Online separation device for electrolytes and carbon residues in electrolytic cell

Abstract

The utility model relates to the technical field of carbon residue separation, in particular to an electrolytic bath electrolyte and carbon residue online separation device which comprises a transfer frame and a carbon residue deposition tank arranged on the transfer frame in a turnover mode. A liquid electrolyte deposition hopper is arranged on the transfer frame and is positioned below the carbon residue deposition tank; the carbon residue deposition tank comprises a plurality of electrolyte guide plates; and a plurality of electrolyte guide holes are formed in the electrolyte guide plate. The quality of carbon residue fishing operation is improved, and the labor intensity of workers is reduced; production power consumption of the electrolytic cell is reduced, and cost pressure is reduced; the electrolyte content in the carbon residues can be reduced, and powerful recovery of the hazardous waste carbon residues is improved; the damage rate of the electrolytic cell is reduced and the service life of the electrolytic cell is prolonged.

Description

An online separation device for electrolyte and carbon slag in an electrolytic cell Technical Field

[0001] This utility model relates to the field of carbon slag separation technology, and in particular to an online separation device for electrolyte and carbon slag in an electrolytic cell. Background Technology

[0002] Conventional aluminum electrolysis is an important industrial process used to produce high-purity aluminum metal. Current aluminum electrolysis production primarily uses carbon anodes, which are produced from raw materials such as petroleum coke and pitch. Petroleum coke contains a certain amount of coal dust and impurities. These impurities include various trace elements such as sodium, phosphorus, and sulfur, which can affect anode performance, weakening its oxidation resistance. If petroleum coke with high impurity content is used to produce anodes, carbon slag will be generated during the aluminum electrolysis process.

[0003] Producing one ton of primary aluminum generates 5-10 kg of carbon slag. This carbon slag increases the resistance and decreases the conductivity of the electrolyte, leading to a higher electrolyte voltage drop and increased energy consumption in aluminum electrolysis. Furthermore, when it accumulates to a certain level, it increases heat gain in the electrolytic cell, causing electrolyte overheating, a rise in cell temperature, and the formation of a hot cell. When a large amount of carbon slag floats on the surface of the aluminum electrolytic solution, it forms a current path between the anode and cathode. Some current will directly pass through the carbon slag into the cathode or side, unable to participate in the electrolytic reaction. This can severely lead to side leakage, negatively impacting production efficiency and product quality. Therefore, manual removal methods are necessary to reduce its content in the liquid electrolyte. However, during removal, carbon slag and a small amount of electrolyte are also removed. Since electrolytes are reusable, they must be removed from the carbon slag. Once the electrolyte has solidified, it is easier to screen and separate. Summary of the Invention

[0004] The purpose of this invention is to provide an online separation device for electrolyte and carbon slag in an electrolytic cell, which solves the problem of how to assist manual separation of dredged carbon slag and electrolyte.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This utility model provides an online separation device for electrolyte and carbon slag in an electrolytic cell, including a transfer frame and a carbon slag deposition tank that can be flipped on the transfer frame; a liquid electrolyte deposition hopper is provided on the transfer frame and below the carbon slag deposition tank; the carbon slag deposition tank includes multiple electrolyte guide plates; and multiple electrolyte guide holes are provided on the electrolyte guide plates.

[0007] Furthermore, in this embodiment, the bottom of the transfer frame is provided with at least one movable wheel, the bottom end of the transfer frame is provided with a balancing support leg, and the transfer frame is also provided with a movable handrail; the above design enables the transfer frame to have the ability to be pushed and moved.

[0008] Furthermore in this embodiment, the end of the carbon slag deposition tank is mounted on the transfer frame via a movable hinge or hinged seat; wherein the carbon slag deposition tank is designed as a split hinged structure to facilitate the filtration and cleaning of carbon slag.

[0009] Furthermore in this embodiment, multiple electrolyte guide plates are arranged in a corrugated or folded shape at the bottom of the carbon slag deposition tank.

[0010] In this embodiment, the electrolyte guide hole is a long hole structure that extends through the wall thickness of the electrolyte guide plate; liquid metal flows into the liquid electrolyte deposition tank through the electrolyte guide hole, and the carbon slag is trapped on the electrolyte guide plate.

[0011] Furthermore in this embodiment, an auxiliary tilting handle is also provided on the carbon slag deposition tank; wherein the movable handle serves as a limiting block for limiting the carbon slag deposition tank above the carbon slag deposition tank, and also serves as a handle to drive the carbon slag deposition tank to deflect, thereby realizing the dumping of carbon slag.

[0012] Furthermore, in this embodiment, an electrolyte guide hole is provided on the top of the electrolyte guide plate for filtering carbon residue.

