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A method for recycling waste refractory materials during the preparation of ternary cathode materials

A technology of discarded refractory materials and positive electrode materials, which is applied in the field of solid waste recycling and treatment in the new energy industry, can solve the problems of no comprehensive utilization of discarded saggers and difficulty in recycling, achieve good industrial application prospects, reduce raw material consumption, and raw material costs low effect

Active Publication Date: 2020-12-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the alkali metal reaction on the surface of the waste saggers in the production process of ternary cathode materials, it is difficult to directly return them to use, and there are currently no relevant literature reports on the comprehensive utilization of waste saggers in the new energy industry
There is no relevant report on the treatment of other waste refractory materials in the production process of ternary cathode materials

Method used

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  • A method for recycling waste refractory materials during the preparation of ternary cathode materials
  • A method for recycling waste refractory materials during the preparation of ternary cathode materials

Examples

Experimental program
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Effect test

Embodiment 1

[0118] This embodiment provides a method for recycling waste refractory materials during the preparation of ternary cathode materials. The specific method is as follows:

[0119] (1) Immerse the abandoned sagger described in Table 1 in the leaching tank of 10L sulfuric acid with a molar concentration of 2mol / L for reaction, add 300mL of hydrogen peroxide and carry out normal temperature leaching reaction, take out the sagger after leaching for 10h, and purify the sagger Soak in clean water, soak for 5 hours, rinse with clean water, and then use the sagger for crushing and screening to prepare refractory materials (refractory powder).

[0120] (2) After repeated leaching of 10 discarded saggers, the leaching solution is first separated by filtration, and the filter residue is returned to the leaching tank for deep leaching. After washing, it is discharged as solid waste, and the filtered filtrate is neutralized by adding calcium hydroxide (neutralizing agent) , control the pH e...

Embodiment 2

[0134] This embodiment provides a method for recycling waste refractory materials during the preparation of ternary cathode materials. The specific method is as follows:

[0135] (1) The waste sagger used in Example 1 is immersed in a leaching tank of 20L sulfuric acid with a molar concentration of 3mol / L for reaction, and 800mL of hydrogen peroxide is added for leaching reaction, after leaching for 8h, the sagger is taken out, and the purified sagger The bowl was soaked in clean water, soaked for 4 hours, rinsed with clean water, and the sagger was used for crushing and screening to prepare mullite cordierite composite ceramic raw materials.

[0136] (2) After repeated leaching of 22 discarded saggers, the leaching solution was first separated by filtration, and the filter residue was returned to the leaching tank for deep leaching. After washing, it was discharged as solid waste. The filtered filtrate was neutralized by adding calcium hydroxide, and the pH was controlled at a...

Embodiment 3

[0146] This embodiment provides a method for recycling waste refractory materials during the preparation of ternary cathode materials. The specific method is as follows:

[0147] (1) The waste sagger used in Example 1 is immersed in a leaching tank of 10L sulfuric acid with a molar concentration of 2.5mol / L for reaction, adding 600mL of hydrogen peroxide for leaching reaction, taking out the sagger after leaching for 6h, and purifying The sagger was soaked in clean water, soaked for 4 hours, rinsed with clean water, and then used for crushing and screening to prepare mullite cordierite composite ceramic raw materials.

[0148] (2) After repeated leaching of 20 discarded saggers, the leaching liquid is first separated by filtration, and the filter residue is returned to the leaching tank for deep leaching. After washing, it is discharged as solid waste. The filtered filtrate is neutralized by adding calcium carbonate, and the pH is controlled at an end point of 2.5. , reacted f...

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Abstract

The invention provides a method for recycling a waste refractory material in a preparation process of a ternary positive electrode material. The waste refractory material contains silicon, aluminum and magnesium impurities, and the method comprises the following steps: 1) mixing the waste refractory material, an acid solution and an additive, carrying out a leaching reaction, and then separating to obtain a purified refractory material and a leachate; 2) adjusting the pH value of the leachate to 2-5, and separating to obtain solid slag and a separation solution; 3) adding an aluminum removal agent into the separation solution, crystallizing, and separating to obtain solid slag and aluminum removal liquid; 4) adjusting the pH value of the aluminum removal liquid to be greater than or equalto 9, and separating to obtain a ternary mixture and a coprecipitation separation liquid; 5) adding a magnesium removal agent into the coprecipitation separation liquid, adjusting the pH value to be more than or equal to 12, and separating to obtain solid slag and a magnesium removal liquid, and 6) adding a precipitant into the magnesium removal liquid, and carrying out a reaction and separation to obtain a lithium-containing substance and a lithium precipitation liquid. The method realizes recycling of nickel, cobalt, manganese and lithium in the waste refractory material, purifies the wasterefractory material and facilitates industrial production.

Description

technical field [0001] The invention relates to a method for recycling and treating solid waste in the new energy industry, in particular to a method for recycling and treating waste refractory materials in the preparation process of ternary cathode materials. Background technique [0002] In recent years, with the strong support of national policies and the rapid advancement of the current energy and information industries, the new energy industry represented by electric vehicles has developed rapidly, and the lithium battery industry has also developed rapidly, which will greatly drive the upstream and downstream industries. of rapid development. [0003] As an important battery cathode material, the ternary nickel-cobalt-manganese cathode material is widely used in the field of new energy, and due to the upgrading of cathode material research and development, the ternary cathode material has the advantages of high energy density and low cost, and is gradually becoming the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 孙振华李少鹏李会泉
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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