KR19990025589U - Electrolyzer for Extracting Nonmetallic Inclusions in Steel - Google Patents

Abstract

The present invention relates to an electrolytic cell which is an essential device for extracting non-metallic inclusions contained in steel by electrolysis, and more particularly, in an electrolytic cell used for electrolytic extraction of steel inclusions, the electrolytic cell is installed in the center of the electrolytic cell 20. The electrolyte supply part 21 located between two liquid feed part resistance plates 31 and 31-1, and has a lower height than the liquid feed part resistance plates 31 and 31-1, and has an electrolyte supply hole 14 at a lower end thereof. Is formed, and the electrolyte discharge part 22 and the electrolyte supply part 21 and the electrolyte discharge part 22 which are located outside the drainage part resistance plates 32 and 32-1 which are provided at both ends of the electrolytic cell 20, respectively. It is located between), the electrolytic action occurs, and relates to an electrolytic cell for extracting non-metallic inclusions in the steel, characterized in that it consists of an electrolytic extraction unit 23 provided with an inert gas supply pipe (13).

According to the present invention as described above, the agitation of the electrolyte solution is induced by the flow of the dropping of the electrolyte by the liquid supply part resistance plate and the drainage part resistance plate installed in the electrolytic cell and the flow of the gas blowing by the inert gas supply pipe, Uniform electrolytic action occurs and electrolysis time can be shortened.

Description

Electrolyzer for extracting nonmetallic inclusions in steel.

The present invention relates to an electrolytic cell which is an essential device for extracting non-metallic inclusions contained in steel by electrolysis. More specifically, the inside of the electrolytic cell includes an electrolyte supply part, an electrolyte discharge part, and an electrolytic extracting part, and an inert gas at the bottom of the electrolytic cell. The present invention relates to an electrolytic cell for extracting nonmetallic inclusions in steel, which can process multiple samples at the same time by maintaining a constant electrolyte concentration.

In general, the non-metallic inclusion extraction method in steel is provided with a steel sample on the anode side and a negative electrode plate on the cathode side, and after filling a certain concentration of electrolyte in the electrolytic cell, applying a DC power supply to decompose the steel sample of the anode by electrolysis to dissolve in the electrolyte solution. Non-metallic inclusions, which are not oxides, are collected and collected in a cotton cloth for collecting residues.

Conventional electrolyzers for this purpose include Korean Utility Model No. 89-20629 (hereinafter conventional 1) and Korean Utility Model Application No. 95-34084 (hereinafter conventional 2).

First, the electrolytic cell of the prior art 1 as shown in FIG. 1 uses the liquid feed pump 7 to circulate the electrolyte solution stagnated in the electrolytic cell 20, and the filter cloth for acid resistance so that the cleanliness of the electrolyte solution is always maintained at the liquid feed part side. 6) is installed to make uniform electrolyte at all times.

However, the agitation effect of the electrolytic cell is only the circulation of the electrolytic solution by the liquid feeding pump (7), so that the stirring effect in the longitudinal direction of 1700 mm is very insufficient, resulting in uneven concentration of the electrolytic solution in the electrolytic cell 20, and thus the positive electrode specimen in the electrolytic cell. The rate of dissolution depends on the position of.

In addition, in the case of fine residues, the residue collecting cotton cloth 5 installed on the anode side called the extraction cotton cloth is contaminated and the electrolyte is contaminated. Thus, an acid-resistant filter cloth 6 is installed to collect the residue, but it is deposited in the electrolyte solution. If the filter cloth is clogged because of the large amount of residue, it is difficult to replace the filter cloth (6).

On the other hand, the electrolytic cell of the prior art shown in Figure 2 is installed by the two ends of the electrolytic bath 20-1, the resistance plate 30. 30-1 of two different heights for the purpose of concentration and uniform dissolution of the electrolyte solution by smooth stirring The concentration in the electrolytic cell 20-1 is designed to be constant, and also to compensate for the disadvantages of the conventional filter cloth 6, by installing a cartridge type filter 41 outside the electrolytic cell 20-1 of the filter cloth 6 When necessary, they can be replaced at any time.

However, the stirring effect of the electrolytic cell 20-1 is rapid dissolution at both ends, but in the middle portion of the electrolytic cell 20-1, flow is generated only at the surface of the electrolyte, and concentration uniformity with both ends is not achieved.

Therefore, the electrolyte cleanliness of the middle portion of the electrolytic cell 20-1 is insufficient and the electrolysis time is long.

