CN116356374A - Bismuth element removing equipment and method in lead electrolysis production - Google Patents

Abstract

The invention discloses a device and method for removing bismuth element in lead electrolysis production, wherein the removal device includes: an electrolytic tank, a washing tank and a lower tank; the liquid outlet of the washing tank is connected with the electrolytic tank, and the electrolytic tank The liquid outlet is connected with the washing tank, and the liquid in the electrolytic tank and the washing tank circulates; the lower tank is connected with the liquid outlet of the washing tank. The removal equipment in the present invention has simple structure and convenient operation, and can effectively remove the bismuth element in the washing water.

Description

Equipment and method for removing bismuth element in lead electrolytic production

technical field

The invention relates to the technical field of metal smelting, in particular to a device and method for removing bismuth in lead electrolytic production.

Background technique

In the lead electrolysis production process, due to the high bismuth element in the raw ore, it is enriched in the semi-finished crude lead during fire smelting. The bismuth element in the electrolytic anode plate cast by this crude lead is also high, and the anode plate is in the electrolysis process. , the lead element in the anode is enriched on the cathode plate, which is taken out and cast into lead ingots for sale; while the impurities in the lead anode form an anode slime with adhesion, which is washed and stirred with water after being taken out, and the solid-liquid separation is carried out by pressure filtration to form a liquid It is washing water. After repeated use for a period of time, because the washing water contains a large amount of lead ions and fluorosilicic acid, it must be added to the electrolyte for reuse. At this time, due to the high content of bismuth in the washing water, the bismuth content in the electrolyte will increase after reuse. , resulting in excessive bismuth content in lead ingots, resulting in unqualified lead ingots.

Now, because the crude lead produced by fire smelting contains 0.3-0.6% of bismuth, the bismuth contained in the lead anode plate is also in the range of 0.3-0.6%, which leads to the increase of bismuth in the anode slime during the lead electrolysis production process. , when the anode slime is washed with washing water, slurried, stirred and filtered for solid-liquid separation, part of the bismuth element in the anode slime enters the washing water, and when the washing water is reused in the lead electrolyte, the bismuth element in the washing liquid When it is brought into the lead electrolyte, the bismuth element in the lead electrolyte is greater than 0.008g/L, resulting in more than 0.002% of the bismuth element in the precipitated lead, and the final lead ingot is unqualified, affecting normal production and customer satisfaction.

Therefore, it is an urgent problem for those skilled in the art to develop a device and method for removing bismuth in lead electrolytic production that is easy to operate and can remove bismuth.

Contents of the invention

In view of this, the present invention provides a device and method for removing bismuth in lead electrolytic production, which is easy to operate and can remove bismuth.

In order to achieve the above object, the present invention adopts the following technical solutions:

A device for removing bismuth in lead electrolytic production, comprising:

electrolyzer,

A water washing tank, the liquid outlet of the washing water tank is connected with the electrolytic tank, the liquid outlet of the electrolytic tank is connected with the washing water tank, and the liquid in the electrolytic tank and the washing water tank circulates;

A low-level tank, the low-level tank communicates with the liquid outlet of the washing tank.

The beneficial effect of adopting the above-mentioned technical solution is that, in the present invention, a closed loop is formed between the electrolytic tank and the washing tank, and the washing water can be repeatedly electrolyzed until the content of the bismuth element in the washing water is below 0.03g/L. The water is transported to the lower tank for recycling to realize the removal of bismuth in the washing water, thus avoiding the phenomenon that the content of bismuth in electric lead ingots exceeds the standard due to the reuse of washing water with high bismuth content.

Preferably, there are multiple electrolytic tanks, and the multiple electrolytic tanks are all connected to the washing tank; a solution pump is provided between the electrolytic tank and the washing tank. The setting of the solution pump is convenient to transport the water in the washing tank to the electrolytic tank.

Preferably, a liquid level control valve is provided at the liquid outlet of the electrolytic cell, and a switch valve is provided at the liquid inlet.

