A method for recovering lead from waste lead plaster by solid-phase electrolysis

A technology of solid-phase electrolysis and waste lead paste, which is applied in the field of lead recycling, can solve the problems of high cost, heavy pollution, and high energy consumption of lead recycling, and achieve the effects of reducing recycling costs, high conductivity, and reducing reagent consumption

Active Publication Date: 2021-07-27
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention solves the technical problems of high energy consumption, heavy pollution and high cost in recovering lead from waste lead paste in the prior art, and provides a method for recovering lead from waste lead paste by solid-phase electrolysis. The paste is prepared as an electrolytic material and coated on the cathode for electrolysis. During the electrolysis process, the water on the anode loses electrons to form oxygen, and the electrolytic material on the cathode receives electrons and is reduced in situ to form lead, which is attached to the cathode plate, that is, from the waste Lead recovered from lead paste

Method used

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  • A method for recovering lead from waste lead plaster by solid-phase electrolysis
  • A method for recovering lead from waste lead plaster by solid-phase electrolysis
  • A method for recovering lead from waste lead plaster by solid-phase electrolysis

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Experimental program
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Effect test

Embodiment 1

[0037]The recovered 12V, 14AH waste lead-acid batteries were crushed and separated to obtain 2.4kg waste lead paste. First, the waste lead paste is crushed by a pulverizer to obtain lead paste particles. Take 30 g of the crushed lead paste particles and put them into the reaction tank, add 3 g of water, and after stirring evenly, use a coater to evenly coat the mixture in the reaction tank to A stainless steel cathode plate with a thickness of 1.0 cm, put the coated cathode plate into an oven and cure at 80-100° C. for 1 hour to obtain the cathode part.

[0038] Put the cathode into the electrolytic cell. There are 400mL electrolyte and magnetic stirring rotor in the electrolytic cell. Fix the position of the anode in parallel at 2cm above the cathode for electrolysis. The electrolytic cell is a cylindrical container with a diameter of 7 cm and a height of 10 cm. The anode is a circular titanium-based iridium-coated tantalum mesh with a diameter of 6.5 cm. The electrolyte is 2...

Embodiment 2

[0040] The recovered 12V, 14AH waste lead-acid batteries were crushed and separated to obtain 2.4kg waste lead paste. First, the waste lead paste is crushed by a pulverizer to obtain lead paste particles. Take 10 g of the crushed lead paste particles and put them into the reaction tank, add 10 g of water, and after stirring evenly, use a coater to evenly coat the mixture in the reaction tank to The cathode plate is framed by a titanium plate with a thickness of 0.5 cm. The coated cathode plate is put into an oven and cured at 80-100° C. for 3 hours to obtain the cathode part.

[0041] Put the cathode into the electrolytic cell. There are 1000mL electrolyte and magnetic stirring rotor in the electrolytic cell. Fix the anode position in parallel at 5cm above the cathode for electrolysis. The electrolytic cell is a cylindrical container with a diameter of 10cm and a height of 8cm. The anode is a circular platinum mesh with a diameter of 6.5cm. The electrolyte is a mixed solution ...

Embodiment 3

[0043] The recovered 12V, 14AH waste lead-acid batteries were crushed and separated to obtain 2.4kg waste lead paste. First, the waste lead paste is crushed by a pulverizer to obtain lead paste particles. Take 50g of the crushed lead paste particles and put them into the reaction tank, add 2.5g of water, and after stirring evenly, use a coater to evenly coat the mixture in the reaction tank. To the cathode plate of the stainless steel lead-plated frame, the thickness is 2cm, put the coated cathode plate into an oven and cure it at 80-100°C for 0.5h to obtain the cathode part.

[0044] Put the cathode into the electrolytic cell, and there are 250mL electrolyte and magnetic stirring rotor in the electrolytic cell, fix the position of the anode in parallel at 2.5cm above the cathode, and perform electrolysis. The electrolytic cell is a cylindrical container with a diameter of 7 cm and a height of 10 cm. The anode is a circular gold mesh with a diameter of 6.5 cm. The electrolyte ...

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Abstract

The invention discloses a method for recovering lead from waste lead plaster by a solid-phase electrolysis method, belonging to the technical field of lead resource recovery. Firstly, the waste lead paste is made into a pasty waste lead paste electrolytic material, and coated on the cathode plate; the electrolyte solution is added to the electrolytic cell; the cathode plate coated with the electrolytic material is inserted into the electrolyte solution, and the anode is inserted into the electrolyte solution middle; the anode is an electrode with oxygen-evolving electrocatalysis; the cathode plate and the anode are respectively connected to the negative pole and the positive pole of the DC power supply, so that electrolysis takes place in the electrolytic cell; the water on the anode loses electrons to precipitate oxygen, and the electrolytic material on the cathode plate is obtained The electrons are reduced in situ to generate simple lead, which is attached to the cathode plate, that is, lead is recovered from waste lead paste. In the present invention, the waste lead paste is directly electrolyzed after simple pulping, and the lead sulfate, lead dioxide and lead monoxide in the waste lead paste are obtained by electrons to generate lead element in situ, which saves a large number of pretreatment procedures and reduces reagents. The consumption makes the process simple and reduces the cost.

Description

technical field [0001] The invention relates to the technical field of lead resource recovery, and more particularly, relates to a method for recovering lead from waste lead plaster by solid-phase electrolysis. Background technique [0002] As the battery product with the largest output in the world, lead-acid batteries have mature and safe technology, low-cost materials, good recycling ability and reliable charge and discharge performance. They have an absolute advantage in market competition and have occupied 80% of the secondary power supply. % of the market share, lead-acid batteries play an important role in various economic fields such as transportation, communication, electric power, military, navigation, aviation and aerospace. [0003] In 2017, the market size of lead-acid batteries in my country was 95 billion yuan, and the global scale was 316.9 billion yuan, which is expected to continue to grow. The processing capacity of the corresponding waste lead-acid batte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/18C25C7/02C25C7/06C25B1/01C25B1/02C25B11/052C25B11/063C25B11/089C25B11/031C25B11/042C25B15/08H01M10/54
CPCC25B1/00C25B15/08C25C1/18C25C7/02C25C7/06C25B11/051C25B11/057C25B11/081H01M10/54Y02W30/84
Inventor 吴旭薛雅文韦聚才古月圆熊睿
Owner HUAZHONG UNIV OF SCI & TECH
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