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A crash selection method for thrown lead acid accumulator and special tower gravity selector

A waste lead-acid battery, gravity separation technology, applied in battery recycling, recycling technology, waste collector recycling and other directions, can solve the problems of high operating costs, expensive equipment, high sulfuric acid concentration, to solve corrosion problems, equipment stability Reliable and effective in eliminating environmental pollution

Inactive Publication Date: 2009-07-29
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equipment is characterized by a high level of mechanical automation, but the process is complicated, the equipment is expensive, the investment is large, and the operating cost is high.
However, modern lead-acid batteries adopt the valve-controlled maintenance-free technology of AGM separators. Most of the failed waste batteries dry up, and the acid cannot be poured out, which affects the effect.
[0005] In addition, the above two equipment systems are affected by the highly corrosive lead dioxide and sulfuric acid in the waste batteries during the working process, especially, the modern valve-controlled maintenance-free lead-acid batteries are affected by thermal runaway, resulting in scrapping The acid solution in the battery dries up, and the concentration of sulfuric acid is extremely high, causing serious corrosion to the crushing and sorting equipment

Method used

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  • A crash selection method for thrown lead acid accumulator and special tower gravity selector
  • A crash selection method for thrown lead acid accumulator and special tower gravity selector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The crushing equipment selected impact bed (provided by Zhejiang University of Technology), crocodile crusher (Shanghai Yuanhua Machinery Factory, PE-150×250) and horizontal ball mill (provided by Zhejiang University of Technology), with a processing capacity of 1 ton of waste batteries / h .

[0033] The sorting equipment adopts the tower gravity sorter, the structure see figure 1, the top of the feed chamber 1 is provided with a light material outlet 4, and the bottom of the feed chamber is connected to the slurry circulation chamber 2. A porous vibrating frame 5 is provided, and the porous vibrating frame is connected with the curved roller machine 6; the bottom of the slurry circulation chamber is connected to the A fluid flow uniform distribution plate 7 is arranged at the junction of the heavy material collection tank 3, and the fluid flow uniform distribution plate is composed of an air chamber 8, a screening plate 9 and a gas transition chamber 10, and the air cha...

Embodiment 2

[0038] Used device is the same as embodiment 1, and the flow rate of the pump that conveys liquid at the bottom of the tower is 75m 3 / h, the flow rate of the pump conveying the bypass circulating liquid in the middle of the tower is 35m 3 / h, the bubbling pressure of compressed air is 2.5 atmospheres.

[0039] The actual operation has been carried out in the crushing and sorting equipment mentioned above, and the process is as follows.

[0040] Take 1000kg of waste batteries and put them into a punching machine for primary crushing. The primary crushed materials are then put into a crocodile crusher. While mechanically crushing, inject 15% ammonia water to adjust the pH of the medium to 5-6. After the medium is purified and treated to remove metal ions, it is treated with lime water and converted into dilute ammonia water for recycling.

[0041] After the crushed materials are finely ground step by step by a ball mill, the particle size of the lead-containing paste mud mate...

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Abstract

The invention provides a crushing and sorting method for waste lead-acid batteries and a special tower gravity sorter. The present invention adopts primary crushing by ordinary punching machine, then mechanical crushing by crocodile crusher, fine grinding by ball mill, and finally sorting by special tower gravity separator. The beneficial effects are mainly reflected in: sufficient crushing, material sorting Thorough, fine grinding and controllable particle size; can efficiently decompose waste lead-acid batteries into lightweight materials (AGM fiber, ABS, PP, PVC plastic, epoxy resin scraps, rubber air pressure cap, O-ring) , Heavy materials (lead and lead alloys) and medium materials (paste materials containing Pb, PbO, PbO2, PbSO4); the degree of corrosion of the equipment is small, which solves the common corrosion problems in traditional crushing and sorting equipment; The equipment is stable and reliable, with low investment and low operating costs. By recycling the water medium, it not only saves water resources but also eliminates environmental pollution.

Description

(1) Technical field [0001] The invention relates to a crushing and sorting method for waste lead-acid batteries and a special tower gravity sorter in the sorting process. (2) Background technology [0002] At present, the recycling of waste lead-acid batteries is of great significance. It can not only recycle precious lead resources, but also eliminate the serious pollution of the environment caused by heavy metal ions contained in waste batteries. In order to efficiently recycle waste lead-acid batteries, waste batteries must first be efficiently shredded and sorted. In the field of high-efficiency crushing and sorting equipment for waste batteries, the developed equipment mainly includes the CX crushing and sorting system of Engitec Technologies in Italy and the MA crushing and sorting system developed by MA in the United States. Both technologies have complete sets of equipment. [0003] The method adopted in the CX crushing system of Engitec Technologies in Italy is to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 高云芳董志根
Owner ZHEJIANG UNIV OF TECH
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