Method for recycling used lead-acid batteries in full circulation mode

A lead-acid battery, recycling technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of waste of rare metals, incomplete desulfurization, increased energy consumption, etc., to improve recovery rate and avoid equipment Loss and environmental pollution, the effect of easy operation

CN103794834AInactive Publication Date: 2014-05-14襄阳远锐资源工程技术有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-05-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for recycling used lead-acid batteries in a full circulation mode. According to the technical scheme, a band sawing machine for cutting the used lead-acid batteries is used for sawing and cutting a used lead-acid battery into an upper cover, a groove body, an electrode set and acid liquid, and the upper cover, the groove body, the electrode set and the acid liquid are respectively processed to obtain lead-antimony alloy, plastic, lead plaster, lead-calcium alloy and dilute sulphuric acid. Then, the lead plaster is added into a reaction tank, amidogen-contained substances are added to the lead plaster, stirring is conducted, desulfurization is conducted after carbon-contained substances are added, solid-liquid separation is conducted, and therefore desulfurated lead plaster and filter liquid are obtained. Then, the filter liquid is evaporated and crystallized to obtain ammonium sulfate, and liquid evaporated in the evaporation and crystallization process is cooled to the room temperature and recycled. The washed desulfurated lead plaster is dried, and the dried desulfurated lead plaster is roasted at the temperature larger than 400 DEG C and smaller than or equal to 500 DEG C or at the temperature larger than 500 DEG C and smaller than or equal to 650 DEG C to obtain lead tetroxide or lead oxide. The method has the advantages of being simple in process, low in recycling cost, high in recycling rate, high in product purity and environmentally friendly.
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Description

technical field

[0001] The invention belongs to the technical field of waste lead-acid battery treatment. In particular, it relates to a method for full-cycle recovery and treatment of waste lead-acid batteries. Background technique

[0002] Lead-acid battery is the battery with the largest output and the widest usage among all kinds of batteries in the world, and its lead consumption accounts for 82% of the total lead consumption in the world. With the increasing use of lead-acid batteries, the shortage of lead resources and the huge harm caused by a large number of waste lead-acid batteries to the surrounding environment have become problems that need to be solved urgently. Therefore, the centralized recycling of waste lead-acid batteries, the extraction of secondary lead and its oxides, and the realization of full recycling have great economic and social benefits, and also meet the basic requirements of sustainable development strategies.

[0003] At present, the advanc...

Examples

Embodiment 1

[0066] A method for full-cycle recycling and processing waste lead-acid batteries. The specific steps are as figure 1 shown:

[0067] Step 1. Sawing

[0068] Using "a band sawing machine for cutting waste lead-acid batteries", the waste lead-acid batteries to be recycled are first cut into the upper cover part, the tank body part, the pole group part and the acid solution, and then the process is carried out.

[0069] Step 1. First, crush the sawed upper cover to a particle size of 50-100 mm, and then perform hydraulic separation to obtain lead alloy and plastic containing plastic rings; then crush the lead alloy containing plastic rings to a particle size of 15 ~30mm, and then perform hydraulic separation to obtain plastic and lead-antimony alloy.

[0070] Step 2: Crushing the sawed groove body to a particle size of 15-50 mm, and then sieving through a single-layer vibrating screen to obtain lead paste and plastic.

[0071] Step 3: Crushing the sawed pole group to a parti...

Embodiment 2

[0094] A method for full-cycle recycling and processing of waste and old lead-acid batteries, the specific steps of which are as follows: figure 1 shown:

[0095] Step 1 is the same as Step 1 of Embodiment 1.

[0096] Step 2, lead paste treatment

[0097] The lead paste obtained in step 1 is added to the reaction tank, and then the amino-containing substance is added, and the ratio of the amount of the lead sulfate in the lead paste to the amount of the amino-containing substance in the amino-containing substance is 1: (6~10); then add water to adjust the liquid Solid ratio to (5~10): 1, stir at room temperature for 2~5h, finally add carbonaceous material for desulfurization, desulfurization time is 5~10h, solid-liquid separation, obtain desulfurization lead paste and filtrate; desulfurization lead paste and filtrate are obtained; The paste is washed until neutral, and the washed desulfurized lead paste is dried at 80 to 120°C for 1 to 12 hours to obtain dry lead paste.

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