Pipeline structure for preventing tantalum powder oxidation fire and electromagnetic separation device

Abstract

The invention provides a pipeline structure for preventing tantalum powder oxidation fire and an electromagnetic separation device, and relates to the technical field of electromagnetic separation equipment, the pipeline structure comprises a feeding pipeline, a feeding temperature measuring element, a first blanking pipeline, a first inert gas pipeline and a blanking temperature measuring element; the bottom end of the feeding pipeline is communicated with a feeding hole of the electromagnetic adsorption mechanism; a feeding valve is arranged in the feeding pipeline; the feeding temperature measuring element is arranged in the feeding pipeline; the top end of the first blanking pipeline is communicated with a blanking port of the electromagnetic adsorption mechanism; a blanking valve is arranged in the first blanking pipeline; one end of the first inert gas pipeline is connected with an inert gas source, and the other end of the first inert gas pipeline is communicated with the first blanking pipeline; the blanking temperature measuring element is arranged in the first blanking pipeline; the temperature of the magnetic separation pipeline can be monitored, the fire behavior or potential combustion hidden danger can be controlled, and serious fire accidents of tantalum powder in the magnetic separation process are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic magnetic separation equipment, and particularly relates to a pipeline structure for preventing tantalum powder from oxidizing and catching fire and an electromagnetic magnetic separation device. Background Art

[0002] An electromagnetic magnetic separator is a magnetic separation device that generates a magnetic field by energizing an electromagnetic wire and uses a closed magnetic system for separation. This device is mainly used for mineral separation, impurity removal, and material purification in fields such as mines, coal, power, and metallurgy.

[0003] A conventional electromagnetic magnetic separator includes a magnetic grid plate and an electromagnetic coil. The magnetic grid plate has a vertically through channel to facilitate the passage of powder through the magnetic grid plate. When the electromagnetic coil is energized, a magnetic field is formed, causing the magnetic grid plate to form a magnetic field of 20,000 - 30,000 gauss. Magnetic materials are adsorbed by the electromagnetic grid plate, and non-magnetic materials fall into the inclined tube of the electromagnetic magnetic separator and enter the non-magnetic material storage bucket; when the electromagnetic coil is de-energized, the magnetism of the electromagnetic grid plate disappears, causing the magnetic materials to break away from the magnetic grid plate and fall into the storage bucket for magnetic substances; this process is repeated until the magnetic separation of the materials is completed.

[0004] Sodium-reduced tantalum powder may contain weakly magnetic tantalum-iron, tantalum-nickel and other alloys during the reduction process. During the powder making process, shovels, plates, etc. used are all weakly magnetic stainless steels; the presence of these weakly magnetic impurities will reduce the purity of tantalum powder; for high-end capacitor-grade tantalum powder, it will cause an increase in leakage current; to remove these weakly magnetic impurities, a magnetic separator with a strong magnetic field must be used, and an electromagnetic magnetic separator is the best choice.

[0005] However, sodium-reduced tantalum powder is an active metal powder, with a particle size of approximately 5 - 380 microns (sieve analysis result). Even a little spark, even an electrostatic spark, can easily cause oxidation and ignition. During the electromagnetic magnetic separation process, tantalum powder and trace amounts of strongly magnetic impurities move and rub against each other in the electromagnetic field, and it is very easy to form micro-sparks or friction during the electromagnetic magnetic separation process, which can cause tantalum powder oxidation. If not controlled, it is very easy to cause a fire accident.

[0006] Therefore, a solution needs to be designed to solve the above technical problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a pipeline structure for preventing tantalum powder from oxidizing and catching fire and an electromagnetic magnetic separation device to solve the problems existing in the above prior art, which can monitor the temperature of the magnetic separation pipeline and control the occurred fire or potential combustion hazards to avoid serious fire accidents during the magnetic separation of tantalum powder.

[0008] To achieve the above purpose, the present invention provides the following solutions:

[0009] A pipeline structure for preventing tantalum powder from oxidizing and catching fire, including a feeding pipeline, a feeding temperature measuring element, a first blanking pipeline, a first inert gas pipeline, and a blanking temperature measuring element; the top end of the feeding pipeline is used for feeding, and the bottom end of the feeding pipeline is communicated with the feeding port of the electromagnetic adsorption mechanism; a feeding valve is arranged in the feeding pipeline; the feeding temperature measuring element is arranged in the feeding pipeline and is located below the feeding valve for monitoring the temperature in the feeding pipeline; the top end of the first blanking pipeline is communicated with the blanking port of the electromagnetic adsorption mechanism for non-magnetic materials to fall; a blanking valve is arranged in the first blanking pipeline; one end of the first inert gas pipeline is connected to an inert gas source, and the other end of the first inert gas pipeline is communicated with the first blanking pipeline. The connection position of the first inert gas pipeline and the first blanking pipe is above the blanking valve; the blanking temperature measuring element is arranged in the first blanking pipeline and is located above the blanking valve for monitoring the temperature in the first blanking pipeline.

