CN111926346A - High-purity cobalt purification device - Google Patents

Abstract

The invention relates to a high-purity cobalt purification device. The technical scheme adopted is, including electrolytic cell body, anode terminal board, cathode terminal board, anion exchange membrane, anode basket, cathode plate, liquid outlet pipe, liquid inlet pipe, water pump, ion exchange column, and electric control box. In the present invention, high-purity cobalt is prepared by electrolysis, and an anion exchange membrane is arranged between the cathode plate and the anode basket, which blocks the cations in the anode area from directly entering the vicinity of the cathode plate, and pumps the electrolyte in the anode area through a water pump. It is sent to the cathode area after being adsorbed and filtered by the ion exchange column. Impurity ions can be adsorbed in the ion exchange column, and the cobalt ions are retained in the electrolyte pumped to the cathode area, so that the barrier of the anion exchange membrane and the ion exchange column are used. Adsorbing and purifying the electrolyte ensures the purity of cobalt ions in the electrolyte in the cathode area, so that the cobalt element produced by electrolysis on the cathode plate is of higher purity.

Description

A kind of high-purity cobalt purification device

technical field

The invention belongs to the technical field of metal purification, and relates to a high-purity cobalt purification device.

Background technique

High-purity cobalt has excellent semiconductor properties, magnetic properties and electrical conductivity, and is an important material for the preparation of magnetic recording media, magnetic recording heads, optoelectronic devices, magnetic sensors and integrated circuits. High-purity cobalt with a purity of 5N and above is mainly used to manufacture sputtering targets for the VLSI industry. At present, due to technical reasons, high-purity cobalt of 5N and above needs to be imported in large quantities, so it is particularly important to develop high-purity cobalt preparation technology with independent intellectual property rights. The method for preparing high-purity cobalt by purifying CoSO4 aqueous solution by ion exchange has a common problem that the main impurity element Fe in the cobalt salt solution is difficult to remove. Solving this problem will greatly improve the purity of the prepared cobalt.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the present invention discloses a high-purity cobalt purification device. The technical solution adopted is that it includes an electrolytic cell body, and two anion exchange membranes are fixedly connected to the bottom plate of the cavity of the electrolytic cell body. The two anion exchange membranes divide the inner cavity of the motor tank into two anode tanks at both ends and a cathode tank in the middle. A liquid outlet is provided on the side wall corresponding to the anode tank, and the cathode is The side wall corresponding to the tank is provided with a liquid inlet, and the edges of the two ends of the upper opening of the electrolytic cell body are fixedly connected with an anode wiring board, and an anode basket is fixedly connected to the anode wiring board through a conductive metal plate, and the anode basket is integrally Located in the anode tank, a cathode terminal plate is fixedly connected at the middle position of the upper opening of the electrolytic tank body, and a cathode plate is fixedly connected to the lower part of the cathode terminal plate through a conductive metal plate, and the cathode plate is integrally located in the cathode tank. In the middle and its lower end is not in contact with the bottom of the inner cavity of the electrolytic cell body, the outside of the side wall of the electrolytic cell body and the corresponding positions of the liquid outlet and the liquid inlet are respectively fixedly connected with a liquid outlet pipe and a liquid inlet pipe. The liquid outlet pipe is sequentially connected to the water pump and the ion exchange column through pipelines and then communicated with the liquid inlet pipe, and the anode terminal board, the cathode terminal board and the water pump are respectively connected with the electric control box through wires. Electrical connection.

As a preferred solution of the present invention, insulation treatment is performed between the anode terminal board and the cathode terminal board and the electrolytic cell body respectively.

As a preferred solution of the present invention, the anode basket is a mesh basket structure made of titanium material, and the cathode plate is made of titanium material.

As a preferred solution of the present invention, the distance between the cathode plate and the two anion exchange membranes is the same.

Beneficial effects of the present invention: the present invention prepares high-purity cobalt by an electrolysis method, and an anion exchange membrane is arranged between the cathode plate and the anode basket, so that the anions near the cathode plate can directly move to the vicinity of the anode basket through the anion exchange membrane, The anion exchange membrane blocks the cations in the anode area from directly entering the vicinity of the cathode plate. Instead, the electrolyte in the anode area is pumped by the water pump through the ion exchange column for adsorption and filtration before entering the cathode area. In the ion exchange column, impurity ions can be removed. Adsorption, the cobalt ions are retained in the electrolyte pumped to the cathode area, so that the electrolyte is purified by the barrier of the anion exchange membrane and the adsorption of the ion exchange column to ensure the purity of the cobalt ions in the electrolyte in the cathode area. The pure cobalt produced by electrolysis is higher.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

FIG. 2 is a cross-sectional view of the internal structure of the electrolytic cell of the present invention.

In the figure: 1- Electrolytic cell body, 101- Anode cell, 102- Cathode cell, 103- Liquid outlet, 104- Liquid inlet, 2- Anode terminal board, 3- Cathode terminal board, 4- Anion exchange membrane, 5 -Anode basket, 6-cathode plate, 7-liquid outlet pipe, 8-liquid inlet pipe, 9-water pump, 10-ion exchange column, 11-electric control box.

