CN218345558U - Metal lithium electrolytic bath deslagging structure - Google Patents

Abstract

The utility model provides a metal lithium electrolytic cell deslagging structure capable of preventing lithium slag from gathering between a cathode and a separation net, relating to the technical field of electrolytic lithium. Metal lithium electrolytic cell slagging-off structure collects the cover including cell body, chlorine to and set up at the cell body separate net, positive pole and negative pole, the negative pole centers on the positive pole sets up, chlorine is collected the cover and is set up the top at the positive pole, separate the net setting between positive pole and negative pole, the upper end that separates the net is collected the cover with chlorine and is connected, one side that the lower extreme that separates the net is located the negative pole is equipped with a plurality of air blow holes around separating net interval arrangement, just the air blow hole is located the negative pole and separates the clearance between the net, the air blow hole is linked together with the blast pipe that sets up outside the cell body. The utility model can better ensure the normal operation of the electrolytic cell.

Description

Metal lithium electrolytic bath deslagging structure

Technical Field

The utility model relates to an electrolytic lithium technical field, concretely relates to metal lithium electrolysis trough deslagging structure.

Background

The molten salt electrolysis method is the only method for industrially producing the metal lithium at present, and the metal lithium electrolysis bath is the key equipment of the electrolysis process. The metal lithium electrolytic cell comprises a cell body, a chlorine gas collecting cover, a separation net, an anode and a cathode, wherein the separation net, the anode and the cathode are arranged in the cell body, the anode is made of graphite and is columnar, the cathode is cylindrical and is arranged on the outer side of the anode in a surrounding mode, the chlorine gas collecting cover is arranged above the anode to collect chlorine gas generated by the anode, the separation net is arranged between the anode and the cathode to separate metal lithium and chlorine gas, and the upper end of the separation net is connected with the chlorine gas collecting cover.

Because the electrolytic cell continuously runs at night, lithium slag is generated between the cathode and the anode, and most of the generated slag is concentrated between the cathode and the separation net and is difficult to remove. As the slag is continuously accumulated in the electrolytic cell, the electrolytic cell has the conditions of short circuit of the cathode and the anode, and the like, thereby directly causing the abnormal operation of the electrolytic cell.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a metal lithium electrolytic bath deslagging structure capable of preventing lithium slag from gathering between a cathode and a separation net.

The utility model provides a technical scheme that its technical problem adopted is: metal lithium electrolytic cell slagging-off structure collects the cover including cell body, chlorine to and set up at the cell body separate net, positive pole and negative pole, the negative pole centers on the positive pole sets up, chlorine is collected the cover and is set up the top at the positive pole, separate the net setting between positive pole and negative pole, the upper end that separates the net is collected the cover with chlorine and is connected, one side that the lower extreme that separates the net is located the negative pole is equipped with a plurality of air blow holes around separating net interval arrangement, just the air blow hole is located the negative pole and separates the clearance between the net, the air blow hole is linked together with the blast pipe that sets up outside the cell body.

Further, the air outlet direction of the air blowing holes faces to the cathode.

Furthermore, the included angle between the air outlet direction of the air blowing holes and the cathode is a, and a is more than or equal to 20 degrees and less than or equal to 45 degrees.

Furthermore, a plurality of adapter tubes which are in one-to-one correspondence with the air blowing holes are arranged in the tank body, the air blowing holes are formed at the tube openings at one ends of the adapter tubes, and the other ends of the adapter tubes are bent from the lower part of the separation net and then are communicated with the air feeding pipe from the gap between the separation net and the anode.

Furthermore, a lithium collecting cover connected with the groove body is arranged above the cathode, and a lithium pumping pipe with one end arranged in the inner cavity of the lithium collecting cover is arranged on the lithium collecting cover.

Further, the lithium collecting cover is connected with the groove body in a vertical sliding mode, and a screw rod for adjusting the height of the lithium collecting cover is arranged between the lithium collecting cover and the groove body.