[0010] As an embodiment, the first blanking pipeline has an inclined pipe section, the bottom of the inclined pipe section has an opening, and a switching valve is arranged at the opening. It also includes a second blanking pipeline for magnetic materials to fall. The top end of the second blanking pipeline is fixedly connected to the bottom of the first blanking pipeline and is communicated with the opening.

[0011] As an embodiment, it also includes a second inert gas pipeline. One end of the second inert gas pipeline is connected to an inert gas source, and the other end of the second inert gas pipeline is communicated with the second blanking pipeline.

[0012] As an embodiment, the feeding valve includes a feeding flap, a first rotating shaft, and a first rotation driving mechanism. The feeding flap is hinged to the inner wall of the feeding pipeline through the first rotating shaft, and the output shaft of the first rotation driving mechanism is fixedly connected to the first rotating shaft for driving the feeding flap to rotate to realize the connection and closing of the feeding channel.

[0013] As an embodiment, the blanking valve includes a blanking flap, a second rotating shaft, and a second rotation driving mechanism. The blanking flap is hinged to the inner wall of the blanking pipeline through the second rotating shaft, and the output shaft of the second rotation driving mechanism is fixedly connected to the second rotating shaft for driving the blanking flap to rotate to realize the connection and closing of the first blanking channel.

[0014] As an embodiment, both the first rotation driving mechanism and the second rotation driving mechanism are rotating motors.

[0015] As an embodiment, both the feeding temperature measuring element and the blanking temperature measuring element are thermocouples.

[0016] The present invention also provides an electromagnetic magnetic separation device, which includes a feeder, an electromagnetic adsorption mechanism, and the pipeline structure for preventing tantalum powder from oxidizing and catching fire as described above: the feeder is used for feeding; the electromagnetic adsorption mechanism includes an electromagnetic grid plate and an electromagnetic coil. After the electromagnetic coil is electrified, the electromagnetic grid plate can adsorb magnetic materials; the top end of the feeding pipeline is communicated with the material dropping port of the feeder, and the bottom end of the feeding pipeline is communicated with the feeding port of the electromagnetic adsorption mechanism.

[0017] As an embodiment, it further includes a magnetic material storage barrel and a non-magnetic material storage barrel; the magnetic material storage barrel is arranged below the material dropping port of the second material dropping pipeline; the non-magnetic material storage barrel is arranged below the material dropping port of the first material dropping pipeline.

[0018] As an embodiment, the feeder is a vibrating feeder.

[0019] The present invention has the following technical effects compared with the prior art:

[0020] By arranging a feeding temperature measuring element and a material dropping temperature measuring element in the feeding pipeline and the material dropping pipeline, the present invention can monitor the temperature of the magnetic separation pipeline, especially the pipelines on the upper and lower sides of the magnetic separation and sorting machine where there is intense friction of materials, and combine the feeding valve and the material dropping valve to close the above-mentioned magnetic separation pipeline to avoid the intensification of the fire. Then, an inert gas is introduced to dilute oxygen, reduce the temperature, and inhibit the combustion of tantalum powder, thereby avoiding the occurrence of fire accidents during the magnetic separation of tantalum powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of an electromagnetic magnetic separation device in an embodiment of the present invention.

[0023] Description of the reference numerals:

[0024] 1. Vibrating feeder; 2. Feeding pipeline; 3. Feeding temperature measuring element; 4. Electromagnetic coil; 5. First inert gas pipeline; 6. Material dropping temperature measuring element; 7. Material dropping valve; 8. First material dropping pipeline; 9. Non-magnetic material storage barrel; 10. Feeding valve; 11. Electromagnetic grid plate; 12. Switching valve; 13. Second material dropping pipeline; 14. Second inert gas pipeline; 15. Magnetic material storage barrel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0026] The purpose of the present invention is to provide a pipeline structure and an electromagnetic magnetic separation device for preventing tantalum powder from oxidizing and catching fire, so as to solve the problems existing in the prior art, be able to monitor the temperature of the magnetic separation pipeline, and control the occurred fire or potential combustion hazards, and avoid serious fire accidents during the magnetic separation of tantalum powder.

