CN113061941A

CN113061941A - Bismuth removing method in high bismuth crude lead electrolysis process

Info

Publication number: CN113061941A
Application number: CN202110303204.2A
Authority: CN
Inventors: 刘罗平
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-07-02

Abstract

The invention discloses a bismuth removing method in the electrolysis process of high bismuth lead bullion, which comprises the steps of adding lead powder with the granularity of more than 100 meshes into board washing water, electrolysis mother liquor and rinsing water of anode slime, and replacing bismuth with lead; separating bismuth into anode mud by a precipitation method or a filter pressing method. Compared with the prior art, the bismuth removing method in the high-bismuth lead bullion electrolysis process has the following advantages: the bismuth removing effect can reach more than 95 percent, the bismuth removing cost is low, and the normal production of electrolysis is not influenced.

Description

Bismuth removing method in high bismuth crude lead electrolysis process

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of bismuth removal, in particular to a bismuth removal method in the electrolysis process of high-bismuth lead bullion.

[ background of the invention ]

Bismuth in mother liquor in the electrolysis process of crude lead with high bismuth content can not be accumulated, when bismuth ions in the electrolysis mother liquor reach a certain numerical value and generally exceed 35mg/L in the electrolysis mother liquor, bismuth element of electrolytic lead can exceed 20PPm, the quality requirement of battery enterprises on the electrolytic lead can not be met, lead-acid batteries are the largest application of electrolytic lead in China, when the concentration of the bismuth ions in the electrolysis mother liquor is higher than 50mg/L, the quality of the electrolytic lead can be higher than 40PPm of national standard, and bismuth removal needs to be carried out on plate washing water, anode slime filtrate and the electrolysis mother liquor in the electrolysis process.

[ summary of the invention ]

The invention aims to provide a bismuth removing method in the electrolysis process of high-bismuth lead bullion, which can solve the technical problems related to the background technology.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a bismuth removing method in the electrolysis process of high bismuth lead bullion comprises the steps of adding lead powder with the particle size of more than 100 meshes into plate washing water, electrolysis mother liquor and rinsing water of anode slime, and replacing bismuth with lead; separating bismuth into anode mud by a precipitation method or a filter pressing method.

As a preferred improvement of the present invention: the temperature of the plate washing water, the electrolysis mother liquor and the rinsing water of the anode mud is above 50 ℃.

As a preferred improvement of the present invention: the replacement time of lead for bismuth was 1 hour.

As a preferred improvement of the present invention: the substitution temperature of lead-substituted bismuth is 45 ℃ to 80 ℃.

As a preferred improvement of the present invention: the amount of lead powder added was 1.5 times the amount of bismuth displaced.

As a preferred improvement of the present invention: stirring is carried out by a stirring barrel and displacement reaction is utilized to realize displacement of bismuth by lead.

As a preferred improvement of the present invention: the method for separating bismuth from the anode mud by using a filter pressing method specifically comprises the following steps: and (3) carrying out liquid-solid separation on the displaced sponge bismuth by using a plate-and-frame filter press, separating the bismuth into anode mud, recovering the bismuth by a subsequent process, and recycling the filter press liquid into a circulating system of the electrolyte.

As a preferred improvement of the present invention: the concentration of bismuth ions in the plate washing water, the electrolysis mother liquor and the rinsing water of the anode slime exceeds 35 mg/L.

Compared with the prior art, the bismuth removing method in the high-bismuth lead bullion electrolysis process has the following advantages: the bismuth removing effect can reach more than 95 percent, the cost is very low, and the normal production is not influenced.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a flow chart of the bismuth removal method in the high bismuth lead bullion electrolysis process of the invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a bismuth removing method in the electrolysis process of high bismuth lead bullion, which comprises the following steps:

step S1, adding lead powder with a particle size of more than 100 meshes into the plate washing water, the electrolytic mother solution and the rinsing water of the anode slime, and replacing bismuth with lead;

specifically, the concentration of bismuth ions in the plate washing water, the electrolysis mother liquor and the rinsing water of the anode slime exceeds 35mg/L, the temperature is above 50 ℃, the replacement time of lead replacing bismuth is 1 hour, and the replacement temperature is 45-80 ℃. The amount of lead powder added was 1.5 times the amount of bismuth displaced. The displacement of bismuth by lead specifically includes stirring by a stirring barrel and utilizing a displacement reaction to effect the displacement of bismuth by lead.

And step S2, separating bismuth in the anode mud by using a precipitation method or a filter pressing method.

Specifically, the step of separating bismuth from the anode slime by a filter pressing method specifically comprises the following steps: and (3) carrying out liquid-solid separation on the displaced sponge bismuth by using a plate-and-frame filter press, separating the bismuth into anode mud, recovering the bismuth by a subsequent process, and recycling the filter press liquid into a circulating system of the electrolyte.

While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the specification and the embodiments, which are fully applicable to various fields of endeavor for which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. A bismuth removing method in the electrolysis process of high bismuth lead bullion is characterized in that: adding lead powder with the granularity of more than 100 meshes into plate washing water, electrolytic mother liquor and rinsing water of anode slime, and replacing bismuth with lead; separating bismuth into anode mud by a precipitation method or a filter pressing method.

2. The method for removing bismuth in the electrolysis process of the high-bismuth lead bullion according to claim 1, which is characterized in that: the temperature of the plate washing water, the electrolysis mother liquor and the rinsing water of the anode mud is above 50 ℃.

3. The method for removing bismuth in the electrolysis process of the high-bismuth lead bullion according to claim 1, which is characterized in that: the replacement time of lead for bismuth was 1 hour.

4. The method for removing bismuth in the electrolysis process of the high-bismuth lead bullion according to claim 1, which is characterized in that: the substitution temperature of lead-substituted bismuth is 45 ℃ to 80 ℃.

5. The method for removing bismuth in the electrolysis process of the high-bismuth lead bullion according to claim 1, which is characterized in that: the amount of lead powder added was 1.5 times the amount of bismuth displaced.

6. The method for removing bismuth in the electrolysis process of the high-bismuth lead bullion according to claim 1, which is characterized in that: stirring is carried out by a stirring barrel and displacement reaction is utilized to realize displacement of bismuth by lead.

7. The method for removing bismuth in the electrolysis process of the high-bismuth lead bullion according to claim 1, which is characterized in that: the method for separating bismuth from the anode mud by using a filter pressing method specifically comprises the following steps: and (3) carrying out liquid-solid separation on the displaced sponge bismuth by using a plate-and-frame filter press, separating the bismuth into anode mud, recovering the bismuth by a subsequent process, and recycling the filter press liquid into a circulating system of the electrolyte.

8. The method for removing bismuth in the electrolysis process of the high-bismuth lead bullion according to claim 1, which is characterized in that: the concentration of bismuth ions in the plate washing water, the electrolysis mother liquor and the rinsing water of the anode slime exceeds 35 mg/L.