Continuous leaching system for anode powder of waste lithium batteries and leaching technology

A technology for waste lithium battery and positive electrode is applied in the field of continuous leaching system and leaching process of waste lithium battery positive electrode powder. The effect of excessive, increased production efficiency, and reduced equipment

Inactive Publication Date: 2019-01-18
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, subsequent processes such as separation, impurity removal, and purification need to adjust the pH of the solution. Therefore, excessive sulfuric acid will consume a large amount of sodium hydroxide, and will also introduce a large amount of sodium sulfate into the system at the same time, resulting in a reduction in product purity. It has formed a contradiction with the purpose of battery recycling, and none of the existing domestic technologies can solve this problem
At the same time, in the existing wet recovery technology, the leaching process is intermittent leaching. This process has more transfer storage equipment and occupies a certain number of operators, which limits the utilization rate of equipment to a certain extent and reduces production. efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous leaching system for anode powder of waste lithium batteries and leaching technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of waste lithium battery positive electrode powder continuous leaching process that the present invention proposes, comprises the following steps:

[0026] S1, the clean water with 80L h -1 The flow of enters in the mixing tank 3;

[0027] S2. When the clean water starts to flow into the first reaction kettle 1, the heat-treated lithium iron phosphate battery positive electrode powder is charged at 10kg h -1 The speed is transmitted into the first reactor 1, wherein: the first reactor 1 is kept stirring continuously, the temperature is maintained at 85°C, and the residence time of the material is 80-150min;

[0028] S3. Transport the reaction slurry in the first reaction kettle 1 to the first continuous solid-liquid separator 4 through the first pipeline, and transport the pickling solution separated by the first continuous solid-liquid separator 4 through the fourth pipeline To the pickling solution storage tank 7, the solid obtained from the separation is tra...

Embodiment 2

[0035] A kind of waste lithium battery positive electrode powder continuous leaching process that the present invention proposes, comprises the following steps:

[0036] S1. Put the clean water in L·h -1 The flow of enters in the mixing tank 3;

[0037] S2. When the clean water starts to flow into the first reaction kettle 1, heat-treated 622 ternary battery positive electrode powder at 5 kg h -1 The speed is transmitted into the first reactor 1, wherein: the first reactor 1 is kept stirring continuously, the temperature is maintained at 85°C, and the residence time of the material is 80-150min;

[0038] S3. Transport the reaction slurry in the first reaction kettle 1 to the first continuous solid-liquid separator 4 through the first pipeline, and transport the pickling solution separated by the first continuous solid-liquid separator 4 through the fourth pipeline To the pickling solution storage tank 7, the solid obtained from the separation is transported to the second con...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a continuous leaching system for anode powder of waste lithium batteries. The continuous leaching system comprises a first reaction kettle, a second reaction kettle, a stirringtank, a first continuous solid-liquid separator, a second continuous solid-liquid separator, a third continuous solid-liquid separator, a pickle liquor storage tank and a waste residue storage tank; the first reaction kettle is connected with the first continuous solid-liquid separator through a first pipeline; the second reaction kettle is connected with the second continuous solid-liquid separator through a second pipeline; the stirring tank is connected with the third continuous solid-liquid separator through a third pipeline; the first continuous solid-liquid separator is connected with the pickle liquor storage tank through a fourth pipeline and is connected with the second reaction kettle through a fifth pipeline; the second continuous solid-liquid separator is connected with the first reaction kettle through a sixth pipeline and is connected with the stirring tank through a seventh pipeline; the third continuous solid-liquid separator is connected with the second reaction kettlethrough an eighth pipeline and is connected with the waste residue storage tank through a ninth pipeline. The continuous leaching system is high in leaching rate and is capable of solving the problemof excessive dosage of sulfuric acid.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium batteries, in particular to a continuous leaching system and leaching process for positive electrode powder of waste lithium batteries. Background technique [0002] With the rapid development of the new energy industry, the application range and market size of lithium-ion batteries are increasing year by year. With the increasing scarcity of natural resources such as lithium nickel cobalt, the price of lithium nickel cobalt salt, which is a raw material for batteries, has increased rapidly. Therefore, the lithium-nickel-cobalt resource market based on the recycling of waste lithium-ion batteries will become larger and larger. [0003] At present, in China, the positive electrode powder treatment process in waste lithium batteries is mainly based on wet recovery technology. In the wet process, in order to obtain valuable elements such as nickel, cobalt and lithium in the positive...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/12C22B7/00H01M10/54
CPCC22B7/007C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 郑浩王德钊徐懋张鹏
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products