Method for recycling waste lead-acid battery negative electrode paste and application of recycled materials

Abstract

The invention discloses a method for recovering lead plaster of the negative pole of a disused lead acid storage battery and application of the recovered lead plaster. A preparation method of superfine lead powder comprises the following steps: firstly, a disused battery is fully charged; secondly, the lead plaster of the negative pole is separated from the lead acid storage battery; thirdly, the main substance of the lead plaster of the negative pole is changed into a lead raw material mainly composed of PbO and Pb via high temperature and humidity solidification; and lastly, dry grinding or crumbling of the lead raw material is carried out under the condition of oxygen, or wet treatment is carried out by using organic salt and organic acid to obtain superfine lead powder. The recovery method disclosed by the invention is low in cost, simple and convenient in process, high in recovery rate of lead, low in energy consumption and easy to achieve industrialization, and causes minor pollution to the environment during recovering the lead. The method directly prepares superfine lead powder which can be directly used to produce storage batteries. The superfine PbO powder prepared by the method has good performance, is high in technology added value, and can obtain a battery pole plate which has high electrochemistry capacity and a long charging / discharge service life.

Description

technical field [0001] The invention relates to the recovery and reuse of waste articles, in particular to the recovery and reuse of lead paste of waste lead-acid storage batteries. Background technique [0002] With the continuous development of the economy and society, the development of the national economy and the advancement of science and technology, the demand for various energy storage and power chemical power sources is increasing day by day. At present, the main chemical power sources used are lithium-ion batteries, nickel-metal hydride batteries, fuel cells, lead-acid battery etc. Due to its mature technology and low price, lead-acid batteries are widely used as power sources for electric vehicles and various appliances, as well as various backup and energy storage power sources, but this battery has short life, low specific energy and specific power, Disadvantages such as poor high-current charge and discharge capability, and narrow operating temperature ran...

AI Technical Summary

Problems solved by technology

But it is also inherently energy-intensive, as it requires complex chemicals to dissolve the lead into a form suitable for disposal in batteries.

This process requires a large investment, is difficult to control, has a long cycle, high power consumption, and large alkali consumption, making it difficult to produce on a large scale

[0006] In addition, the metal Pb recovered from the lead paste of waste lead-acid batteries in the prior art is applied to the production of batteries, which needs to be melted and oxidized, and is often prepared into lead powder with PbO as the main component by ball milling or gas phase oxidation, which consumes energy again.

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