlled according to the fineness of the powder, usually ≥2μm. The specific structure of the filtering device 42 can be a conventional choice in the art and can be various existing filtering devices capable of separating dust and gas, specifically it can be filter cartridges, filter elements, filter bags, etc. Those skilled in the art can all know this and will not be elaborated here. When working, the vacuum pump 44 is turned on to pump vacuum, and the dust from the powder transfer barrel 2 or the powder slurry mixing tank 3 enters the dust chamber 41 of the dust collecting vacuum machine 4 through the vacuum pipe. The powder contained in the dust is intercepted by the filtering device 42, while the gas component passes through the filtering device 42 and enters the clean room 43 and then is discharged. The dust on the filtering device 42 can be regularly collected in the dust collection cabinet 45 by means such as pulse jetting, and then returned to the powder barrel 1 for reuse.

[0028] The dry powder slurry mixing device can be manually controlled or automatically controlled, and preferably automatically controlled. When automatically controlled, first turn on the vacuum pump 44 of the dust collecting vacuum machine 4, open the valve V1, close the valves V2 and V3, and the powder in the powder barrel 1 is fed into the powder transfer barrel 2. When the powder level in the powder transfer barrel 2 touches the high level sensor 21, the automatic switch is switched, the valve V1 is closed, the valves V2 and V3 are opened, and the powder in the powder transfer barrel 2 is fed into the powder slurry mixing tank 3. When the powder level touches the low level sensor 22, the valves V2 and V3 are closed, the vacuum pump 44 stops, the powder slurry mixing tank 3 is started to stir and mix the slurry, and after the slurry mixing is completed, the slurry is discharged.

[0029] The present invention also provides a method for dry powder slurry mixing using the above dry powder slurry mixing device.

[0030] The main improvement of the dry powder slurry mixing method provided by the present invention lies in the adoption of a new dry powder slurry mixing device, and the selection of dry powder and solvent types, the solid-liquid ratio of the slurry, etc. can all be conventional choices in the art. Those skilled in the art can all know this and will not be elaborated here.

[0031] The dry powder slurry mixing device provided by the present invention is particularly suitable for slurrying powders with a laser particle size D 50 ≤50 μm and a moisture content ≤ 10% (such as cobalt carbonate powder).

[0032] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0033] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above specific embodiments can be combined in any suitable way. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0034] Furthermore, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A dry powder slurry mixing device, characterized in that, the dry powder slurry mixing device includes a powder barrel, a powder transfer barrel, a powder slurry mixing tank and a dust collection vacuum machine; the powder transfer barrel includes a barrel body, and a high level sensor and a low level sensor respectively arranged at the upper and lower parts of the barrel body; the dust collection vacuum machine includes a dust chamber, a filtering device and a clean chamber connected in sequence, and the pressure in the dust collection vacuum machine is controlled by a vacuum pump; the powder barrel is connected to the powder transfer barrel, the top of the powder transfer barrel is connected to the dust chamber of the dust collection vacuum machine and a valve V1 is arranged on the connecting pipeline, and the bottom is connected to the powder slurry mixing tank and a valve V3 is arranged on the connecting pipeline, and the top of the powder slurry mixing tank is connected to the dust chamber of the dust collection vacuum machine and a valve V2 is arranged on the connecting pipeline.

2. The dry powder slurry mixing device according to claim 1, characterized in that, the powder barrel is a non-closed container, and the powder transfer barrel and the powder slurry mixing tank are closed containers.

3. The dry powder slurry mixing device according to claim 1, characterized in that, the powder transfer barrel further includes a pulse vibrator, and the pulse vibrator is arranged on the side wall of the barrel body of the powder transfer barrel and the height is between the high level sensor and the low level sensor.

4. The dry powder slurry mixing device according to claim 1, characterized in that, the dust collection vacuum machine further includes a dust collection cabinet arranged at the bottom of the filtering device.

5. The dry powder slurry mixing device according to claim 1, characterized in that, the dust collection vacuum machine further includes a pulse jet arranged at the top of the filtering device.

6. The dry powder slurry mixing device according to claim 1, characterized in that, the dust collection vacuum machine includes an upper compartment, a lower left compartment and a lower right compartment; the upper compartment is a clean chamber; the filtering device is located in the lower right compartment and the gas outlet of the filtering device is connected to the upper compartment, and the cavity formed between the outer wall of the filtering device and the inner wall of the lower right compartment is the dust chamber, the inlet of the dust chamber is respectively connected to the tops of the powder transfer barrel and the powder slurry mixing tank, and the outlet of the dust chamber is connected to the inlet of the filtering device, and a dust collection cabinet is arranged at the position of the bottom of the dust chamber directly facing the filtering device; the vacuum pump is arranged in the lower left compartment and is connected to the clean chamber.

7. The dry powder slurry mixing device according to claim 1, characterized in that, the filtering device is a filter cartridge, a filter element or a filter bag; the interception accuracy of the filtering device is ≥2μm.

8. The dry powder slurry mixing device according to any one of claims 1-7, characterized in that, the dry powder slurry mixing device adopts automatic control to open and close the vacuum pump, valve V1, valve V2 and valve V3.

9. A method for mixing dry powder into slurry using the dry powder slurry mixing device according to any one of claims 1-8.

10. The method according to claim 9, characterized in that, The particle size D of the dry powder 50 ≤50 μm and the moisture content ≤ 10%.

Images