[0027] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1:

[0029] As Figure 1 shown, this embodiment provides a pipeline structure for preventing tantalum powder from oxidizing and catching fire, including a feed pipeline 2, a feed temperature measuring element 3, a first blanking pipeline 8, a first inert gas pipeline 5 and a blanking temperature measuring element 6; the feed pipeline 2 is usually vertically arranged, the top end of the feed pipeline 2 is connected to a feeding device to achieve feeding, and the bottom end of the feed pipeline 2 is communicated with the feed inlet of the electromagnetic adsorption mechanism. A feed valve 10 is arranged in the feed pipeline 2, which can block the feed on the one hand and seal the middle and lower parts (the part below the feed valve 10) of the feed pipeline 2 on the other hand; the feed temperature measuring element 3 is arranged in the feed pipeline 2 and is located below the feed valve 10 for monitoring the temperature in the feed pipeline 2. The top end of the first blanking pipeline 8 is communicated with the blanking port of the electromagnetic adsorption mechanism for non-magnetic materials to fall; a blanking valve 7 is arranged in the first blanking pipeline 8 to seal the top part of the first blanking pipeline 8; one end of the first inert gas pipeline 5 is connected to an inert gas source, and the other end of the first inert gas pipeline 5 is communicated with the first blanking pipeline 8, and the communication position is above the blanking valve 7; the inert gas source can select argon or other gases, preferably select gas components with a density greater than that of air, and preferably select low-temperature gases. The blanking temperature measuring element 6 is arranged in the first blanking pipeline 8 and is located above the blanking valve 7 for monitoring the temperature in the first blanking pipeline 8.

[0030] In use, the above pipeline structure is installed on the electromagnetic magnetic separation mechanism. During the feeding process, if the temperature measured by the feeding temperature measuring element 3 or the blanking temperature measuring element 6 in the feeding pipeline or the first blanking pipeline exceeds the set magnetic separation working temperature, it indicates that the tantalum powder raw material has burned or is about to burn during the falling process (if no combustion occurs, it may be due to the oxidation caused by friction of the ultrafine powder, resulting in a temperature rise). At this time, the feeding valve 10 and the blanking valve 7 are closed, and the pipeline part between the feeding valve 10 and the blanking valve 7 and the electromagnetic magnetic separation mechanism are enclosed (this enclosure process is not completely sealed, and there are gaps between the feeding valve 10 and the blanking valve 7 and the inner wall of the pipeline), forming an enclosed pipe section to prevent the top material from continuing to enter the enclosed pipe section and also prevent the burned tantalum powder or the tantalum powder with a combustion hazard from falling into the tantalum powder storage barrel or entering other subsequent equipment; then, inert gas is introduced into the enclosed pipe section through the first inert gas pipeline 5. On the one hand, the inert gas can dilute the oxygen concentration in the enclosed pipe section. On the other hand, after the inert gas is introduced, the temperature in the enclosed pipeline can be reduced. The two aspects work together to inhibit the combustion of tantalum powder. If a gas with a density greater than that of air, such as argon, is used, as the argon is introduced, the air will be extruded from the gap between the blanking valve 7 and the blanking pipeline, gradually reducing the oxygen content and further reducing the possibility of the tantalum powder continuing to burn. When the temperature in the enclosed pipe section reaches the normal value, the feeding valve 10 and the blanking valve 7 are opened, and the magnetic separation operation continues.

[0031] Thus, in this embodiment, by arranging the feeding temperature measuring element 3 and the blanking temperature measuring element 6 in the feeding pipeline 2 and the blanking pipeline, the temperature of the magnetic separation pipeline, especially the pipelines on the upper and lower sides of the magnetic separation separator where there is intense friction of the material, can be monitored. Combining the feeding valve 10 and the blanking valve 7 to enclose the above magnetic separation pipeline can prevent the fire from intensifying. Then, inert gas is introduced to dilute the oxygen and reduce the temperature to inhibit the combustion of tantalum powder, thereby avoiding serious fire accidents during the magnetic separation of tantalum powder.

[0032] In this embodiment, both the feeding temperature measuring element 3 and the blanking temperature measuring element 6 are thermocouples.

[0033] In this embodiment, the first blanking pipeline 8 has an inclined pipe section. The bottom of the inclined pipe section has an opening, and a switching valve 12 is arranged at the opening. It also includes a second blanking pipeline 13 for the falling of magnetic materials. The top of the second blanking pipeline 13 is fixedly connected to the bottom of the first blanking pipeline 8 and is communicated with the opening. The switching valve 12 can change the connection state between the first blanking pipeline 8, the second blanking pipeline 13 and the blanking port of the electromagnetic magnetic separation mechanism. Figure 1In this case, the electromagnetic magnetic separation mechanism is energized to adsorb magnetic materials. The first blanking pipe 8 is connected to the electromagnetic magnetic separation mechanism, enabling tantalum powder to fall from the first blanking pipe 8 into the non-magnetic material storage bucket. When the valve piece of the switching valve 12 rotates to the right, the top of the first blanking pipe 8 can be closed, connecting the second blanking pipe 13 to the electromagnetic magnetic separation mechanism. The electromagnetic magnetic separation mechanism is de-energized, the magnetic force disappears, and the magnetic materials adsorbed by the electromagnetic magnetic separation mechanism fall from the second blanking pipe 13 into the magnetic material storage bucket 15.

