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A method for preparing red lead from positive electrode waste lead mud of lead-acid battery

A technology of lead-acid battery and positive electrode paste, applied in lead-acid battery, battery electrode, lead red, etc., can solve the problems of large pollution, low cost, high cost, etc., and achieve the effects of low energy consumption, waste disposal and cost reduction

Active Publication Date: 2019-12-06
CHAOWEI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the present invention provides a method for preparing red lead by using the positive waste lead mud of lead-acid batteries, and at the same time use the positive waste lead mud and positive waste lead paste to prepare red lead, and the purity of the obtained red lead can reach 97wt% In addition, the lead sulfate in the positive electrode waste lead sludge is recovered, and the cost is extremely low, which solves the problems of high cost and large pollution in the preparation process of red lead

Method used

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  • A method for preparing red lead from positive electrode waste lead mud of lead-acid battery

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Effect test

Embodiment 1

[0033] Pretreatment of positive electrode waste lead sludge: mix the positive electrode waste lead sludge of lead-acid battery with pure water at a mass ratio of 1:1, place in a stirring device and stir for 15 minutes, after standing for 20 minutes, remove the upper layer of liquid, and use a plate for the lower layer of material The solid-liquid separation of the frame filter press, the filtrate can be recycled, the filter cake is added to the mixed solution of ammonium sulfate and ammonia water at a mass ratio of 2:1, the temperature of the reaction vessel is raised to 60°C, and the filter cake and the mixed solution are stirred for 0.5 h, filter until no lead sulfate is leached to obtain ammonium sulfate mixed solution and pretreated positive electrode waste lead sludge.

[0034] Preparation of 4BS: Put the obtained ammonium sulfate mixture in a still, set the temperature of the still at 5°C after vacuum decompression, precipitate lead sulfate crystals, distill out ammonia w...

Embodiment 2

[0038] Pretreatment of positive electrode waste lead sludge: mix the positive electrode waste lead sludge of lead-acid battery with pure water at a mass ratio of 1:1.5, place in a stirring device and stir for 10 minutes, after standing for 15 minutes, remove the upper liquid, and use a plate for the lower material The frame filter press is used for solid-liquid separation, and the filtrate can be recycled. The filter cake is added to the mixture of ammonium sulfate and ammonia water at a mass ratio of 2:1.2. The temperature of the reaction vessel is raised to 40°C, and the filter cake and the mixed solution are stirred for 1 hour. , and filter until no lead sulfate is leached to obtain ammonium sulfate mixture and pretreated positive electrode waste lead sludge.

[0039] Preparation of 4BS: Put the obtained ammonium sulfate mixture in a still, set the temperature of the still at 10°C after vacuum decompression, and precipitate lead sulfate crystals. After distilling ammonia wat...

Embodiment 3

[0043] Pretreatment of positive electrode waste lead sludge: mix the positive electrode waste lead sludge of lead-acid battery with pure water at a mass ratio of 1:1.2, place in a stirring device and stir for 13 minutes, and after standing for 17 minutes, remove the upper layer of liquid, and use a plate for the lower layer of material The frame filter press is used for solid-liquid separation, and the filtrate can be recycled. The filter cake is added to the mixture of ammonium sulfate and ammonia water at a mass ratio of 2:1.1. The temperature of the reaction vessel is raised to 40°C, and the filter cake and the mixed solution are stirred for 1 hour. , and filter until no lead sulfate is leached to obtain ammonium sulfate mixture and pretreated positive electrode waste lead sludge.

[0044] Preparation of 4BS: Put the obtained ammonium sulfate mixture in a still, set the temperature of the still at 0°C after vacuum decompression, and precipitate lead sulfate crystals, and the l...

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Abstract

The invention relates to the field of battery recycling, and discloses a method for preparing red lead by using positive electrode waste lead mud of a lead-acid storage battery. The method of the invention utilizes positive electrode waste lead mud produced in the production process of lead-acid batteries and positive electrode paste recovered from waste lead-acid batteries as raw materials to prepare red lead, the ratio of raw materials is reasonable, the process requirements are simple, and red lead with high purity can be prepared. , the energy consumption is low, and the battery performance of the battery prepared by using the red lead obtained according to this method is basically not lower than that of the new battery. When the red lead is prepared, its by-product can also be used to prepare a battery additive 4BS (4PbO ·PbSO 4 ), this inventive method not only reduces the cost, but also solves the waste in the production and recycling of lead-acid batteries, which is green and environmentally friendly, and is very suitable for industrial production.

Description

technical field [0001] The invention relates to the field of battery recycling, in particular to a method for preparing red lead from positive electrode waste lead mud of lead-acid batteries. Background technique [0002] Red lead is an important raw material for the manufacture of lead-acid batteries, and is widely used in the positive electrode active materials of valve-regulated lead-acid batteries, traction batteries, stationary batteries, electric vehicle lead-acid batteries and submarine batteries. The main functions of red lead in lead-acid batteries are as follows: 1. Shorten the curing time of the raw plate and improve the curing quality of the plate; 2. Shorten the formation time; 3. Increase the initial capacity of the battery. [0003] At present, the electronic grade red lead specially used for batteries is made of electrolytic lead. This process is complicated. After heating and melting the No. 1 lead or No. 2 lead in accordance with GB 469-64, it is made into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/56H01M10/06C01G21/10
CPCC01G21/10H01M4/56H01M10/06H01M10/54Y02E60/10Y02W30/84
Inventor 吴鑫代少振王江林项晨
Owner CHAOWEI POWER CO LTD
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