[0013] Furthermore, in this embodiment, one side wall of the liquid electrolyte deposition tank is designed to be inclined.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] (1) Improve the quality of carbon slag dredging operations and reduce the labor intensity of personnel;

[0016] (2) Reduce the power consumption of the electrolytic cell and alleviate cost pressure;

[0017] (3) Reduce the electrolyte content in carbon slag to improve the effective recovery of hazardous carbon slag;

[0018] (4) Reduce the breakage rate of electrolytic cells and extend their service life. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a schematic diagram of the structure of the online separation device for electrolyte and carbon slag in the electrolytic cell of this utility model;

[0021] Figure 2 is a schematic diagram of the electrolyte guide hole in the online separation device for electrolyte and carbon slag in the electrolytic cell of this utility model.

[0022] Figure 3 is a schematic diagram of the electrolyte guide plate of the online separation device for electrolyte and carbon slag in the electrolytic cell of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. Carbon slag sedimentation tank; 2. Movable hinge; 3. Electrolyte guide plate; 4. Liquid electrolyte sedimentation hopper; 5. Movable wheel; 6. Balance support leg; 7. Movable handrail; 8. Movable handrail; 9. Electrolyte guide hole. Detailed Implementation

[0024] Referring to Figure 1, this embodiment discloses an online separation device for electrolyte and carbon slag in an electrolytic cell, including a transfer frame and a carbon slag deposition tank 1 that is rotatably installed on the transfer frame; a liquid electrolyte deposition hopper 4 is installed on the transfer frame and below the carbon slag deposition tank 1; the carbon slag deposition tank 1 includes multiple electrolyte guide plates 3; multiple electrolyte guide holes 9 are installed on the electrolyte guide plates 3; in a specific implementation, electrolyte guide holes 9 can also be provided on the top of the electrolyte guide plates 3 for filtering carbon slag, and liquid aluminum liquid can fall through the electrolyte guide holes 9.

[0025] The bottom of the transfer frame is equipped with two movable wheels 5 via bearings and a rotating shaft, a balancing support leg 6 is installed at the bottom end of the transfer frame, and a movable handrail 7 is also installed on the transfer frame.

[0026] During operation, the operator pushes the online electrolyte and carbon slag separation device to the aluminum outlet end of the target tank where carbon slag needs to be removed, adjusts the position to suit their personal operating habits, opens the furnace door, and uses a slotted shovel to scoop out the carbon slag and liquid electrolyte from the aluminum outlet, pouring it onto the top of the electrolyte guide plate 3. Separation occurs through the electrolyte guide holes 9 on the guide plate 3. The liquid electrolyte then flows into the liquid electrolyte sedimentation hopper 4 below, where it solidifies as the temperature decreases. The carbon slag remains on the sedimentation tank 1 of the guide plate 3. Due to the solid particles of carbon on the sedimentation tank 1 of the guide plate 3... The slag and liquid electrolyte mixture is at a high temperature, and the liquid electrolyte can separate on its own, achieving the separation effect. After the slag in this tank is dredged, it is pushed to the next target tank for slag dredging. After the slag covers the slag deposition tank, the online separation device of electrolyte and slag is pushed to the slag fixed storage area. The deposition tank 1 of the slag guide plate 3 is lifted by the movable handle 8 and poured into the storage area. Then the electrolyte in the electrolyte deposition chamber is returned to the furnace, achieving the effect of slag recovery and electrolyte return. The problem and effect solved by the further optimized solution in the technical solution adopted in this invention.

[0027] In one embodiment, the end of the carbon slag deposition tank 1 is mounted on the transfer frame via a movable hinge 2 or a hinged seat. Referring to Figure 1, it is specifically hinged to the left end inside the liquid electrolyte deposition hopper 4 to facilitate the dumping of carbon slag.

[0028] Referring to Figure 3, multiple electrolyte guide plates 3 are installed in a corrugated or folded shape at the bottom of the carbon slag deposition tank 1. The inclined design of the electrolyte guide plates 3 can reduce the splashing of molten aluminum.

[0029] In this embodiment, the electrolyte guide hole 9 is an elongated hole structure that extends through the wall thickness of the electrolyte guide plate 3, so as to facilitate the flow of molten aluminum.

[0030] In this embodiment, an auxiliary tilting handle 8 is also installed on the carbon slag deposition tank 1; on the one hand, the movable handle 8 is used as a limiting block to limit the carbon slag deposition tank above the carbon slag deposition tank, and on the other hand, it can also drive the carbon slag deposition tank 1 to tilt and deflect, so as to pour out the carbon slag.

[0031] In this embodiment, the liquid electrolyte deposition tank 4 is made of 6mm steel plate welded together. The front side plate of the base is designed with a 40-degree angle. The main purpose is to make it flush with the ground when cleaning the carbon slag deposition tank 1. The tilt angle ensures that the electrolyte guide plate 3 is isolated from the solid electrolyte during the pouring process, so as to prevent the carbon slag from mixing with the electrolyte.