[0034] This embodiment further includes a second inert gas pipeline 14. One end of the second inert gas pipeline 14 is connected to an inert gas source, and the other end of the second inert gas pipeline 14 is connected to the second blanking pipe 13. The materials falling into the second blanking pipe 13 are magnetic materials, usually tantalum-containing alloys, which also have a certain combustible ability. When the magnetic materials are in the blanking stage and the feeding temperature measuring element 3 measures a relatively high temperature inside the pipeline, inert gas can be introduced through the second inert gas pipeline 14 to prevent the magnetic materials from catching fire. This process can also be coordinated with the closing of the feeding valve 10. Of course, a blanking valve 7 can also be provided below the connection position of the second inert gas pipeline 14 and the second blanking pipe 13 to prevent the burning magnetic materials from falling into the magnetic material storage bucket 15.

[0035] Control valves are provided on both the first inert gas pipeline 5 and the second inert gas pipeline 14 in this embodiment.

[0036] In this embodiment, the feeding valve 10 includes a feeding flap, a first rotating shaft, and a first rotation driving mechanism. The feeding flap is hinged to the inner wall of the feeding pipe 2 through the first rotating shaft, and the output shaft of the first rotation driving mechanism is fixedly connected to the first rotating shaft to drive the feeding flap to rotate, realizing the connection and closing of the feeding channel.

[0037] In this embodiment, the blanking valve 7 includes a blanking flap, a second rotating shaft, and a second rotation driving mechanism. The blanking flap is hinged to the inner wall of the blanking pipe through the second rotating shaft, and the output shaft of the second rotation driving mechanism is fixedly connected to the second rotating shaft to drive the blanking flap to rotate, realizing the connection and closing of the first blanking channel.

[0038] Similarly, the switching valve 12 can include a switching flap, a third rotating shaft, and a third rotation driving mechanism. The switching flap is hinged at the connection position of the first blanking pipe 8 and the second blanking pipe 13 through the third rotating shaft, and the output shaft of the third rotation driving mechanism is fixedly connected to the third rotating shaft to drive the switching flap to rotate, realizing the switching of the connection states between the electromagnetic magnetic separation mechanism and the first blanking channel and the second blanking channel.

[0039] In this embodiment, the first rotation driving mechanism, the second rotation driving mechanism, and the third rotation driving mechanism are all rotating motors.

[0040] Embodiment 2:

[0041] As Figure 1 shown, this embodiment provides an electromagnetic magnetic separation device, including a feeder, an electromagnetic adsorption mechanism, and the pipeline structure for preventing tantalum powder from oxidizing and catching fire as described above: the feeder is used for feeding; the electromagnetic adsorption mechanism includes an electromagnetic grid plate 11 and an electromagnetic coil 4. After the electromagnetic coil 4 is energized, the electromagnetic grid plate 11 can adsorb magnetic materials; the top end of the feeding pipeline is communicated with the blanking port of the feeder, and the bottom end of the feeding pipeline is communicated with the feeding port of the electromagnetic adsorption mechanism. The electromagnetic adsorption mechanism is a common device in this field, and its specific structure, working principle, and operation method are well known to those skilled in the art, and this embodiment will not elaborate on them.

[0042] This embodiment further includes a magnetic material storage barrel 15 and a non-magnetic material storage barrel 9; the magnetic material storage barrel 15 is arranged below the blanking port of the second blanking pipeline 13; the non-magnetic material storage barrel 9 is arranged below the blanking port of the first blanking pipeline 8.

[0043] In this embodiment, the feeder is a vibrating feeder 1.

[0044] This embodiment is also provided with a control system, which is communicatively connected to the vibrating feeder 1, the electromagnetic coil 4, the feeding temperature measuring element 3, the blanking temperature measuring element 6, the feeding valve 10, the blanking valve 7, the solenoid valve on the first inert gas pipeline 5, and the solenoid valve on the second inert gas pipeline 14. When the feeding temperature measuring element 3 and / or the blanking temperature measuring element 6 measures that the temperature in the magnetic separation pipeline exceeds the set temperature, the vibrating feeder 1 stops feeding, the feeding valve 10 and the blanking valve 7 close, and the first inert gas pipeline 5 and / or the second inert gas pipeline 14 is conducted to introduce inert gas into the magnetic separation pipeline to avoid causing a fire accident.

