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A kind of lead electrolysis method containing high bismuth

A technology of lead electrolysis and electrolyte, which is applied in the direction of electrolysis components, electrolysis process, electrodes, etc., can solve the problems of inability to produce high-grade lead, large fluctuation range of crude lead impurity components, unsuitable treatment of crude lead, etc.

Active Publication Date: 2021-04-27
富民薪冶工贸有限公司
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Problems solved by technology

The advantage of the current general process is that it can process crude lead containing bismuth <1% and obtain high-purity lead at the same time; but it is not suitable for processing crude lead containing more than 10% bismuth
With the intensification of market competition, mines in various places have been exploited one after another, and the ore sources have changed greatly. The impurity composition of crude lead produced by small and medium-sized smelters in various places fluctuates widely, and some contain more than 10% bismuth. This lead is commonly known as lead-bismuth alloy. Treating with the traditional process will make it difficult to control the technical conditions of electrolytic production, the production status will deteriorate, and it will not be possible to produce high-grade lead

Method used

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  • A kind of lead electrolysis method containing high bismuth

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Anode chemical quality: Bi≤25%, Pb≤80%, Sb≤6%;

[0019] Electrolyte composition: H 2 SiF 6 : 40~80g / L; Pb 2+ : 20~80g / L; Bi 2+ : <0.006g / L;

[0020] (2) Electrolyte circulation: 25L / min;

[0021] (3) Electrolysis temperature: 20°C;

[0022] (4) Current density: 60A / m 2 ;

[0023] (5) Electrolysis cycle: 5d;

[0024] (6) Physical specifications of the initial plate (effective electrodeposition area): 780mm×670mm×1mm;

[0025] (7) Anode physical specification: 740mm×600 (±20)mm×30mm, single block weight 80kg~100kg; cathode physical specification: 900mm×670mm×1mm;

[0026] Further, the cathode is divided into two pieces, one is lead, and the other is an intermediate piece, the lead piece is connected to the negative pole of the power supply, and the middle piece is grounded; the middle piece is bismuth.

[0027] Further, the intermediate sheet is between the anode and the lead sheet, the distance between the lead sheet and the intermediate sheet is 5 mm; the ...

Embodiment 2

[0029] (1) Anode chemical quality: Bi≤25%, Pb≤80%, Sb≤6%;

[0030] Electrolyte composition: H 2 SiF 6 : 40~80g / L; Pb 2+ : 20~80g / L; Bi 2+ : <0.006g / L;

[0031] (2) Electrolyte circulation: 25L / min~30L / min;

[0032] (3) Electrolysis temperature: 30°C;

[0033] (4) Current density: 80A / m 2 ;

[0034] (5) Electrolysis cycle: 8d;

[0035] (6) Physical specifications of the initial plate (effective electrodeposition area): 780mm×670mm×1mm;

[0036] (7) Anode physical specification: 740mm×600 (±20)mm×30mm, single block weight 80kg~100kg; cathode physical specification: 900mm×670mm×1mm;

[0037] Further, the cathode is divided into two pieces, one is lead, and the other is an intermediate piece, the lead piece is connected to the negative pole of the power supply, and the middle piece is grounded; the middle piece is bismuth.

[0038] Further, the intermediate sheet is between the anode and the lead sheet, the distance between the lead sheet and the intermediate sheet is 10...

Embodiment 3

[0040] (1) Anode chemical quality: Bi≤25%, Pb≤80%, Sb≤6%;

[0041] Electrolyte composition: H 2 SiF 6 : 40~80g / L; Pb 2+ : 20~80g / L; Bi 2+ : <0.006g / L;

[0042] (2) Electrolyte circulation: 27L / min;

[0043] (3) Electrolysis temperature: 25°C;

[0044] (4) Current density: 70A / m 2 ;

[0045] (5) Electrolysis cycle: 7d;

[0046] (6) Physical specifications of the initial plate (effective electrodeposition area): 780mm×670mm×1mm;

[0047] (7) Anode physical specification: 740mm×600 (±20)mm×30mm, single block weight 80kg~100kg; cathode physical specification: 900mm×670mm×1mm;

[0048] Further, the cathode is divided into two pieces, one is lead, and the other is an intermediate piece, the lead piece is connected to the negative pole of the power supply, and the middle piece is grounded; the middle piece is bismuth.

[0049] Further, the intermediate sheet is between the anode and the lead sheet, the distance between the lead sheet and the intermediate sheet is 8mm; the d...

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Abstract

The present invention belongs to the field of lead production, and specifically relates to a high-bismuth-containing lead electrolysis method. The electrolysis conditions are as follows: (1) Anode chemical quality: Bi≤25%, Pb≤80%, Sb≤6%; electrolyte composition: h 2 SiF 6 : 40~80g / L; Pb 2+ : 20~80g / L; Bi 2+ : <0.006g / L; (2) Electrolyte circulation: 25L / min~30L / min; (3) Electrolysis temperature: 20~30℃; (4) Current density: 60~80A / m 2 ; (5) Electrolysis cycle: 5~8d. The cathode is divided into two pieces, one is lead, and the other is an intermediate piece, the lead piece is connected to the negative pole of the power supply, and the middle piece is grounded; the middle piece is composed of bismuth and / or copper. By setting an intermediate sheet between the anode and the cathode, and the intermediate sheet is grounded, the bismuth in the anode can be precipitated on the intermediate sheet after electrolysis; while lead is deposited on the cathode (lead sheet); through the above method, the cathode can be effectively solved. The problem of bismuth precipitation on the lead sheet.

Description

technical field [0001] The invention belongs to the field of lead production, and in particular relates to a high-bismuth-containing lead electrolysis method. Background technique [0002] Lead electrolytic refining is to use the lead that has undergone preliminary fire refining but still has a small amount of impurities as the anode, and use the electrolysis to separate the lead as the cathode, hang it in the electrolytic cell filled with the electrolyte, and conduct a chemical reaction through direct current to obtain pure lead and The process of anode slime containing valence metals. The advantage of the current general process is that it can process crude lead containing bismuth <1% and obtain high-purity lead at the same time; but it is not suitable for processing crude lead containing more than 10% bismuth. With the intensification of market competition, mines in various places have been exploited one after another, and the ore sources have changed greatly. The imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/18C25C7/02
CPCC25C1/18C25C7/02
Inventor 张浩戴俊普曹远栋林建旺唐晓明王荣权李云涛杨平崔纪义李龙仙刘方亮
Owner 富民薪冶工贸有限公司
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