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A method of priority lithium lifting and collaborative manganese from waste lithium -ion batteries

A technology of lithium ion battery and ternary battery is applied in the field of separation and extraction of lithium and synergistic recovery of manganese to achieve the effects of reducing energy consumption, reducing production cost and low roasting temperature

Active Publication Date: 2022-08-09
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to propose a method for preferentially extracting lithium and synergistically recovering manganese from waste lithium-ion batteries, aiming at solving the problems of preferentially extracting lithium and lithium carbonate solubility.

Method used

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  • A method of priority lithium lifting and collaborative manganese from waste lithium -ion batteries
  • A method of priority lithium lifting and collaborative manganese from waste lithium -ion batteries
  • A method of priority lithium lifting and collaborative manganese from waste lithium -ion batteries

Examples

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Effect test

Embodiment 1

[0047] The waste lithium-ion battery used in this embodiment is a nickel-cobalt-manganate lithium-ion battery. Weigh 30 g of black powder, 12 g of anthracite powder, and 5 g of calcium chloride prepared according to the above steps respectively, mix the three well, pour them into a crucible, and place the crucible in a tube furnace. Use a vacuum pump to evacuate the tube furnace, blow in nitrogen, set the roasting temperature to 650°C, and set the holding time to 2h. After roasting, cool down to room temperature; Leaching, the leaching temperature is 60 °C, the leaching time is 1 h, the leaching solution containing lithium is obtained by filtration, and the filter residue is sent to sulfuric acid leaching to recover Ni, Co and part of Mn; a certain amount of H is added to the leaching solution containing lithium. 2 SO 4 , maintain the pH value at about 2, the reaction temperature is 50 °C, the reaction time is 1 h, and the filtration is separated to obtain CaSO 4 By-product;...

Embodiment 2

[0049] The waste lithium ion battery used in this embodiment is a lithium nickelate battery. Weigh 30 g of black powder, 10 g of anthracite powder, and 5 g of calcium chloride prepared according to the above steps, mix the three well, pour them into a crucible, and place the crucible in a tube furnace. Use a vacuum pump to evacuate the tube furnace, blow in nitrogen, set the roasting temperature to 650°C, and set the holding time to 2h. After roasting, cool down to room temperature; Leaching, the leaching temperature is 60 °C, the leaching time is 1 h, the leaching solution containing lithium is obtained by filtration, and the filter residue is sent to sulfuric acid leaching to recover Ni; a certain amount of H is added to the leaching solution containing lithium. 2 SO 4 , maintain the pH value at about 3, the reaction temperature is 50 ° C, the reaction time is 1 h, and the filtration is separated to obtain CaSO 4 The filtrate is sent to the next step; the filtrate is added...

Embodiment 3

[0051] The waste lithium ion battery used in this embodiment is a lithium cobalt oxide battery. Weigh 30 g of black powder, 10 g of anthracite powder, and 5 g of calcium chloride prepared according to the above steps, mix the three well, pour them into a crucible, and place the crucible in a tube furnace. Use a vacuum pump to evacuate the tube furnace, blow in nitrogen, set the roasting temperature to 650°C, and set the holding time to 2h. After roasting, cool down to room temperature; Leaching, the leaching temperature is 60 °C, the leaching time is 1 h, the leaching solution containing lithium is obtained by filtration, and the filter residue is sent to sulfuric acid leaching to recover Co; a certain amount of H is added to the leaching solution containing lithium. 2 SO 4 , maintain the pH value at about 3, the reaction temperature is 50 ° C, the reaction time is 1 h, and the filtration is separated to obtain CaSO 4 The filtrate is sent to the next step; the filtrate is ad...

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Abstract

The invention discloses a method for preferentially extracting lithium from waste lithium ion batteries and synergistically recovering manganese, belonging to the technical field of lithium ion battery recycling. It includes the following steps: step 1): pretreating the waste lithium ion battery to obtain a positive electrode active material; step 2): finely grinding the positive electrode active material and the carbonaceous reducing agent; step 3): weighing the black powder and the carbonaceous reducing agent Add chlorinating agent, fully mix and calcine anaerobic to obtain calcine; step 4): add water to stir and leaching the calcine, and filter to obtain filtrate and filter residue; step 5): add H to the filtrate 2 SO 4 , filtered to get CaSO 4 and filtrate; Step 6): add NaOH to the filtrate, filter to obtain Mn(OH) 2 and filtrate; step 7): add Na to the filtrate 2 CO 3 , filter and dry the filter cake to obtain battery-grade lithium carbonate. In the invention, the transformation of lithium carbonate is carried out in advance in the roasting process, so as to avoid the loss of Li caused by incomplete transformation of lithium carbonate during the water immersion process, and synergistically recover part of Mn.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery recovery, relates to a method for preferentially extracting lithium from lithium-ion batteries and synergistically recovering manganese, and in particular to a method for preferentially separating and extracting manganese from lithium-ion batteries by combining a chlorinating agent and a carbonaceous reducing agent. Lithium and methods for synergistic recovery of manganese. Background technique [0002] As a new type of new energy battery, lithium-ion battery has largely alleviated human dependence on and destruction of natural resources, and the toxicity of the raw materials used is much lower than that of cadmium-nickel batteries and lead-acid batteries. Accepted by the society, it is expected to become the leader of new energy in the future. In addition to low toxicity, lithium batteries also have the advantages of long cycle life, high specific energy, small self-discharge effect,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C01D15/08C01G45/02C01G45/06
CPCC01D15/08C01G45/06C01G45/02H01M10/54Y02W30/84
Inventor 王海北邓超群周起帆郑朝振秦树辰张学东刘三平王玉芳李强苏立峰谢铿
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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