CN111926346A

CN111926346A - High-purity cobalt purification device

Info

Publication number: CN111926346A
Application number: CN202010810054.XA
Authority: CN
Inventors: 唐坤; 王广欣; 赵云超; 杨斌; 逯峙; 李海涛; 刘海洋; 胡忠军; 高志廷
Original assignee: Henan University of Science and Technology
Current assignee: Henan University of Science and Technology
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2020-11-13

Abstract

The invention relates to a high-purity cobalt purification device. The technical scheme is that the device comprises an electrolytic bath body, an anode wiring board, a cathode wiring board, an anion exchange membrane, an anode basket, a cathode board, a liquid outlet pipe, a liquid inlet pipe, a water pump, an ion exchange column and an electric cabinet. According to the invention, the preparation of high-purity cobalt is carried out by an electrolytic method, the anion exchange membrane is arranged between the cathode plate and the anode basket, cations in the anode region are prevented from directly entering the vicinity of the cathode plate, and the electrolyte in the anode region is pumped by the water pump to pass through the ion exchange column for adsorption and filtration and then enters the cathode region, so that impurity ions can be adsorbed in the ion exchange column and cobalt ions are reserved in the electrolyte pumped to the cathode region, thus the electrolyte is purified by means of the obstruction of the anion exchange membrane and the adsorption of the ion exchange column, the purity of the cobalt ions in the electrolyte in the cathode region is ensured, and the purity of the cobalt elementary substance produced by electrolysis on the cathode plate is higher.

Description

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

The high-purity cobalt has excellent semiconductor property, magnetic property and electric conductivity, and is an important material for preparing components such as magnetic recording media, magnetic recording heads, photoelectric devices, magnetic sensors, integrated circuits and the like. The high-purity cobalt with the purity of 5N or more is mainly used for manufacturing the sputtering target material for the super-large-scale integrated circuit industry. At present, the technology is limited to the technical reason, and the high-purity cobalt of 5N and above needs to be imported in a large quantity, so that the development of the preparation technology of the high-purity cobalt with independent intellectual property rights is particularly important. The method for preparing high-purity cobalt by purifying the CoSO4 aqueous solution through ion exchange has the common problem that the main impurity element Fe in the cobalt salt solution is difficult to remove, and the purity of the prepared cobalt can be greatly improved by solving the problem.

Disclosure of Invention

In view of the problems in the prior art, the invention discloses a high-purity cobalt purification device which adopts the technical scheme that the device comprises an electrolytic cell body, wherein two anion exchange membranes are fixedly connected on a bottom plate of an inner cavity of the electrolytic cell body, the inner cavity of the motor cell body is divided into two anode tanks positioned at two ends and a cathode tank positioned in the middle by the two anion exchange membranes, a liquid outlet is formed in the corresponding side wall of each anode tank, a liquid inlet is formed in the corresponding side wall of each cathode tank, anode wiring boards are fixedly connected to the edges of two ends of an opening in the upper part of the electrolytic cell body, an anode basket is fixedly connected onto each anode wiring board through a conductive metal plate, the whole anode basket is positioned in each anode tank, a cathode wiring board is fixedly connected to the middle position of the opening in the upper part of the electrolytic cell body, and a cathode plate is fixedly, the negative plate is wholly located in the cathode trough and the lower end of the negative plate is not contacted with the bottom of the inner cavity of the electrolytic cell body, the outer side of the side wall of the electrolytic cell body is fixedly connected with a liquid outlet and a liquid inlet corresponding position respectively, the liquid outlet is communicated and connected with the liquid inlet through a pipeline after being sequentially connected with a water pump and an ion exchange column, and the anode wiring board, the cathode wiring board and the water pump are respectively electrically connected with the electric cabinet through wires.

As a preferable aspect of the present invention, the anode terminal plate and the cathode terminal plate are insulated from the electrolytic bath body.

As a preferable scheme of the invention, the anode basket is of a mesh basket structure made of titanium materials, and the cathode plate is made of titanium materials.

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

The invention has the beneficial effects that: according to the invention, the preparation of high-purity cobalt is carried out by an electrolytic method, the anion exchange membrane is arranged between the cathode plate and the anode basket, so that anions near the cathode plate can directly move to the vicinity of the anode basket through the anion exchange membrane, the anion exchange membrane prevents cations in the anode region from directly entering the vicinity of the cathode plate, the electrolyte in the anode region is pumped by the water pump, adsorbed and filtered by the ion exchange column and then enters the cathode region, impurity ions can be adsorbed in the ion exchange column, and cobalt ions are reserved in the electrolyte pumped to the cathode region, so that the purity of the cobalt ions in the electrolyte in the cathode region is ensured by means of the obstruction of the anion exchange membrane and the adsorption and purification of the ion exchange column, and the purity of the cobalt elementary substance produced by electrolysis on the cathode plate is higher.

Drawings

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

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

In the figure: 1-electrolytic bath body, 101-anode bath, 102-cathode bath, 103-liquid outlet, 104-liquid inlet, 2-anode wiring board, 3-cathode wiring board, 4-anion exchange membrane, 5-anode basket, 6-cathode board, 7-liquid outlet pipe, 8-liquid inlet pipe, 9-water pump, 10-ion exchange column and 11-electric cabinet.

