Method for recovering lead from waste lead paste by solid phase electrolysis method

A technology of solid-phase electrolysis and waste lead paste is applied in the field of lead recovery, which can solve the problems of large pollution, high cost, and high energy consumption for lead recovery, and achieve the effects of high conductivity, lower recovery costs, and lower reagent consumption.

Active Publication Date: 2020-07-28
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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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

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  • Method for recovering lead from waste lead paste by solid phase electrolysis method
  • Method for recovering lead from waste lead paste by solid phase electrolysis method
  • Method for recovering lead from waste lead paste by solid phase electrolysis method

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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 paste by a solid phase electrolysis method, and belongs to the technical field of lead resource recovery. The method for recoveringthe lead from the waste lead paste by the solid phase electrolysis method comprises the steps that the waste lead paste is first made into a paste waste lead paste electrolytic material and a cathodeplate is coated with the waste lead paste electrolytic material; electrolyte is added to an electrolytic cell; the cathode plate coated with the electrolytic material is inserted into the electrolyte, and an anode is inserted into the electrolyte; the anode is an electrode with oxygen evolution electrocatalysis; the cathode plate and the anode are connected with a negative electrode and a positive electrode of a direct current power supply separately to make electrolysis in the electrolytic cell; and water at the anode loses electrons and precipitates oxygen, the electrolytic material on thecathode plate obtains the electrons and is reduced in situ to a lead single substance and attached to the cathode plate, that is, the lead is recovered from the waste lead paste. The method for recovering the lead from the waste lead paste by the solid phase electrolysis method directly electrolyzes the waste lead paste after simple pulping, lead sulfate, lead dioxide and lead oxide in the waste lead paste obtain the electrons and form in situ the lead simple substance, a large number of pretreatment processes are saved, the consumption of reagents is reduced, the process is simple, and the cost is reduced.

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 Applications(China)
IPC IPC(8): C25C1/18C25C7/02C25C7/06C25B1/00C25B11/10C25B11/08C25B15/08H01M10/54
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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