CN104032333B - A kind of closing down magnesium electrolysis bath of high current efficiency double collection magnesium room - Google Patents

Abstract

The present invention relates to the closing down magnesium electrolysis bath of a kind of high current efficiency double collection magnesium room, it is characterised in that closing down magnesium electrolysis bath comprises minus plate, positive plate and collection magnesium room, the number of collection magnesium room is two, is separately positioned on the both sides of minus plate and positive plate, and two collection magnesium rooms are symmetric.The present invention changes the structure of tradition closing down magnesium electrolysis bath, uses two symmetrical collection magnesium rooms, takes to insert or the method for lower slotting cathode and anode between two collection magnesium rooms.This structural change electrolyte flow situation of closing down magnesium electrolysis bath, takes full advantage of the flow behavior of electrolyte, improves the separation efficiency of magnesium metal.Compared with former grooved, the magnesium metal separation efficiency of the most double collection magnesium rooms electrolysis bath is greatly improved, and effect is obvious.

Description

A Magnesium Electrolyzer with High Current Efficiency and Dual Magnesium Collection Chambers

【Technical field】

The invention relates to the technical field of electrolytic cells, in particular to a magnesium electrolytic cell with high current efficiency and double magnesium collecting chambers.

【Background technique】

Magnesium is the lightest non-ferrous metal, which can form high-strength alloys with other metals well, and its continuous improvement of castability makes it more and more widely used, and it is a beneficial supplement to traditional aluminum alloys. In the United States, magnesium alloys have experienced explosive growth in the fields of consumer electronics, automobiles, and medical care, and are likely to replace traditional alloys such as aluminum alloys. Magnesium is not only expected as a lightweight material, but also as an electrode construction material for magnesium fuel cells, which has important applications in the battery industry.

China is a country with large magnesium resources and a large producer of magnesium metal, but the production method is mainly Pidgeon method. The domestic electrolysis production process equipment is backward, the cell type is small, the current efficiency and production efficiency are low, and the energy consumption is high. In contrast, foreign electrolysis equipment has high current intensity, high degree of automation, high output of metal magnesium per unit area, and low power consumption. The current efficiency of magnesium electrolyzers without separators currently in operation in my country is only about 76-78%, and the separation efficiency of metal magnesium is low. The entire magnesium electrolysis industry has a huge gap with foreign countries.

Based on the research on the advanced magnesium electrolysis process, an electrolytic cell with low energy consumption and high metal magnesium separation rate is designed. At the same time, develop the key technology of magnesium electrolysis with my country's independent intellectual property rights, and further organically combine with natural gas chemical industry to form a circular economy industrial chain in which various resources such as magnesium and natural gas chemical industry rely on each other and support each other, so as to maximize resource utilization and maximize economic benefits. optimize.

【Content of invention】

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a magnesium electrolytic cell with high current efficiency and double magnesium collecting chambers.

The purpose of the present invention is achieved through the following technical solutions:

A magnesium electrolytic cell with high current efficiency and double magnesium collecting chambers, the magnesium electrolytic cell includes a cathode plate, an anode plate and a magnesium collecting chamber, the number of the magnesium collecting chambers is two, respectively arranged on both sides of the cathode plate and the anode plate, and The two magnesium collecting chambers are distributed symmetrically.

The distance between the cathode plate and the anode plate is 0.03-0.08m.

The cathode plate is inserted into the magnesium electrolytic cell from the top or bottom of the electrolytic cell.

The anode plate is inserted into the magnesium electrolytic cell from the top or bottom of the electrolytic cell.

The cathode plate and the anode plate have the same width and height.

The range of the width of the cathode plate and the anode plate is 0.9～1.6m

The range of the height of the cathode plate and the anode plate is 2.0～3.0m

The thickness of the cathode plate is 0.05-0.15m.

The thickness of the anode plate is 0.15-0.25m.

Compared with prior art, positive effect of the present invention is:

The invention changes the structure of the traditional magnesium electrolytic cell, adopts two symmetrical magnesium collecting chambers, and adopts the method of inserting the cathode and the anode upwardly or downwardly between the two magnesium collecting chambers. The structure changes the flow condition of the electrolyte in the magnesium electrolyzer, makes full use of the flow characteristics of the electrolyte, and improves the separation efficiency of metal magnesium. Compared with the original cell type, the metal magnesium separation efficiency of the high-efficiency double magnesium collecting chamber electrolytic cell is greatly improved, and the effect is obvious.

