Metal lithium powder preparation device

Abstract

The utility model discloses a lithium metal powder preparation device which comprises a furnace body, an outlet of the furnace body is horizontally arranged towards the left side, a furnace door is arranged on the front side of the furnace body, a heating chamber is installed in the furnace body, two side-by-side preparation barrels are arranged on the left side of the furnace body, and white oil cooling plates are installed at the tops of inner cavities of the two preparation barrels. The two preparation barrels are mutually connected through a pipeline, the right preparation barrel is connected with an outlet in the left side of the furnace body through a pipeline, a white oil cooler and a negative pressure pump are arranged on the left sides of the two preparation barrels, a feed port of the white oil cooler is connected with the left preparation barrel through a pipeline, and a discharge port of the white oil cooler is connected with the negative pressure pump through a pipeline; according to the lithium metal powder preparation device, graphite is used as a heating body for heating, the uniformity of the furnace temperature can be guaranteed, the highest use temperature can reach 1500 DEG C, the furnace body is made to lie on the side, the furnace door is arranged on the front side of the furnace body, the stability of a thermal field in the furnace body can be guaranteed, and meanwhile feeding is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of metal lithium powder preparation, and specifically relates to a metal lithium powder preparation device. Background Art

[0002] Metal lithium powder is widely used in application fields such as polymers and lithium batteries. Due to the high reactivity, large viscosity, and low melting point of metal lithium, it is difficult to prepare metal lithium powder by mechanical crushing. The existing method for preparing metal lithium powder is to heat metal lithium to make it into lithium vapor, then cool it to form droplets, and finally cool it to make powder. However, the traditional equipment for preparing metal lithium powder has uneven furnace temperature, which seriously affects the production quality of metal lithium powder.

[0003] Therefore, we design a metal lithium powder preparation device here. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a metal lithium powder preparation device for the deficiencies of the existing technology, so as to solve the problems raised in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A metal lithium powder preparation device, including a furnace body, the outlet of the furnace body is placed horizontally to the left, a furnace door is arranged on the front side of the furnace body, a heating chamber is installed inside the furnace body, two preparation barrels are arranged side by side on the left side of the furnace body, white oil cooling plates are installed on the top of the inner cavities of the two preparation barrels, the two preparation barrels are connected to each other through a pipeline, the right preparation barrel is connected to the outlet on the left side of the furnace body through a pipeline, a white oil cooler and a negative pressure pump are arranged on the left side of the two preparation barrels, the feed inlet of the white oil cooler is connected to the left preparation barrel through a pipeline, and the discharge outlet of the white oil cooler is connected to the negative pressure pump through a pipeline;

[0006] A glove box is arranged below the two preparation barrels, the two preparation barrels are both installed on the top of the glove box, discharge ports are arranged at the bottoms of the two preparation barrels, and the discharge ports are located inside the glove box. Two aggregate barrels are arranged inside the glove box, feed inlets are arranged on the tops of the two aggregate barrels, and the feed inlets of the two aggregate barrels are respectively connected to the discharge ports of the two preparation barrels through threads;

[0007] The heating chamber includes a high-purity graphite crucible, a graphite heating element, and a first heat insulation layer. The graphite heating elements are evenly distributed on the outer side of the high-purity graphite crucible, and the first heat insulation layer wraps the whole outside of the high-purity graphite crucible and the graphite heating element.

[0008] Preferably, an air inlet pipe communicating with its inner cavity is installed on the furnace body, a second heat insulation layer is wrapped on the outside of the furnace body, and an observation window is installed on the side of the furnace body.

[0009] Preferably, chain plate heaters are installed on the outer sides of the two preparation barrels and on the outer side of the connecting pipe between the two barrels.

[0010] Preferably, valves are installed at the discharge ports of the two preparation barrels and at the feed ports of the two aggregate barrels.

[0011] Preferably, a serpentine pipe is arranged inside the white oil cooling plate, and the inlet and outlet of the serpentine pipe are both connected to an external white oil cooling circulation system.

[0012] Preferably, the inlet and outlet of the cooling oil of the white oil cooler are both connected to an external white oil cooling circulation system.

