Method for extracting lithium and nickel cobalt from waste lithium ion battery step by step

A lithium-ion battery and lithium extraction technology, which is applied in battery recycling, process efficiency improvement, recycling technology, etc., can solve problems such as the difficulty in completely removing nickel, cobalt, iron, manganese and aluminum impurities, affecting the purity of lithium salt products, and high concentration of sodium ions , achieve the effect of avoiding disposal and environmental problems, shortening the lithium recovery process, and simplifying the recovery process

Active Publication Date: 2020-03-31
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0012] Regardless of direct reduction acid leaching or acid leaching after pretreatment, the lithium in the positive electrode material and the iron, cobalt, manganese, nickel, aluminum and other metals in the positive electrode material are leached at the same time. Purification processes such as nickel, cobalt, copper and manganese, and then carbonate precipitation to recover lithium, resulting in a long lithium recovery process and low recovery rate; and because almost all metals in the positive electrode material are dissolved, resulting in low lithium ion concentration in the leaching solution. A large amount of evaporation and concentration is required to meet the requireme

Method used

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  • Method for extracting lithium and nickel cobalt from waste lithium ion battery step by step
  • Method for extracting lithium and nickel cobalt from waste lithium ion battery step by step
  • Method for extracting lithium and nickel cobalt from waste lithium ion battery step by step

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Effect test

Embodiment 1

[0050] The nickel-manganese-manganese-cobaltate lithium positive electrode material obtained from dismantling, crushing and screening of waste lithium-ion batteries is reduced and roasted with carbon monoxide at 500-1000°C to obtain calcined sand; the calcined sand is added to a dissolution mill, mixed with water and mixed An appropriate amount of calcium chloride is added as a transformation agent, so that the lithium carbonate in the calcined sand is transformed into calcium carbonate, and the lithium is extracted into the solution. The amount of calcium chloride added is 0.8 times the molar number of lithium in the calcine, the amount of water added is 1 to 4 times the mass of the calcine, the temperature for lithium transformation is 20-100°C, and the slurry is separated from solid and liquid , to obtain lithium-containing solution and transformation slag. figure 2 , image 3 , Figure 4 They are the XRD patterns of positive electrode material, calcined sand, and transi...

Embodiment 2

[0052] The lithium cobalt oxide positive electrode material obtained from the dismantling, crushing and screening of waste lithium-ion batteries is reduced and roasted with coke powder at 850°C to obtain calcined sand; the calcined sand is added to the stirring mill, and water and an appropriate amount of milk of lime are added Carry out transformation to extract lithium, the amount of calcium chloride is added according to 0.6 times the molar number of lithium in the calcine, the amount of water is added according to 2 times the mass of calcine, the temperature of transformation and extraction of lithium is 25 ° C, and the slurry is solid-liquid Separate to obtain lithium-containing solution and transformation slag.

Embodiment 3

[0054] The nickel cobalt lithium manganese oxide positive electrode material obtained from dismantling, crushing and screening of waste lithium-ion batteries is reduced and roasted with coal powder at 800°C to obtain calcined sand; add calcined sand to the dissolution mill, and add appropriate amount of water and lime Carry out grinding transformation, the amount of lime added is 0.6 times the molar number of lithium in the calcine, the amount of water is added according to 2 times the mass of the calcine, the temperature for transforming and extracting lithium is 25°C, and the transformed slurry is solidified liquid separation to obtain lithium-containing solution and transformation slag. An appropriate amount of lithium phosphate is added to the obtained lithium-containing solution, stirred and reacted for a period of time, and filtered to obtain a pure lithium solution. Then add an appropriate amount of sodium carbonate solution into the pure lithium solution, stir and filt...

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Abstract

The invention discloses a method for extracting lithium and nickel cobalt from a waste lithium ion battery step by step, and belongs to the technical field of comprehensive recovery of lithium ion battery materials. The method comprises the following steps of splitting, crushing and screening a waste lithium ion battery to obtain a positive electrode material powder, carrying out reduction roasting on the positive electrode material powder with a carbon-containing reducing agent, size mixing the obtained calcine with water, adding a proper amount of calcium chloride or lime milk solution for reaction transformation, selecting lithium carbonate in the calcine to be extracted into the solution, thereby realizing separation with nickel, cobalt, manganese, iron, aluminum and phosphorus. The method can realize the preferential selective extraction of lithium, the obtained lithium solution is high in purity and lithium concentration, the extraction and impurity removal, evaporation and concentration processes are not needed, the recovery of lithium and the product preparation process are simple, the recovery rate is high, the energy consumption is low, and the environmental problem of high-concentration sodium salt wastewater is not present```.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery material recovery, and relates to a step-by-step recovery method for lithium and nickel-cobalt from waste lithium-ion battery materials, in particular to a method for recovering waste lithium-ion battery anode materials with salt substances after reduction roasting Transformational and preferential lithium extraction methods. Background technique [0002] Lithium is the core raw material of lithium-ion batteries. With the rapid growth of the output of new energy materials represented by lithium-ion batteries, the global demand for lithium is also growing rapidly. Lithium ore resources can be divided into two types: ore lithium and brine lithium. It mainly occurs in salt lake brine and granite pegmatite deposits, among which salt lake brine lithium accounts for 66% of the world's lithium reserves and more than 80% of the reserve base, and has become the main source of lithium in the wo...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02C22B26/12C22B23/00
CPCC22B7/006C22B1/02C22B26/12C22B23/043Y02P10/20Y02W30/84
Inventor 蒋训雄张贤赵峰李达
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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