【Description of drawings】

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a schematic diagram of the structure of the prototype magnesium electrolytic cell; a is the appearance diagram, b is a cross-sectional schematic diagram

Figure 2 is a schematic diagram of the high-efficiency dual-magnesium chamber electrolyzer; a is the appearance diagram, and b is a cross-sectional schematic diagram

Fig. 3 is a schematic diagram of the flow field distribution of the original tank type of magnesium electrolyzer;

Fig. 4 is a schematic diagram of the flow field distribution of the high-efficiency double magnesium collecting chamber electrolyzer;

Fig. 5 is the flow schematic diagram of the original tank type metal magnesium of magnesium electrolyzer;

Figure 6 is a schematic diagram of the flow of metal magnesium in an electrolytic cell with high-efficiency double-collecting magnesium chambers;

The labels in the accompanying drawings are: 1. Anode, 2. Cathode, 3. Electrolysis chamber, 4. Magnesium collection chamber

【detailed description】

The following provides a specific embodiment of a magnesium electrolytic cell with high current efficiency and double magnesium collecting chambers of the present invention.

Example 1

Please refer to accompanying drawing 2, the basic components of a high-efficiency double magnesium collection chamber electrolyzer structure are anode 1, cathode 2, electrolysis chamber 3 and two magnesium collection chambers 4. The distance between the cathode plate and the anode plate is 0.07m, the cathode and the anode are inserted into the magnesium electrolytic cell from the top of the electrolytic cell, the width and height of the cathode and the anode are the same, the width is 1m, the height is 2.2m, and the thickness of the cathode plate is 0.05 m, the thickness of the anode plate is 0.15m.

Through the analysis of electric field, thermal field, magnetic field and flow field, the thermal balance of the upward inserted cathode magnesium electrolytic cell is good,

The electrolyte temperature is 700°C, the electrolyte flow state is good, and the separation rate of metal magnesium is greatly improved. The calculated flow field distribution of the electrolytic cell is shown in Figure 4; the flow of metal magnesium is shown in Figure 6:

It can be seen from the figure that in the high-efficiency double magnesium collecting chamber electrolyzer, metal magnesium flows into the left and right symmetrical magnesium collecting chambers respectively with the electrolyte, and finally gathers at the electrolyte liquid level of the magnesium collecting chamber. Almost no metal magnesium exists in the electrolytic chamber, and the separation rate of metal magnesium is extremely high.

Comparative example 1

Please refer to accompanying drawing 1, the basic components of the prototype magnesium electrolyzer structure anode 1, cathode 2, electrolysis chamber 3 and magnesium collection chamber 4.

Compared with the original cell type, the high-efficiency double magnesium collecting chamber electrolytic cell has a good thermal balance, the electrolyte temperature is controlled at around 700°C, and the basic process parameters remain stable. At the same time, the one-time separation rate of magnesium metal increased from 17% to 96%, and the separation efficiency was greatly improved.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be considered Within the protection scope of the present invention.

Claims (5)

1. The magnesium electrolyzer of a kind of high current efficiency double magnesium collection chamber is characterized in that, magnesium electrolyzer comprises cathode plate, anode plate and magnesium collection chamber, and the number of magnesium collection chamber is two, is respectively arranged on cathode plate and anode Both sides of the plate, and the two magnesium collection chambers are symmetrically distributed; The cathode plate is inserted into the magnesium electrolytic cell from the top or bottom of the electrolytic cell; The anode plate is inserted into the magnesium electrolytic cell from the top or bottom of the electrolytic cell; The width and height of the cathode plate and the anode plate are the same; The height range of the cathode plate and the anode plate is 2.0-3.0m. 2 . The magnesium electrolytic cell with high current efficiency and double magnesium collection chambers according to claim 1 , wherein the distance between the cathode plate and the anode plate is 0.03-0.08 m. 3 . The magnesium electrolytic cell with high current efficiency and double magnesium collection chambers as claimed in claim 1 , wherein the width of the cathode plate and the anode plate is 0.9-1.6 m. 4 . 4 . The magnesium electrolytic cell with high current efficiency and double magnesium collection chambers according to claim 1 , wherein the thickness of the cathode plate is 0.05-0.15 m. 5 . The magnesium electrolytic cell with high current efficiency and double magnesium collection chambers according to claim 1 , wherein the thickness of the anode plate is 0.15-0.25 m.