Preferably, a switch valve is provided between the lower tank and the washing tank. During the electrolysis process, the washing water circulates between the washing tank and the electrolytic tank. Only when the content of bismuth element in the washing water meets the requirements, the on-off valve can be opened to transport the washing water to the lower tank for recycling.

A method for removing bismuth in lead electrolytic production, comprising the steps of:

1) First transport the washing water containing bismuth elements greater than 0.03g/L to the washing tank during the lead electrolysis process, and transport the washing water to each electrolytic tank through the solution pump;

2) After the washing water is transported to the electrolytic cell, the lead cathode and anode plates with good row spacing are transported to the electrolytic cell by automatic driving;

3) Open the switch valve of the liquid inlet of the electrolytic tank, and the washing water in the electrolytic tank flows into the washing tank through the overflow pipe of the electrolytic tank, forming a closed circuit between the washing tank and the electrolytic tank;

4) After the washing water is electrolyzed, through analysis, when the bismuth element in the washing water drops below 0.03g/L, open the on-off valves of the washing water tank and the lower tank to recover the washing water.

Preferably, the liquid level of the electrolytic cell in step 2) is controlled by a liquid level control valve, and the liquid level is 500 mm away from the top of the electrolytic cell.

Preferably, the content of bismuth element in the washing water is detected after the washing water in step 4) is electrolyzed for 8-12 hours.

Preferably, after 4-7 days of electrolysis, the anode plate and cathode plate are taken out for replacement.

It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a device and method for removing bismuth in lead electrolytic production, and its beneficial effects are:

(1) In the present invention, a small electrolysis system is used to solve the problem of lead and acid waste and volume expansion caused by the high content of bismuth in the crude lead produced by fire smelting, which affects the anode slime washing water and cannot be reused; Solved the problem of unqualified lead ingots caused by the reuse of high-bismuth-containing washing water;

(2) The equipment in the present invention is simple to operate, the processing time is short, and the cost generated is low, and the bismuth-containing washing water after processing fully meets the requirements of lead electrolysis.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a schematic structural view of the removal equipment provided by the present invention.

Among them, in the figure,

1- electrolytic tank; 2- washing tank; 3- low tank; 4- solution pump.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The embodiment of the present invention discloses a device for removing bismuth in lead electrolytic production, including:

Electrolyzer 1,

The washing tank 2, the liquid outlet of the washing tank 2 is connected with the electrolytic tank 1, the liquid outlet of the electrolytic tank 1 is connected with the washing tank 2, and the liquid in the electrolytic tank 1 and the washing tank 2 circulates;

The lower tank 3 communicates with the liquid outlet of the washing tank 2. In the present invention, a cathode plate and an anode plate are placed in the electrolytic cell 1, and the bismuth element in the washing water is adsorbed to the cathode plate during the electrolysis process, thereby removing the bismuth element in the washing water.

In order to further optimize the above technical solution, there are multiple electrolytic tanks 1, and the multiple electrolytic tanks 1 are all connected to the washing tank 2; a solution pump 4 is provided between the electrolytic tank 1 and the washing tank 2. There are three electrolytic tanks 1, and they are respectively connected with the washing water tank 2, and the washing water is electrolyzed at the same time, so as to improve the efficiency of electrolysis of bismuth element.

In order to further optimize the above technical solution, a liquid level control valve is provided at the liquid outlet of the electrolytic cell 1, and an on-off valve is provided at the liquid inlet.

In order to further optimize the above technical solution, an on-off valve is provided between the lower tank 3 and the washing tank 2 .