Detailed ways

Example 1

As shown in Figures 1 and 2, a high-purity cobalt purification device according to the present invention adopts a technical solution that includes an electrolytic cell body 1, and two anions are fixedly connected to the inner cavity bottom plate of the electrolytic cell body 1 Exchange membrane 4, the two anion exchange membranes 4 divide the inner cavity of the motor tank body 1 into two anode tanks 101 located at both ends and a cathode tank 102 located in the middle, and the side walls corresponding to the anode tanks 101 are A liquid outlet 103 is provided, a liquid inlet 104 is provided on the side wall corresponding to the cathode tank 102, an anode wiring board 2 is fixedly connected to the edges of both ends of the upper opening of the electrolytic cell body 1, and the anode wiring board 2 is An anode basket 5 is fixedly connected through a conductive metal plate, the anode basket 5 is integrally located in the anode cell 101 , and a cathode wiring board 3 is fixedly connected at the middle position of the upper opening of the electrolytic cell body 1 , and the cathode wiring board 3 The lower part is fixedly connected with a cathode plate 6 through a conductive metal plate. The cathode plate 6 is integrally located in the cathode tank 102 and its lower end is not in contact with the bottom of the inner cavity of the electrolytic cell body 1. The side wall of the electrolytic cell body 1 A liquid outlet pipe 7 and a liquid inlet pipe 8 are respectively fixedly connected to the positions corresponding to the liquid outlet 103 and the liquid inlet 104 on the outside. Connected with the liquid inlet pipe 8 , the anode wiring board 2 , the cathode wiring board 3 and the water pump 9 are respectively electrically connected with the electric control box 11 through wires.

The anode wiring board 2 and the cathode wiring board 3 are insulated from the electrolytic cell body 1 respectively.

The anode basket 5 is a mesh basket structure made of titanium material, and the cathode plate 6 is made of titanium material.

The distance between the cathode plate 6 and the two anion exchange membranes 4 is the same.

The working principle of the present invention: the present invention prepares high-purity cobalt by electrolysis, injects the electrolyte into the anode cell 101 of the electrolytic cell body 1, puts the cobalt sheet to be electrolytically purified into the anode basket 5, and after electrification , the cobalt sheet and other impurity metals lose electrons and become free metal ions into the electrolyte, while the water pump 9 extracts the electrolyte from the anode tank 101 and enters the cathode tank 102 after being adsorbed and filtered by the ion exchange column 10, The resin in the ion exchange column 10 adsorbs the impurity metal ions, so that the purity of cobalt ions in the electrolyte entering the cathode tank 102 is improved. The anions can directly move into the anode tank 101 through the anion exchange membrane 4, and the anion exchange membrane 4 blocks the cations in the anode tank 101 from directly entering the cathode tank 102, so as to use the barrier of the anion exchange membrane 4 and the ion exchange column 10. The adsorption and purification of the electrolyte ensures that only cobalt ions get electrons on the cathode plate 6 and are precipitated to form high-purity cobalt elements. After the electrolysis is completed, the desorption liquid can be added to the electrolytic cell body 1 to desorb the ion exchange column 10 through the pumping of the water pump 9, so that the ion exchange column 10 can be regenerated for the next use.

Components and circuit connections not described in detail herein are prior art.

Although the specific embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the art, various Such changes, modifications or deformations without creative work are still within the protection scope of the present invention.

Claims (5)

1. A high-purity cobalt purification device, characterized in that it comprises an electrolytic cell body (1), and two anion exchange membranes (4) are fixedly connected on the inner cavity bottom plate of the electrolytic cell body (1), and two described The anion exchange membrane (4) divides the inner cavity of the motor tank body (1) into two anode tanks (101) located at both ends and a cathode tank (102) located in the middle, and the side corresponding to the anode tank (101) A liquid outlet (103) is provided on the wall, a liquid inlet (104) is provided on the side wall corresponding to the cathode tank (102), and the edges of both ends of the upper opening of the electrolytic cell body (1) are fixedly connected with anode wiring A plate (2), an anode basket (5) is fixedly connected to the anode wiring plate (2) through a conductive metal plate, the anode basket (5) is integrally located in the anode cell (101), and the electrolytic cell body (1) A cathode terminal plate (3) is fixedly connected at the middle position of the upper opening, and a cathode plate (6) is fixedly connected to the lower part of the cathode terminal plate (3) through a conductive metal plate, and the cathode plate (6) is integrally located at the In the cathode tank (102) and its lower end is not in contact with the bottom of the inner cavity of the electrolytic cell body (1), the outside of the side wall of the electrolytic cell body (1) is in contact with the liquid outlet (103) and the inlet. The corresponding positions of the liquid port (104) are respectively fixedly connected with a liquid outlet pipe (7) and a liquid inlet pipe (8), and the liquid outlet pipe (7) is sequentially connected to the water pump (9) and the ion exchange column (10) through pipeline Connected with the liquid inlet pipe (8), the anode wiring board (2), the cathode wiring board (3) and the water pump (9) are electrically connected to the electric control box (11) through wires respectively. connect. 2. A high-purity cobalt purification device according to claim 1, characterized in that: between the anode terminal plate (2) and the cathode terminal plate (3) respectively and the electrolytic cell body (1) Insulate. 3 . The high-purity cobalt purification device according to claim 1 , wherein the anode basket ( 5 ) is a mesh basket structure made of titanium material. 4 . 4. A high-purity cobalt purification device according to claim 1, wherein the cathode plate (6) is made of titanium. 5 . The high-purity cobalt purification device according to claim 1 , wherein the distance between the cathode plate ( 6 ) and the two anion exchange membranes ( 4 ) is the same. 6 .

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