Method for recycling lithium, nickel, cobalt and manganese from waste ternary anode material

A cathode material and recycling method technology, applied in the field of solid waste recycling, can solve the problems of many and complex separation and purification procedures, high cost of reducing agent, low valence metal concentration, etc., and achieve efficient and harmless utilization, good sphericity, and uniform particle size. Effect

Inactive Publication Date: 2018-02-06
HUNAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above-mentioned patent improves the leaching efficiency by adding hydrogen peroxide as a reducing agent, and then separates lithium-nickel-cobalt-manganese through chemical precipitation and solvent extraction; the process is complicated, the cost of

Method used

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  • Method for recycling lithium, nickel, cobalt and manganese from waste ternary anode material
  • Method for recycling lithium, nickel, cobalt and manganese from waste ternary anode material
  • Method for recycling lithium, nickel, cobalt and manganese from waste ternary anode material

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Embodiment 1

[0046] Process flow chart of the present invention is attached figure 1 shown.

[0047]In this embodiment, a method for recovering lithium, nickel, cobalt, and manganese from waste ternary positive electrode materials comprises the following steps:

[0048] S1. Ball milling and mixing: mill the waste ternary cathode material and coke accounting for 10% of the mass of the waste ternary cathode material in a planetary ball mill at a speed of 200 rpm for 1 hour;

[0049] S2. Reduction roasting: the mixture of the waste ternary cathode material and coke after ball milling is roasted in 99.99% argon atmosphere, the roasting temperature is 600°C, and the roasting time is 2h;

[0050] S3. Water dissolution: add the cooled roasted product into water to dissolve, the dissolution temperature is 30°C, the dissolution time is 4h, the liquid-solid ratio is 100ml / g, and the stirring intensity is 100rpm. After the reaction is completed, the slurry is filtered to obtain the filtrate and Fil...

Embodiment 2

[0055] Experimental raw material, step are with embodiment 1.

[0056] In this embodiment, a method for recovering lithium, nickel, cobalt, and manganese from waste ternary positive electrode materials comprises the following steps:

[0057] S1. Ball milling and mixing: mill the waste ternary cathode material and coke accounting for 5% of the mass of the waste ternary cathode material in a planetary ball mill at a speed of 100rpm for 2h;

[0058] S2. Reduction roasting: the mixture of the ball milled waste ternary cathode material and coke is roasted in 99.99% argon atmosphere, the roasting temperature is 500°C, and the roasting time is 0.5h;

[0059] S3. Water dissolution: add the cooled roasted product into water to dissolve, the dissolution temperature is 25°C, the dissolution time is 2h, the liquid-solid ratio is 50ml / g, and the stirring intensity is 200rpm. After the reaction is completed, the slurry is filtered to obtain the filtrate and Filter residue, sampling analysi...

Embodiment 3

[0064] Experimental raw material, step are with embodiment 1.

[0065] In this embodiment, a method for recovering lithium, nickel, cobalt, and manganese from waste ternary positive electrode materials comprises the following steps:

[0066] S1. Ball mill mixing: mill the waste ternary cathode material and coke accounting for 20% of the mass of the waste ternary cathode material in a planetary ball mill at a speed of 300rpm for 0.5h;

[0067] S2. Reduction roasting: the mixture of the ball milled waste ternary cathode material and coke is roasted in 99.99% argon atmosphere, the roasting temperature is 700°C, and the roasting time is 3h;

[0068] S3. Water dissolution: add the cooled roasted product into water to dissolve, the dissolution temperature is 28°C, the dissolution time is 5h, the liquid-solid ratio is 60ml / g, and the stirring intensity is 500rpm. After the reaction is completed, the slurry is filtered to obtain the filtrate and Filter residue, sampling analysis dete...

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Abstract

The invention discloses a method for recycling lithium, nickel, cobalt and manganese from a waste ternary anode material. The method comprises the steps of with the waste ternary anode material as theraw material, adding a carbon reducing agent, carrying out mixing and dosing, carrying out roasting reduction at 500-700 DEG C in a protective atmosphere, adding the roasted product into water, carrying out water-soluble reaction, after the reaction is finished, filtering to obtain lithium carbonate filtrate and a filter residue I, carrying out sulfuric acid leaching on the filter residue I so asto obtain a filtrate containing nickel, cobalt and manganese and a filter residue II, adding sulfate so as to adjust the proportion of nickel, cobalt to manganese in the filtrate containing nickel, cobalt and manganese, carrying out precipitation reaction on the filtrate containing nickel, cobalt and manganese, a sodium hydroxide solution and an ammonia water solution in the protective atmosphere, controlling the reaction temperature at 50-70 DEG C and the pH value at 10-11, obtaining ternary precursor slurry after the precipitation reaction, filtering, washing, and drying, so as to obtain the ternary precursor. The method has the beneficial effects that the separation condition of lithium carbonate is simple, the costs of leaching processes of nickel, cobalt and manganese and the regeneration process of the ternary material precursor are low, and the recycling rate is high.

Description

technical field [0001] The invention belongs to the field of solid waste recovery, and relates to a method for recovering lithium, nickel, cobalt and manganese in the positive electrode material of a waste ternary lithium ion battery. Background technique [0002] Lithium-ion batteries are favored by the market and consumers for their high energy density, long cycle life, and environmental friendliness. Currently, the cheap and safe ternary material LiNi x co y mn z o 2 It is a commercial cathode material widely used in the market. It is mainly used in portable electronic devices such as laptops and cameras and electric vehicles. Since the promotion of new energy vehicles in 2009, its number has exploded. In 2016, the production of new energy vehicles in my country More than 507,000 vehicles, and the service life of power batteries is generally 3 years, so a large number of lithium-ion batteries will be scrapped this year and next. It is estimated that by 2020, the scrapp...

Claims

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Application Information

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IPC IPC(8): H01M10/54C22B23/00C22B47/00C22B26/12C22B7/00
CPCC22B7/00C22B23/00C22B26/12C22B47/00H01M10/54Y02P10/20Y02W30/84
Inventor 肖利刘鹏程陈晗
Owner HUNAN UNIV OF TECH
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