A method for removing bismuth in lead electrolytic production, comprising the steps of:

1) first transport the washing water containing bismuth elements greater than 0.03g/L to the washing tank 2 during the lead electrolysis process, and transport the washing water to each electrolytic tank 1 through the solution pump 4;

2) After the washing water is transported to the electrolytic cell 1, the cathode plate and the anode plate with good row spacing are transported to the electrolytic cell 1 by automatic driving;

3) Open the switch valve of the liquid inlet of the electrolytic tank 1, and the washing water in the electrolytic tank 1 flows into the washing water tank 2 through the overflow pipe of the electrolytic tank 1, forming a closed circuit between the washing water tank 2 and the electrolytic tank 1;

4) After the washing water is electrolyzed, through analysis, when the bismuth element in the washing water drops below 0.03g/L, open the switch valves of the washing water tank 2 and the lower tank 3 to recover the washing water.

In order to further optimize the above technical solution, the liquid level of the electrolytic cell 1 in step 2) is controlled by a liquid level control valve, and the liquid level is 500 mm away from the top of the electrolytic cell 1 .

In order to further optimize the above-mentioned technical scheme, the bismuth element content in the washing water is detected after the washing water in step 4) is electrolyzed for 8-12 hours.

In order to further optimize the above technical solution, after 4-7 days of electrolysis, the anode plate and the cathode plate are taken out for replacement. The replaced cathode plate is directly put back into the anode pot for recasting and reuse. The anode plate needs to be brushed first, and then put back into the anode pot for recasting and reuse.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A kind of removal equipment of bismuth element in lead electrolytic production, it is characterized in that, comprises: electrolyzer (1), Washing tank (2), the liquid outlet of described washing water tank (2) is connected with electrolytic cell (1), and the liquid outlet of described electrolytic cell (1) is connected with washing water tank (2), and described electrolytic cell (1) and the liquid circulation in the washing tank (2); A lower tank (3), the lower tank (3) is in communication with the liquid outlet of the washing tank (2). 2. the removal equipment of bismuth element in a kind of lead electrolytic production according to claim 1, it is characterized in that, described electrolyzer (1) is provided with a plurality of, and a plurality of described electrolyzers (1) are all connected with washing The water tanks (2) are connected; a solution pump (4) is provided between the electrolytic tank (1) and the washing water tank (2). 3. according to the removal equipment of bismuth element in a kind of lead electrolytic production described in claim 1 or 2, it is characterized in that, the liquid outlet place of described electrolyzer (1) is provided with liquid level control valve, and liquid inlet is provided with There is an on-off valve. 4. The device for removing bismuth element in a kind of lead electrolytic production according to claim 3, characterized in that, an on-off valve is arranged between the lower tank (3) and the washing tank (2). 5. the removal method of bismuth element in a kind of lead electrolytic production as claimed in claim 1-4, is characterized in that, comprises the steps: 1) First, the washing water containing bismuth elements greater than 0.03g/L in the lead electrolysis process is delivered to the washing tank (2), and the washing water is delivered to each electrolytic tank (1) through the solution pump (4); 2) After the washing water is transported to the electrolytic cell (1), the cathode plate and the anode plate with good row spacing are transported to the electrolytic cell (1) by automatic driving; 3) Open the switch valve of the liquid inlet of the electrolytic tank (1), and the washing water in the electrolytic tank (1) flows into the washing tank (2) through the overflow pipe of the electrolytic tank (1), forming a washing tank (2) and Closed circulation between electrolyzers (1); 4) After the washing water is electrolyzed, the analysis shows that when the bismuth element in the washing water drops below 0.03g/L, the on-off valves of the washing water tank (2) and the lower tank (3) are opened to recover the washing water. 6. the removal method of bismuth element in a kind of lead electrolytic production according to claim 5, is characterized in that, the liquid level of electrolyzer (1) in described step 2) is controlled by liquid level control valve, and liquid level distance electrolyzer The groove top of the groove (1) is 500mm. 7. The method for removing bismuth in a kind of lead electrolytic production according to claim 5, characterized in that, the content of bismuth in the washing water is detected after the washing water in the step 4) is electrolyzed for 8-12 hours. 8. The method for removing bismuth in a kind of lead electrolytic production according to claim 5, characterized in that, after 4-7 days of electrolysis, the anode plate and the cathode plate are taken out for replacement.

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