[0013] Compared with the prior art, the present utility model provides a device for preparing metallic lithium powder, which has the following beneficial effects:

[0014] In this device for preparing metallic lithium powder, by using graphite as a heating element for heating, the furnace temperature can be ensured to be uniform, and the maximum operating temperature can reach 1500 degrees. By placing the furnace body in a side-lying position and arranging the furnace door on the front side of the furnace body, the thermal field inside the furnace can be ensured to be stable, and at the same time, it is convenient for feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the internal structure of the white oil cooling plate of the present utility model;

[0017] Figure 3 is a schematic diagram of the outer structure of the furnace body of the present utility model.

[0018] Reference numerals: 1, furnace body; 2, heating chamber; 2-1, high-purity graphite crucible; 2-2, graphite heating element; 2-3, first heat insulation layer; 3, inlet pipe; 4, second heat insulation layer; 5, observation window; 6, glove box; 7, preparation barrel; 8, aggregate barrel; 9, white oil cooling plate; 10, white oil filter; 11, negative pressure pump; 12, serpentine pipe; 13, furnace door. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1 - 3, in this implementation: A device for preparing lithium powder includes a furnace body 1. The outlet of the furnace body 1 is placed horizontally to the left. A furnace door 13 is provided on the front side of the furnace body 1. An air inlet pipe 3 communicating with its inner cavity is installed on the furnace body 1. By introducing argon gas into the device through the air inlet pipe 3, the air in the device can be discharged, thereby preventing the lithium metal from reacting violently with oxygen in the air and causing an explosion. The outside of the furnace body 1 is wrapped with a second heat insulation and heat preservation layer 4 to ensure the temperature inside the furnace body 1. An observation window 5 is installed on the side of the furnace body 1 for the user to observe the reaction situation inside the furnace body 1. A heating chamber 2 is installed inside the furnace body 1. The function of the heating chamber 2 is to vaporize the lithium metal in the raw materials. Two preparation barrels 7 are arranged side by side on the left side of the furnace body 1. White oil cooling plates 9 are installed at the top of the inner cavities of the two preparation barrels 7. The function of the white oil cooling plates 9 is to cool the vaporized lithium metal to make it liquefy. The two preparation barrels 7 are connected to each other through a pipeline. Chain plate heaters are installed on the outside of the two preparation barrels 7 and on the outside of the connecting pipe between the two barrels. The function of the chain plate heaters is to control the temperature inside the two preparation barrels 7 and the connecting pipeline between them at about 200 degrees. This temperature exceeds the melting point of lithium metal, which can prevent the lithium metal from solidifying directly in the preparation barrels 7. The right preparation barrel 7 is connected to the outlet on the left side of the furnace body 1 through a pipeline. By discharging materials from the side of the furnace body 1, the thermal field inside the furnace body 1 can be ensured to be stable. A white oil cooler 10 and a negative pressure pump 11 are arranged on the left side of the two preparation barrels 7. The feed inlet of the white oil cooler 10 is connected to the left preparation barrel 7 through a pipeline, and the discharge outlet of the white oil cooler 10 is connected to the negative pressure pump 11 through a pipeline. The function of the white oil cooler 10 is to cool and solidify the remaining vaporized lithium metal in the waste gas generated during the preparation of lithium metal. Under the action of the negative pressure pump 11, the vaporized lithium metal in the furnace body 1 can enter the two preparation barrels 7 and the white oil filter 10 in sequence through the pipeline. A serpentine pipe 12 is arranged inside the white oil cooling plate 9. The inlet and outlet of the serpentine pipe 12 are both connected to an external white oil cooling circulation system. The cooling oil inlet and outlet of the white oil cooler 10 are both connected to an external white oil cooling circulation system. By connecting the inlet and outlet of the serpentine pipe 12 and the white oil cooler 10 to the white oil cooling circulation system, the cooled white oil can circulate inside the serpentine pipe 12 and the white oil cooler 10;

[0021] A glove box 6 is arranged below the two preparation barrels 7. The two preparation barrels 7 are both installed on the top of the glove box 6. Discharge ports are arranged at the bottoms of the two preparation barrels 7, and the discharge ports are located inside the glove box 6. Two aggregate barrels 8 are arranged inside the glove box 6. Feed inlets are arranged at the tops of the two aggregate barrels 8. The feed inlets of the two aggregate barrels 8 are respectively connected to the discharge ports of the two preparation barrels 7 by threads. The liquefied lithium metal will flow from the discharge port at the bottom of the preparation barrel 7 into the aggregate barrel 8 under the action of gravity. Valves are installed at the discharge ports of the two preparation barrels 7 and at the feed inlets of the two aggregate barrels 8. Before removing the aggregate barrel 8, all the valves on the preparation barrel 7 and the aggregate barrel 8 need to be closed to prevent the lithium metal from contacting the air.