Detailed Description

Example 1

As shown in fig. 1 and 2, the high-purity cobalt purification device adopts the technical scheme that the device comprises an electrolytic cell body 1, two anion exchange membranes 4 are fixedly connected to a bottom plate of an inner cavity of the electrolytic cell body 1, the inner cavity of the motor cell body 1 is divided into two anode cells 101 positioned at two ends and a cathode cell 102 positioned in the middle by the two anion exchange membranes 4, a liquid outlet 103 is formed in a side wall corresponding to the anode cell 101, a liquid inlet 104 is formed in a side wall corresponding to the cathode cell 102, anode wiring boards 2 are fixedly connected to edges of two ends of an upper opening of the electrolytic cell body 1, an anode basket 5 is fixedly connected to the anode wiring board 2 through a conductive metal plate, the anode basket 5 is integrally positioned in the anode cell 101, a cathode wiring board 3 is fixedly connected to a middle position of the upper opening of the electrolytic cell body 1, and a cathode plate 6 is fixedly connected to the lower part of the cathode wiring board 3 through, the cathode plate 6 is integrally positioned in the cathode groove 102, the lower end of the cathode plate is not in contact with the bottom of the inner cavity of the electrolytic cell body 1, the outer side of the side wall of the electrolytic cell body 1 is fixedly connected with a liquid outlet pipe 7 and a liquid inlet pipe 8 respectively at the corresponding positions of the liquid outlet 103 and the liquid inlet 104, the liquid outlet pipe 7 is communicated and connected with the liquid inlet pipe 8 after being sequentially connected with a water pump 9 and an ion exchange column 10 through pipelines, and the anode wiring board 2, the cathode wiring board 3 and the water pump 9 are respectively electrically connected with the electric cabinet 11 through wires.

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

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

The cathode plate 6 is spaced from both of the anion exchange membranes 4 by the same distance.

The working principle of the invention is as follows: the invention prepares high-purity cobalt by an electrolytic method, the electrolyte is injected into an anode groove 101 of an electrolytic tank body 1, a cobalt sheet to be electrolyzed and purified is placed into an anode basket 5, after electrification, the cobalt sheet and other impurity metals lose electrons and become free metal ions to enter the electrolyte, meanwhile, a water pump 9 extracts the electrolyte from the anode groove 101 and enters a cathode groove 102 after the adsorption and filtration of an ion exchange column 10, resin in the ion exchange column 10 adsorbs the impurity metal ions, so that the purity of the cobalt ions in the electrolyte entering the cathode groove 102 is improved, an anion exchange membrane 4 is arranged between a cathode plate 6 and the anode basket 5, so that the anions in the cathode groove 102 can directly move into the anode groove 101 through the anion exchange membrane 4, and the anions in the anode groove 101 are prevented by the anion exchange membrane 4 from directly entering the cathode groove 102, thereby the electrolyte is purified by the obstruction of the anion exchange membrane 4 and the adsorption of the ion exchange column 10, only cobalt ions are ensured to obtain electrons on the cathode plate 6 to precipitate high-purity cobalt simple substance. After the electrolysis is finished, desorption liquid can be added into the electrolytic bath body 1 to desorb the ion exchange column 10 through the pumping of the water pump 9, and then the ion exchange column 10 can be regenerated for next use.

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

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes and modifications without inventive changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. The high-purity cobalt purification device is characterized by comprising an electrolytic bath body (1), wherein two anion exchange membranes (4) are fixedly connected to an inner cavity bottom plate of the electrolytic bath body (1), the two anion exchange membranes (4) divide an inner cavity of the motor bath body (1) into two anode tanks (101) positioned at two ends and a cathode tank (102) positioned in the middle, liquid outlets (103) are formed in corresponding side walls of the anode tanks (101), liquid inlets (104) are formed in corresponding side walls of the cathode tanks (102), anode wiring boards (2) are fixedly connected to edges of two ends of an upper opening of the electrolytic bath body (1), an anode basket (5) is fixedly connected to the anode wiring board (2) through a conductive metal plate, the anode basket (5) is integrally positioned in the anode tank (101), and a cathode wiring board (3) is fixedly connected to the middle position of the upper opening of the electrolytic bath body (1), cathode wiring board (3) lower part is through electrically conductive metal sheet fixedly connected with negative plate (6), negative plate (6) wholly are located in negative pole groove (102) and its lower extreme do not with the inner chamber bottom contact of electrolysis cell body (1), electrolysis cell body (1) lateral wall outside with liquid outlet (103) reach inlet (104) correspond the position respectively fixedly connected with drain pipe (7) and feed liquor pipe (8), behind water pump (9) and ion exchange post (10) are connected gradually through the pipeline drain pipe (7) with feed liquor pipe (8) intercommunication is connected, positive pole wiring board (2) cathode wiring board (3) reach between water pump (9) respectively and electric cabinet (11) through wire electric connection.

2. The apparatus for purifying high-purity cobalt as claimed in claim 1, wherein: and the anode wiring board (2) and the cathode wiring board (3) are respectively insulated from the electrolytic bath body (1).

3. The apparatus for purifying high-purity cobalt as claimed in claim 1, wherein: the anode basket (5) is of a mesh basket structure made of titanium materials.

4. The apparatus for purifying high-purity cobalt as claimed in claim 1, wherein: the cathode plate (6) is made of titanium.

5. The apparatus for purifying high-purity cobalt as claimed in claim 1, wherein: the distance between the cathode plate (6) and the two anion exchange membranes (4) is the same.