The object of the present invention is to provide an electrolytic cell for extracting non-metallic inclusions in the steel to maintain the same concentration of the electrolyte solution inside the electrolytic cell and to enhance the agitation to achieve the same amount of dissolution at the same time. It is done.

1 and 2 are a perspective view of a conventional electrolytic apparatus for extracting non-metallic inclusions,

3 is a perspective view of an electrolytic cell according to the present invention,

4 is a cross-sectional view of the electrolytic cell according to the present invention,

5 is a sample dissolution rate comparison diagram of a conventional electrolytic cell and an electrolytic cell according to the present invention,

Figure 6 is a comparison of the time required for complete dissolution of the sample by the electrolytic cell according to the conventional electrolytic cell.

<Description of the code used in the main part of the drawing>

1: negative electrode bar, 2: positive electrode bar, 3: negative plate, 4: specimen,

5: cotton cloth for collecting residues, 6: filter cloth, 7: electrolyte circulation pump,

9: hydrochloric acid storage container, 12: circulation hose, 13: inert gas supply pipe,

14: electrolyte discharge hole, 18: inert gas, 20, 20-1, 20-2: electrolytic cell,

21: electrolyte solution supply part, 22, 22-1: electrolyte solution discharge part, 23, 23-1: electrolytic extraction part,

30, 30-1: resistance plate, 31, 31-1: liquid supply part resistance plate, 32, 32-1: drainage part resistance plate,

41: cartridge filter,

In the rectangular electrolytic cell having a hydrochloric acid reservoir to circulate the electrolyte and a circulating pump for extracting non-metallic inclusions in the steel in order to achieve the above object, between the two liquid supply part resistance plate installed in the center of the electrolytic cell Located at the outer side of the electrolyte supply portion to which the electrolyte is supplied by the circulation pump, and a plurality of electrolyte supply holes at the lower end with a lower height than the liquid supply portion resistance plate and installed on both ends of the electrolytic cell And an electrolyte discharge part for discharging the electrolyte with a circulating pump, and positioned between the electrolyte supply part and the electrolyte discharge part and having an agitation by dropping the electrolyte, an inert gas supply pipe is installed to prevent stagnation of the electrolyte. Characterized in that consisting of the electrolytic extracting portion It provides an electrolytic cell for extracting nonmetallic inclusions in steel.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Figure 3 is a perspective view of an electrolytic cell according to the present invention, Figure 4 is a cross-sectional view of the electrolytic cell according to the present invention, Figure 5 is a comparison of the sample dissolution rate of the conventional electrolytic cell and the electrolytic cell according to the present invention, Figure 6 is a conventional electrolytic cell and It is a comparison of the time required for complete dissolution of the sample by the electrolytic cell of the present invention.

The present invention, as shown in Figures 3 and 4 in the electrolytic extraction electrolytic cell for extracting the inclusions in the steel, the rectangular electrolytic cell (20-2) to the size that can simultaneously deliver 10 to 15 specimens depending on the distance between the poles The electrolyzer 20-2 is divided into an electrolyte supply unit 21, an electrolytic extracting unit 23, and an electrolyte discharge unit 22 according to the function of the supplied electrolyte solution.

First, the liquid supply part resistance plates 31 and 31-1 having a predetermined height at the bottom of the electrolytic cell 20-2 and the drain part resistance plate 32 having a lower height than the liquid supply part resistance plates 31 and 31-1. , 32-1).

And an inert gas such as argon or nitrogen to the electrolyte extracting portions 23 and 23-1 located between the liquid supply part resistance plates 31 and 31-1 and the drain part resistance plates 32 and 32-1. An inert gas supply pipe 13 capable of supplying 18 is provided.

Meanwhile, in each of the electrolytic extracting portions 23 and 23-1, the specimen 4 is placed in the face cloth 5 for collecting the residue, and fixed to the positive electrode busbar 2 using the positive electrode hook, and the negative electrode plate 3 is It is fixed to the negative electrode bar (1) using a negative electrode hook, a circulation hose 12 and a circulation pump (7) for circulating the electrolyte solution supplied in the electrolytic cell (20-2) is provided, the circulation pump (7) The cartridge type filter 41 is installed in the circulation hose between the and the electrolyte supply unit 21.

In addition, a circulation hose 12 is connected to each of the electrolyte discharging parts 22 and 22-1 collecting the electrolytes having completed the electrolytic and dissolving operations, respectively, and the electrolyte is discharged to the circulation pump 7 outside the electrolytic cell 20-2. Resupply.