[0022] The heating chamber 2 includes a high-purity graphite crucible 2-1, a graphite heating element 2-2, and a first heat-insulating and heat-preserving layer 2-3. The graphite heating element 2-2 is evenly distributed on the outer side of the high-purity graphite crucible 2-1. The first heat-insulating and heat-preserving layer 2-3 wraps the whole outside of the high-purity graphite crucible 2-1 and the graphite heating element 2-2. The heat-insulating material of the first heat-insulating and heat-preserving layer 2-3 uses high-purity 99 porcelain. The graphite heating element 2-2 is connected to the outside through a water-cooled electrode. By using graphite as the heating element for heating, the furnace temperature can be ensured to be uniform, and the maximum operating temperature can reach 1500 degrees, far exceeding the boiling point of metallic lithium.

[0023] The working principle and usage process of the present utility model: When the metallic lithium powder preparation device is in use, the preparation raw materials are put into the heating chamber 2, then the negative pressure pump 11 is started, and at the same time, argon is introduced into the device through the air inlet pipe 3. The raw materials are heated by the heating chamber to vaporize metallic lithium. The vaporized metallic lithium first enters the preparation barrel 7 through a pipeline. Under the cooling of the white oil cooling plate 9, the metallic lithium liquefies and flows into the aggregate barrel 8. Finally, the exhausted gas generated by the preparation enters the white oil filter 10 through a pipeline, and the residual vaporized metallic lithium in the exhausted gas is cooled and solidified by the white oil filter 10.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for preparing metallic lithium powder, comprising a furnace body (1), characterized in that: The furnace body (1) is placed lying on the left side with its outlet facing the left side. A furnace door (13) is arranged on the front side of the furnace body (1). A heating chamber (2) is installed inside the furnace body (1). Two preparation barrels (7) are arranged side by side on the left side of the furnace body (1). White oil cooling plates (9) are installed on the top of the inner cavities of the two preparation barrels (7). The two preparation barrels (7) are connected to each other via pipelines. The preparation barrel (7) on the right side is connected to the outlet on the left side of the furnace body (1) via a pipeline. A white oil cooler (10) and a negative pressure pump (11) are arranged on the left side of the two preparation barrels (7). The feed port of the white oil cooler (10) is connected to the preparation barrel (7) on the left side via a pipeline. The discharge port of the white oil cooler (10) is connected to the negative pressure pump (11) via a pipeline. A glove box (6) is arranged below the two preparation barrels (7), the two preparation barrels (7) are installed on the top of the glove box (6), the bottoms of the two preparation barrels (7) are arranged with discharge ports, and the discharge ports are located inside the glove box (6), two collection barrels (8) are arranged inside the glove box (6), the tops of the two collection barrels (8) are arranged with feed ports, and the feed ports of the two collection barrels (8) are respectively connected to the discharge ports of the two preparation barrels (7) by means of threads; The heating chamber (2) comprises a high-purity graphite crucible (2-1), a graphite heating element (2-2) and a first thermal insulation layer (2-3); the graphite heating element (2-2) is evenly distributed on the outer side of the high-purity graphite crucible (2-1), and the first thermal insulation layer (2-3) wraps around the entire outer side of the high-purity graphite crucible (2-1) and the graphite heating element (2-2).

2. A lithium metal powder preparation device according to claim 1, characterized in that: The furnace body (1) is provided with an air inlet pipe (3) communicating with its inner cavity; the outer side of the furnace body (1) is wrapped with a second heat insulating layer (4); and an observation window (5) is provided on the side of the furnace body (1).

3. A lithium metal powder preparation device according to claim 1, characterized in that: Chain plate heaters are installed on the outsides of the two preparation barrels (7) and on the outsides of the connecting pipes between the two barrels.

4. A lithium metal powder preparation device according to claim 1, characterized in that: Valves are installed at the discharge ports of the two preparation barrels (7) and at the feed ports of the two collection barrels (8).

5. The device for preparing metallic lithium powder according to claim 1, characterized in that: A serpentine tube (12) is arranged inside the white oil cooling plate (9), and the inlet and outlet of the serpentine tube (12) are both connected to an external white oil cooling circulation system.

6. A lithium metal powder preparation device according to claim 1, characterized in that: The cooling oil inlet and outlet of the white oil cooler (10) are both connected to an external white oil cooling circulation system.

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