Electrolysis method of lead with high bismuth content

A lead electrolysis and electrolyte technology, applied in electrolysis process, electrolysis components, electrodes, etc., can solve the problems of inability to produce high-grade lead, deterioration of production status, unsuitable treatment of crude lead, etc.

Active Publication Date: 2019-09-27
富民薪冶工贸有限公司
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  • Abstract
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AI Technical Summary

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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  • Electrolysis method of lead with high bismuth content

Examples

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℃;

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

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

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

[0025] (7) The physical specification of anode: 740mm×600(±20)mm×30mm, the weight of a single piece is 80kg~100kg; the physical specification of cathode: 900mm×670mm×1mm;

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

[0027] Further, the intermediate piece is between the anode and the lead piece, and the distance between the lead piece and 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℃;

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

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

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

[0036] (7) The physical specification of anode: 740mm×600(±20)mm×30mm, the weight of a single piece is 80kg~100kg; the physical specification of cathode: 900mm×670mm×1mm;

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

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

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℃;

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

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

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

[0047] (7) The physical specification of anode: 740mm×600(±20)mm×30mm, the weight of a single piece is 80kg~100kg; the physical specification of cathode: 900mm×670mm×1mm;

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

[0049] Further, the intermediate piece is between the anode and the lead piece, and the distance between the lead piece and the ...

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Abstract

The invention belongs to the field of lead production, and particularly relates to an electrolysis method of lead with high bismuth content. The electrolysis conditions of the electrolysis method are as follows: (1). the chemical mass of an anode: Bi is less than or equal to 25%, Pb is less than or equal to 80%, Sb is less than or equal to 6%; the composition of electrolyte: H2SiF6: 40-80g / L; Pb2+: 20-80g / L; Bi2+: less than 0.006g / L; (2). the electrolyte circulation: 25L / min-30L / min; (3). the electrolysis temperature: 20-30 DEG C; (4). the current density: 60-80A / m<2>; and (5). the electrolysis period: 5 to 8 days. The cathode is divided into two pieces; one piece is a lead piece; the other piece is an intermediate piece; the lead piece is connected to the cathode of a power source; and the intermediate piece is grounded and comprises bismuth and / or copper. The intermediate piece is arranged between the anode and the cathode and is grounded, so that the bismuth in the anode can be separated out from the intermediate piece after being electrolyzed; the lead is separated out from the cathode (lead piece); and the problem that the bismuth is separated out from the cathode (lead sheet) can be effectively solved by the method.

Description

Technical field [0001] The invention belongs to the field of lead production, and specifically relates to a lead electrolysis method containing high bismuth. Background technique [0002] Lead electrolytic refining is to use lead with a small amount of impurities after preliminary pyrolysis refining as the anode, electrolysis to get the lead as the cathode, hanging in the electrolytic cell containing the electrolyte, and direct current for chemical reaction to obtain pure lead and The process of anode slime containing valuable metals. The advantage of the current general process is that it can handle bismuth <1% crude lead, while obtaining high-purity lead; but it is not suitable to deal with bismuth> More than 10% crude lead. With the intensification of market competition and the successive mining of mines in various regions, the source of minerals has changed greatly. The impurities of crude lead produced by small and medium-sized smelters in various regions fluctuate wi...

Claims

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Application Information

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Patent Type & Authority Applications(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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