[0045] Adaptations made according to actual needs are all within the protection scope of the present invention.

[0046] Specific examples are applied in the present invention to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A pipeline structure for preventing tantalum powder from oxidizing and catching fire, characterized in that, Comprising: A feed pipeline, the top end of the feed pipeline is used for feeding, and the bottom end of the feed pipeline is communicated with the feed inlet of the electromagnetic adsorption mechanism; a feed valve is arranged in the feed pipeline; A feed temperature measuring element, the feed temperature measuring element is arranged in the feed pipeline and is located below the feed valve, and is used for monitoring the temperature in the feed pipeline; A first blanking pipeline, the top end of the first blanking pipeline is communicated with the blanking outlet of the electromagnetic adsorption mechanism, and is used for non-magnetic materials to fall; a blanking valve is arranged in the first blanking pipeline; A first inert gas pipeline, one end of the first inert gas pipeline is connected to an inert gas source, and the other end of the first inert gas pipeline is communicated with the first blanking pipeline; the connection position of the first inert gas pipeline and the first blanking pipe is located above the blanking valve; And a blanking temperature measuring element, the blanking temperature measuring element is arranged in the first blanking pipeline and is located above the blanking valve, and is used for monitoring the temperature in the first blanking pipeline.

2. The pipeline structure for preventing tantalum powder from oxidizing and catching fire according to claim 1, wherein, The first blanking pipeline has an inclined pipe section, the bottom of the inclined pipe section has an opening, a switching valve is arranged at the opening, and further comprises a second blanking pipeline, the second blanking pipeline is used for magnetic materials to fall, and the top end of the second blanking pipeline is fixedly connected to the bottom of the first blanking pipeline and is communicated with the opening.

3. The pipeline structure for preventing tantalum powder from oxidizing and catching fire according to claim 2, wherein Further comprises a second inert gas pipeline, one end of the second inert gas pipeline is connected to an inert gas source, and the other end of the second inert gas pipeline is communicated with the second blanking pipeline.

4. The pipeline structure for preventing tantalum powder from oxidizing and catching fire according to claim 1, wherein The feed valve comprises a feed flap, a first rotating shaft and a first rotation driving mechanism, the feed flap is hinged to the inner wall of the feed pipeline through the first rotating shaft, and the output shaft of the first rotation driving mechanism is fixedly connected to the first rotating shaft, and is used for driving the feed flap to rotate to realize the communication and closing of the feed channel.

5. The pipeline structure for preventing tantalum powder from oxidizing and catching fire according to claim 4, characterized in that, The blanking valve comprises a blanking flap, a second rotating shaft and a second rotation driving mechanism, the blanking flap is hinged to the inner wall of the blanking pipeline through the second rotating shaft, and the output shaft of the second rotation driving mechanism is fixedly connected to the second rotating shaft, and is used for driving the blanking flap to rotate to realize the communication and closing of the first blanking channel.

6. The pipeline structure for preventing tantalum powder from oxidizing and catching fire according to claim 5, characterized in that, The first rotation driving mechanism and the second rotation driving mechanism are both rotating motors.

7. The pipeline structure for preventing tantalum powder from oxidizing and catching fire according to claim 1, characterized in that, The feed temperature measuring element and the blanking temperature measuring element are both thermocouples.

8. An electromagnetic magnetic separation device, characterized in that, Comprising: A distributor, the distributor is used for feeding; An electromagnetic adsorption mechanism, the electromagnetic adsorption mechanism comprises an electromagnetic grid plate and an electromagnetic coil, after the electromagnetic coil is electrified, the electromagnetic grid plate can adsorb magnetic materials; The pipeline structure for preventing tantalum powder from oxidizing and catching fire according to any one of claims 2 to 7; the top end of the feed pipeline is communicated with the blanking outlet of the distributor, and the bottom end of the feed pipeline is communicated with the feed inlet of the electromagnetic adsorption mechanism.

9. The electromagnetic magnetic separation device according to claim 8, characterized in that, Further comprising: A magnetic material storage barrel, the magnetic material storage barrel is arranged below the blanking outlet of the second blanking pipeline; And a non-magnetic material storage barrel, the non-magnetic material storage barrel is arranged below the blanking outlet of the first blanking pipeline.

10. The electromagnetic magnetic separation device according to claim 8, characterized in that, The distributor is a vibrating distributor.

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