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Comprehensive recycling method of waste and old lithium-ion battery

A technology of lithium-ion batteries and recycling methods, which is applied in the field of comprehensive recycling of waste lithium-ion batteries, can solve problems such as unsuitable processing of waste batteries, and achieve the effects of solving recycling safety problems, high economic benefits, and reducing pollution

Active Publication Date: 2013-09-25
XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for the recycling of waste batteries, there are mainly two methods of recycling waste batteries in China: fire method and wet method, mainly for zinc-manganese batteries, nickel-hydrogen batteries, nickel-cadmium batteries, etc. With the change of the type and type of positive electrode materials, the original treatment The process of waste batteries is relatively inapplicable, and it is urgent to develop a recycling process that can deal with waste ion batteries

Method used

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  • Comprehensive recycling method of waste and old lithium-ion battery

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Effect test

Embodiment 1

[0026] Composite waste lithium-ion batteries are crushed by the combination of explosion-proof magnetic crushing method and atomization spray crushing technology, then enter the constant temperature resistance furnace for heat treatment, control the negative pressure -2000Pa, roasting time is 4h, and use high-speed centrifugal crusher after cooling For crushing and classification, control the speed of the centrifugal crusher to 3200rpm, add 3mol / L sulfuric acid solution to the cobalt-nickel waste after separation, and add sodium sulfite at the same time. After leaching 15h, solid-liquid separation obtains cobalt-containing nickel solution (3.0mol / LH 2 SO 4 The relationship between metal leaching rate and metal leaching rate is shown in figure 1 ), add sodium carbonate to adjust the pH to 4.0, then add sodium fluoride to carry out preliminary impurity removal Ca, Mg, control Ca, Mg≤10ppm, after the impurity removal cobalt nickel solution is extracted by P204, adopt P507 extrac...

Embodiment 2

[0028] Composite waste batteries are crushed by the combination of explosion-proof magnetic crushing method and atomization spray crushing technology, then enter the constant temperature resistance furnace for heat treatment, control the negative pressure -3000Pa, roasting time is 3h, and use high-speed centrifugal crusher for crushing and classification after cooling , control the rotational speed of the centrifugal crusher at 4200rpm, add 2mol / L sulfuric acid solution to the cobalt-nickel waste after separation, and add sodium sulfite at the same time. After solid-liquid separation obtains cobalt-containing nickel solution, (2.0mol / LH 2 SO 4 The relationship between metal leaching rate and metal leaching rate is shown in figure 1 ), add sodium bicarbonate to adjust the pH to 4.5, then add sodium fluoride to carry out preliminary impurity removal Ca, Mg, control Ca, Mg≤10ppm, after the impurity removal cobalt nickel solution is extracted by P204, the cobalt nickel is separat...

Embodiment 3

[0030] Composite waste batteries are crushed by the combination of explosion-proof magnetic crushing method and atomization spray crushing technology, then enter the constant temperature resistance furnace for heat treatment, control the negative pressure -4000Pa, roasting time is 3h, and use high-speed centrifugal crusher for crushing and classification after cooling , control the rotational speed of the centrifugal crusher to 2800rpm, add the cobalt-nickel waste to the ternary composite waste battery after separation, add 4mol / L sulfuric acid solution, and add sodium sulfite at the same time, the amount of sulfurous acid used is 1.8 times the theoretical amount, and the leaching temperature is controlled by steam heating at 90°C, solid-liquid separation after leaching for 10 hours to obtain a cobalt-nickel solution (4.0mol / LH 2 SO 4 The relationship between metal leaching rate and metal leaching rate is shown in figure 1 ), add calcium carbonate to adjust the pH to 3.5, the...

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Abstract

The invention provides a comprehensive recycling method of a waste and old lithium-ion battery, and relates to the lithium-ion battery. The method comprises the following steps of: performing explosion-proof magnetic smashing and atomized spraying smashing on the waste and old lithium-ion battery, thereby separating an outer shell and a battery material; carbonizing and roasting in a constant-temperature roaster at high temperature and under negative pressure, thereby removing an isolated membrane and a cathode; recycling the outer shell and an anode material in a grading manner by using a centrifugal disintegrator, thereby separating the outer shell and the anode material containing nickel and cobalt; leaching out by adding sodium sulfite into H2SO4 at the normal pressure by utilizing the characteristics of the anode material; regulating the pH value by adding carbonate into an leaching liquid; preliminarily removing Ca and Mg by adding a fluoride salt; extracting and removing impurities by using P2O4, thereby removing the impurities such as Fe, Cu, Zn, Ca, Mg and the like; performing selective extraction for cobalt-nickel separation by using P507, thereby obtaining a high-purity nickel sulfate solution and a high-purity cobalt sulfate solution in which the content of the Fe, the Cu, the Zn, the Ca and the Mg is respectively less than or equal to 2.0mg / L. The method is efficient, simple and convenient and low in production cost, and has wide applicability and a high additional value.

Description

technical field [0001] The invention relates to lithium ion batteries, in particular to a comprehensive recovery method for waste lithium ion batteries. Background technique [0002] With the expansion of the application field of lithium-ion batteries, the continuous increase in production capacity, and the increasing number of waste lithium-ion batteries, the effective and rational use of resources and environmental governance are imminent. From the perspective of my country's energy strategy and security, the development of electric vehicles has been listed in the "Eleventh Five-Year" period related industrialization plans. The expansion of battery production capacity has led to increasingly severe resource shortages and environmental problems. Therefore, it is urgent to recycle, regenerate and recycle waste batteries. At the same time, waste batteries cause severe metal environmental pollution and comprehensive pollution control and waste recycling have been listed as ke...

Claims

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Application Information

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IPC IPC(8): H01M10/54C22B7/00C22B3/08C22B3/38
CPCY02P10/20Y02W30/84
Inventor 马跃飞宋阜钱文连刘会明孟笑陈少辉
Owner XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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