Sodium salt added roasting method of metal in recycled waste lithium battery cathode powder

A waste lithium battery and positive electrode technology, which is applied in the field of sodium salt roasting of metals in the positive electrode powder of recycled waste lithium batteries, can solve the problems of low doping metal content, poor recovery value, low leaching rate, etc.

Active Publication Date: 2018-01-16
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent Publication No. CN102368555A, Chinese Patent Publication No. CN103000896A, Chinese Patent Publication No. CN103531795A, Chinese Patent Publication No. CN105206799A, Chinese Patent Publication No. CN105870402A etc. have disclosed various preparation methods of doped metals for lithium battery cathode materials. The recovery and reuse of metals are rarely covered in domestic and foreign patents or literature
Chinese Patent Publication No. CN102162034A, Chinese Patent Pu

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  • Sodium salt added roasting method of metal in recycled waste lithium battery cathode powder
  • Sodium salt added roasting method of metal in recycled waste lithium battery cathode powder
  • Sodium salt added roasting method of metal in recycled waste lithium battery cathode powder

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Embodiment 1

[0022] A sodium salt roasting method for recycling metals in the positive electrode powder of waste lithium batteries, comprising the steps of:

[0023] S1. Add waste lithium battery positive electrode powder and sodium salt mixture to the mixer to obtain the mixture;

[0024] S2. Send the mixed material obtained in S1 into the ball of the hydraulic pressure ball mechanism to obtain the material ball;

[0025] S3. Roasting, crushing, grinding, and acid leaching the material balls obtained in S2 to obtain an acid leaching solution.

Embodiment 2

[0027] A sodium salt roasting method for recycling metals in the positive electrode powder of waste lithium batteries, comprising the steps of:

[0028] S1. Add waste lithium battery positive electrode powder and NaCl mixture to the mixer; the weight ratio of waste lithium battery positive electrode powder to sodium chloride is 1:0.1, the rotation speed of the mixer is 100r / min, and the revolution speed 5r / min, mixing time is 0.5h;

[0029] S2. Send the mixed material obtained in S1 into a hydraulic pressure ball machine ball to obtain a material ball; wherein the ball making pressure is 0.4MPa, and the material ball radius R=10mm;

[0030] S3. Roast the material balls obtained in S2. The roasting temperature is 850°C, the roasting time is 2h, then crushed, ground, and pickled with hydrochloric acid. The concentration of hydrochloric acid is 0.3mol / L, the solid-to-liquid ratio is 1:2, and the leaching time is 1h, the leaching temperature is 80°C, and the acid leaching solutio...

Embodiment 3

[0032] A sodium salt roasting method for recycling metals in the positive electrode powder of waste lithium batteries, comprising the steps of:

[0033] S1. Add waste lithium battery positive electrode powder and NaCl mixture to the mixer; the weight ratio of waste lithium battery positive electrode powder to sodium chloride is 1:0.2, the rotation speed of the mixer is 80r / min, and the revolution speed 1r / min, mixing time is 2h;

[0034] S2. Send the mixed material obtained in S1 into the ball of the hydraulic pressure ball mechanism to obtain the material ball; wherein the ball making pressure is 0.2MPa, and the material ball radius R=30mm;

[0035] S3. Roast the material balls obtained in S2. The roasting temperature is 650°C, the roasting time is 4h, then crushed, ground, and pickled with hydrochloric acid. The concentration of hydrochloric acid is 0.1mol / L, the solid-to-liquid ratio is 1:4, and the leaching time is 2h, the leaching temperature is 60°C, and the acid leachi...

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Abstract

The invention discloses a sodium salt added roasting method of metal in recycled waste lithium battery cathode powder. The method comprises steps as follows: a waste lithium battery cathode powder andsodium salt mixture is added to a mixing machine, and a mixed material is obtained; the mixed material is sent into a hydraulic ball press for ball preparation, and material balls are obtained; the material balls are roasted, crushed, ground and subjected to acid leaching treatment, and an acid leaching solution is obtained. The method capable of effectively damaging the lattice structure of a cathode material, improving the leaching activity of target metals and reducing the acid amount in the following acid leaching procedure is provided, so that the production condition is optimized, the recovery rate of main metals such as lithium, nickel, cobalt, manganese and the like and the conversion rate of doped metals such as titanium, chromium, zirconium, yttrium, indium, tin, molybdenum, vanadium and the like are increased, and the production efficiency of the roasting and leaching sections is finally improved. Besides, resourceful utilization of the main metals and the doped metals in the waste lithium battery cathode powder is realized.

Description

technical field [0001] The invention relates to the technical field of positive electrode powders of waste lithium batteries, in particular to a sodium salt roasting method for recovering metals in positive electrode powders of waste lithium batteries. Background technique [0002] Lithium-ion batteries have been widely used in portable electrical appliances such as mobile phones, notebook computers, and cameras because of their low environmental pollution, no memory effect, and excellent electrochemical performance. They are also one of the power batteries for electric vehicles. The service life of rechargeable and dischargeable lithium-ion batteries as green energy is generally 3-8 years. With the rapid development of the application of lithium batteries, waste lithium-ion batteries have become an important part of solid waste that cannot be ignored. There are many types of lithium-ion batteries, which can generally be classified according to their positive electrode mater...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02
CPCY02P10/20Y02W30/84
Inventor 徐懋王德钊张鹏郑浩张宏立
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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