[0032] In another implementation, the electrolyte guide plate is made by bending a 5mm stainless steel plate, and electrolyte guide holes 9 are cut into the stainless steel plate. There are two main considerations for this:

[0033] 1. After the liquid electrolyte and carbon slag are retrieved together, they are separated using the electrolyte guide hole 9. The liquid electrolyte flows into the liquid electrolyte sedimentation tank 4 through the electrolyte guide hole 9 and gradually cools down to become solid electrolyte, while the carbon slag remains as a solid on the electrolyte guide plate 3.

[0034] 2. The stainless steel plate material is not easily adhered to carbon slag and electrolyte, and can be separated smoothly.

[0035] In this embodiment, the movable hinge 2 is welded to one end of the electrolyte guide plate 3 in the form of a door hinge, serving as the central axis for tilting the electrolyte guide plate 3. Simply lift the movable handle 8, and the solid carbon slag will be poured into the carbon slag recycling box for the next stage of carbon slag recycling. The welding position of the movable hinge matches the tilting angle of the electrolyte guide plate 3, reducing the spillage of solid carbon slag and facilitating the storage and management of hazardous waste materials.

[0036] In this embodiment, the carbon slag deposition tank 1 utilizes the granular storage and accumulation of carbon slag, with gaps between them. Liquid electrolyte drips into the liquid electrolyte deposition hopper 4 through the height difference of the electrolyte guide plate 3. As the retrieval time progresses, the temperature decreases, and the liquid electrolyte will become a solid electrolyte, which facilitates the recovery of the electrolyte.

[0037] In this embodiment, the movable wheels are made of solid tires with a diameter of 700mm. The purpose is to match the height of the electrolytic cell slab, making it convenient for operators to reach the slag during retrieval. They are also designed to facilitate the movement of the online separation device for electrolyte and carbon slag, thereby improving the work efficiency of carbon slag retrieval operators.

[0038] In this embodiment, the balance support leg 6 is made of DN32 steel pipe by welding, which is intended to stably park the online separation device of electrolyte and carbon slag without the need for manual assistance.

[0039] In this embodiment, the movable handrail 7 is made of DN25 steel pipe welded together. Its purpose is to control the movement and direction of the online separation device of electrolyte and carbon slag.

[0040] In this embodiment, the movable handrail 8 is made of DN25 stainless steel pipe welded to the electrolyte guide plate 3. The purpose is to use the movable handrail 8 to flip and reset the carbon slag deposition tank 1 and the electrolyte guide plate 3 as a whole.

[0041] In this embodiment, the electrolyte guide holes 9 are cut by plasma cutting, with a spacing of 40 mm, a length of 200 mm, and a width of 10 mm, and arranged together. The purpose is to utilize the fluidity of the high-temperature liquid electrolyte to enter the liquid electrolyte deposition tank 4 through the electrolyte guide holes 9.

[0042] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An online separation device for electrolyte and carbon slag in an electrolytic cell, characterized in that: The device includes a transfer frame and a carbon slag deposition tank that can be flipped on the transfer frame; a liquid electrolyte deposition hopper is provided on the transfer frame and below the carbon slag deposition tank; the carbon slag deposition tank includes multiple electrolyte guide plates; and multiple electrolyte guide holes are provided on the electrolyte guide plates.

2. The online separation device for electrolyte and carbon slag in an electrolytic cell according to claim 1, characterized in that: The transfer frame is provided with at least one movable wheel at its bottom, a balancing support leg at the bottom of the end side of the transfer frame, and a movable handrail on the transfer frame.

3. The online separation device for electrolyte and carbon slag in an electrolytic cell according to claim 2, characterized in that: The end of the carbon slag deposition tank is mounted on the transfer frame via a movable hinge or hinged seat.

4. The online separation device for electrolyte and carbon slag in an electrolytic cell according to claim 3, characterized in that: Multiple electrolyte guide plates are arranged in a corrugated or folded shape at the bottom of the carbon slag deposition tank.

5. The online separation device for electrolyte and carbon slag in an electrolytic cell according to claim 4, characterized in that: The electrolyte flow guide hole is an elongated hole structure that extends through the wall thickness of the electrolyte flow guide plate.

6. The online separation device for electrolyte and carbon slag in an electrolytic cell according to claim 5, characterized in that: The carbon slag deposition tank is also equipped with a movable handrail to assist in tilting.

7. The online separation device for electrolyte and carbon slag in an electrolytic cell according to claim 1, characterized in that: An electrolyte flow guide hole is provided at the top of the electrolyte flow guide plate.

8. The online separation device for electrolyte and carbon slag in an electrolytic cell according to claim 1, characterized in that: One side wall of the liquid electrolyte deposition tank is designed to be inclined.

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