The beneficial effects of the utility model are that: the utility model discloses a metal lithium electrolytic bath slagging-off structure can be to the negative pole and separate and send into argon gas between the net through the hole of blowing, argon gas can follow the negative pole and separate the clearance lower part between the net upwards pass through gradually, thereby the metal lithium that produces the negative pole, lithium sediment in time takes out the lithium salt liquid of molten condition and floats on the lithium salt liquid, thereby avoid the lithium sediment gathering at the negative pole and separate between the net, can prevent to appear because of the condition of lithium sediment gathering short circuit between the negative pole, can guarantee electrolytic bath normal operating better.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the arrangement of the outlet direction of the blowpipe;

shown in the figure: the device comprises a tank body 1, an anode 2, a cathode 3, a separation net 4, a chlorine gas collecting cover 5, a lithium pumping pipe 6, a lithium collecting cover 7, an air feeding pipe 8, an adapter pipe 9, a screw rod 10 and an air blowing hole 81.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1, the deslagging structure of the metal lithium electrolytic cell of the present invention comprises a cell body 1, a chlorine gas collecting cover 5, and a separation net 4, an anode 2 and a cathode 3 disposed in the cell body 1. The anode 2 can adopt an up-insertion or down-insertion fixing structure, and in the figure, the anode 2 is a down-insertion fixing structure. The cathode 3 is arranged around the anode 2, the chlorine gas collecting cover 5 is arranged above the anode 2, the separation net 4 is arranged between the anode 2 and the cathode 1, and the upper end of the separation net 4 is connected with the chlorine gas collecting cover 5. The lower end of the separation net 4 is provided with a plurality of air blowing holes 81 arranged around the separation net 4 at intervals at one side of the cathode 3, the air blowing holes 81 are positioned in a gap between the cathode 3 and the separation net 4, and the air blowing holes 81 are communicated with the air feeding pipe 8 arranged outside the tank body 1.

The blowing holes 81 are usually evenly distributed on the outside of the screen 4. The spacing between the blow holes 81 is typically between 50-200 mm.

When the electrolytic cell works, argon is supplied to the air blowing holes 81 through the air supply pipe 8, metal lithium is generated at the cathode 3 of the electrolytic cell, chlorine is generated at the anode, and the chlorine finally enters the chlorine collecting cover 5. Because the gas blowing holes 81 are positioned in the gap between the cathode 3 and the separation net 4, argon flowing out of the gas blowing holes 81 gradually passes upwards from the lower part of the gap between the cathode 3 and the separation net 4, so that metal lithium and lithium slag generated by the cathode 3 are taken out of lithium salt liquid in a molten state in time and float on the lithium salt liquid, the lithium slag is prevented from being gathered between the cathode and the separation net, and the condition of short circuit between the cathode and the anode due to the gathering of the lithium slag can be prevented. In addition, due to the arrangement of the air blowing holes 81, the lithium salt liquid can be accelerated to pass through between the cathode 1 and the separation net in the air exhaust process through the air blowing holes 81, and the electrolysis efficiency of the metal lithium can also be improved.

Specifically, the air outlet direction of the air blowing holes 81 may be in various directions, such as: facing the cathode, vertically upwards, downwards and the like, because the metal lithium is generated from the cathode, preferably, the air outlet direction of the air outlet 81 faces the cathode 3, namely, the included angle between the air outlet direction of the air outlet 81 and the cathode 3 is a, and a is more than or equal to 0 degrees and less than or equal to 90 degrees. Therefore, the argon flowing out of the air blowing holes 81 can flow upwards closer to the cathode 3, which is more beneficial to timely taking out lithium metal generated by the cathode, and can avoid or reduce the phenomenon that the argon passes through the meshes of the separation net 4 and enters the gap between the separation net 4 and the anode 2, and the phenomenon that the argon is mixed into chlorine can be avoided and reduced. Preferably, as shown in FIG. 2, the included angle between the air outlet direction of the air blowing holes 81 and the cathode 3 is a, and a is greater than or equal to 20 degrees and less than or equal to 45 degrees.