Hereinafter, the operation of the present invention will be described.

The present invention having the above-described configuration is provided in the liquid supply part resistance plates 31 and 31-1 and the drainage part resistance plates 32 and 32-1 provided at the center and both ends of the electrolytic cell 20-2, as shown in FIG. An inert gas supplied by the inert gas supply pipe 13 installed in the electrolytic extracting units 23 and 23-1 occurs due to the flow of the electrolytic solution in the electrolytic cell 20-2 due to the drop motion of the electrolytic solution. Due to the blowing action of (18), the middle part of the electrolytic cell 20-2 also stirs without stagnation of the electrolyte solution.

Table 1.

Classification (Sample Position) The present invention Conventional 1 Conventional 2 Electrolytic (g) After electrolysis (g) Dissolution amount (g) Dissolution rate (%) Electrolytic (g) After electrolysis (g) Dissolution amount (g) Dissolution rate (%) Electrolytic (g) After electrolysis (g) Dissolution amount (g) Dissolution rate (%) One 613.4 165.6 447.8 73 602.1 204.7 397.4 66 608.7 170.4 438.3 72 2 611.1 165 446.1 73 616.1 215.6 400.5 65 610.1 183 427.1 70 3 614.4 172 442.4 72 613.4 245.3 368.1 60 607.4 194.3 413.1 68 4 613.7 171.8 441.9 72 616.7 277.5 339.2 55 609.3 231.5 377.8 62 5 626.2 169.1 457.1 73 602.3 313.2 289.1 48 611.3 256.7 354.6 58 6 620.8 167.6 453.2 73 615.3 326.1 289.2 47 608.6 261.7 346.9 57 7 621.7 167.9 453.8 73 612.2 306.2 306.1 50 607.3 267.2 340.1 56 8 622.4 174.3 448.1 72 611.8 269.2 342.6 56 606.4 206.2 400.2 66 9 614.9 172.2 442.7 72 612.6 220.5 392.1 64 610.3 189.2 421.1 69 10 614.5 165.9 448.6 73 610.5 213.7 396.8 65 609.3 182.8 426.5 70 Average 617.3 169.1 448.2 72.6 613.1 259.2 352.1 57.6 608.9 214.3 394.6 64.8

Table 1 and Figure 5 shows the effect between the electrolytic cell according to the present invention and the conventional electrolytic cell after the electrolysis of 10 specimens for 80 hours to show the result of comparing the amount of dissolution and dissolution rate.

In case of electrolysis in the electrolytic cell of the prior art 1, 352.1 g was dissolved and showed an average dissolution rate of 58% relative to the weight before electrolysis.In the case of the electrolytic cell in the prior art 2, 394.6 g was dissolved and about 65% was dissolved. In the case of the electrolyzer according to the present invention, an average of 448.2 g was dissolved to show a dissolution rate of about 73%, indicating that the dissolution rate of the electrolyzer according to the present invention was improved by about 8 to 15%, and that the overall dissolution was uniform.

And as shown in Figure 6, even in the dissolution time of the conventional electrolytic cell takes 121 ~ 200 hours, 114 ~ 178 hours, respectively, it can be seen the presence of the non-uniformity and stagnation of the concentration depending on the location, the present invention is an electrolytic cell Regardless of the specimen position at, the electrolysis showed almost uniform electrolysis for 110 hours and the electrolysis time decreased.

According to the present invention as described above, the agitation of the electrolyte solution is induced by the flow of the dropping of the electrolyte by the liquid supply part resistance plate and the drainage part resistance plate installed in the electrolytic cell and the flow of the gas blowing by the inert gas supply pipe, Uniform electrolytic action occurs and electrolysis time can be shortened.

Claims (1)

In the electrolytic cell used in the electrolytic extraction operation of steel inclusions, An electrolyte supply unit 21 positioned between two liquid supply unit resistance plates 31 and 31-1 provided at the center of the electrolytic cell 20-2; An electrolyte supply hole 14 is formed at a lower end of the liquid supply part resistor plates 31 and 31-1, and the drain part resistance plates 32 and 32-1 are provided at both ends of the electrolytic cell 20. Electrolyte solution discharge parts 22 and 22-1 positioned at the outer side of each other; It is located between the electrolyte supply unit 21 and the electrolyte discharge unit 22, the non-metal in the steel, characterized in that consisting of the electrolytic extraction unit 23, 23-1 is provided with an inert gas supply pipe 13 Electrolyzer for extracting inclusions.