The air blowing holes can be arranged on an annular pipeline arranged around the separation net 4 and communicated with the air supply pipe 8 through the annular pipeline. Because the clearance between negative pole and separating the net is less, not only inconvenient annular duct is arranged, and the annular duct need be arranged between separating net 4 and negative pole 3 when arranging, can influence lithium salt liquid and get into between negative pole and the separating net, and this can cause great influence to electrolytic efficiency. In the embodiment of the utility model provides an in, be equipped with many switching pipes 9 with the one-to-one of gas hole 81 in the cell body 1, the mouth of pipe of switching pipe 9 one end forms gas hole 81, switching pipe 9's the other end is followed and is separated the net 4 below and buckle the back and upwards be linked together through with blast pipe 8 from separating the clearance between net 4 and the positive pole 2. Therefore, the arrangement is convenient, and the adapter tube 9 only has certain influence on the flow of the less molten salt liquid between the anode and the separation net 4, so that the influence on the electrolysis efficiency is small.

In order to collect metal lithium conveniently, a lithium collecting cover 7 connected with the tank body 1 is arranged at a certain height above the cathode 3, and a lithium pumping pipe 6 with one end arranged in an inner cavity of the lithium collecting cover 7 is arranged on the lithium collecting cover 7. After being blown out from the gap between the cathode and the separation net 4, the metal lithium and the lithium slag can float on the liquid surface in the lithium collecting cover 7, and the lithium liquid on the liquid surface can be timely extracted through the lithium extracting pipe 6. It will be appreciated that in order to facilitate the evacuation of argon from the lithium collector cap, a vent is required in the lithium collector cap.

The lithium collecting cover 7 is fixedly connected or vertically connected with the trough body 1 in a sliding manner. In order to adjust the height of the lithium collecting cover 7 according to the height of the molten salt liquid level in the electrolytic cell, preferably, the lithium collecting cover 7 is vertically and slidably connected with the cell body 1, and a screw 10 for adjusting the height of the lithium collecting cover 7 is arranged between the lithium collecting cover 7 and the cell body 1.

Claims (6)

1. Metal lithium electrolytic bath slagging-off structure collects cover (5) including cell body (1), chlorine to and set up in cell body (1) separate net (4), positive pole (2) and negative pole (3), negative pole (3) encircle set up in positive pole (2) outside, chlorine is collected cover (5) and is set up the top at positive pole (2), separate net (4) and set up between positive pole (2) and negative pole (1), it collects cover (5) with chlorine to separate the upper end of net (4) and is connected its characterized in that: the lower end of the separation net (4) is provided with a plurality of air blowing holes (81) arranged around the separation net (4) at intervals on one side of the cathode (3), the air blowing holes (81) are arranged in a gap between the cathode (3) and the separation net (4), and the air blowing holes (81) are communicated with an air supply pipe (8) arranged outside the tank body (1).

2. The metal lithium electrolytic bath deslagging structure of claim 1, wherein: the air outlet direction of the air blowing holes (81) faces to the cathode (3).

3. The metal lithium electrolytic bath deslagging structure of claim 2, wherein: the included angle between the air outlet direction of the air blowing holes (81) and the cathode (3) is a, and a is more than or equal to 20 degrees and less than or equal to 45 degrees.

4. The metal lithium electrolytic bath deslagging structure of claim 1, 2, or 3, wherein: the improved oxygen-blowing device is characterized in that a plurality of adapter tubes (9) which correspond to the air blowing holes (81) one to one are arranged in the tank body (1), the air blowing holes (81) are formed at the tube openings of one ends of the adapter tubes (9), and the other ends of the adapter tubes (9) are bent from the lower side of the separation net (4) and then are communicated with the air feeding tube (8) from the gap between the separation net (4) and the anode (2).

5. A lithium metal electrolytic bath deslagging structure as recited in claim 1 wherein: the lithium collector is characterized in that a lithium collecting cover (7) connected with the trough body (1) is arranged above the cathode (3), and a lithium pumping pipe (6) with one end arranged in the inner cavity of the lithium collecting cover (7) is arranged on the lithium collecting cover (7).

6. A lithium metal electrolytic bath deslagging structure as recited in claim 5 wherein: the lithium collecting cover (7) is connected with the groove body (1) in a vertical sliding mode, and a screw rod (10) for adjusting the height of the lithium collecting cover (7) is arranged between the lithium collecting cover (7) and the groove body (1).

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