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Comprehensive treatment method of waste refractory materials in ternary anode material preparation process

A technology for waste refractory materials and cathode materials, which is applied in the field of comprehensive treatment of waste refractory materials in the preparation process of ternary cathode materials, can solve problems such as difficulty in recycling and use, and achieves reduction of raw material consumption, good industrial application prospects, and low raw material costs. Effect

Active Publication Date: 2019-06-21
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the alkali metal reaction on the surface of refractory materials in the production process of nickel-cobalt lithium manganese oxide cathode materials, it is difficult to directly recycle them. At present, there are no relevant literature reports on the comprehensive utilization of waste refractory materials in the new energy industry.

Method used

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  • Comprehensive treatment method of waste refractory materials in ternary anode material preparation process
  • Comprehensive treatment method of waste refractory materials in ternary anode material preparation process
  • Comprehensive treatment method of waste refractory materials in ternary anode material preparation process

Examples

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Effect test

Embodiment 1

[0158] This embodiment provides a comprehensive treatment method for waste refractory materials during the preparation of ternary cathode materials. The specific method is as follows:

[0159] (1) Immerse the waste sagger (ternary waste refractory material) described in Table 1 in a leaching tank of 10L sulfuric acid with a molar concentration of 2mol / L for reaction, add 100mL of hydrogen peroxide (additive) to carry out leaching reaction at normal temperature, and leaching for 10h Finally, the sagger was taken out, and the purified sagger was put into clear water for soaking. After soaking for 5 hours, the sagger was rinsed with clear water, and the sagger was used for crushing and screening to prepare refractory powder.

[0160] (2) After repeated leaching of 20 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 fi...

Embodiment 2

[0174] This embodiment provides a comprehensive treatment method for waste refractory materials during the preparation of ternary cathode materials. The specific method is as follows:

[0175] (1) Immerse the waste sagger used in Example 1 into a leaching tank of 10L sulfuric acid with a molar concentration of 3mol / L for reaction, add 600mL of hydrogen peroxide and carry out leaching reaction at 25°C, take out the sagger after leaching for 10h, and purify the sagger The bowl is soaked in clean water, soaked for 6 hours, rinsed with clean water, and then the sagger is used for crushing and screening to prepare refractory powder.

[0176] (2) After repeated leaching of 25 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 slowly added to calcium oxide for neutralization, and the pH was controlled at an end ...

Embodiment 3

[0186] This embodiment provides a comprehensive treatment method for waste refractory materials during the preparation of ternary cathode materials. The specific method is as follows:

[0187] (1) Immerse the waste sagger (ternary waste refractory material) used in Example 1 into a leaching tank of 10L sulfuric acid (obtained through acid compounding) with a molar concentration of 2.5mol / L for reaction, and add 500mL of hydrogen peroxide (additive) Carry out leaching reaction at room temperature, take out the sagger after leaching for 10 hours, soak the purified sagger in clean water, rinse with clean water after soaking for 6 hours, and use the sagger for crushing and screening to prepare purified refractory powder.

[0188] (2) After repeated leaching of 15 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, and the filtered filt...

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Abstract

The invention provides a comprehensive treatment method for waste refractory materials in the ternary anode material preparation process. The waste refractory material comprises silicon, aluminum andmagnesium impurities, and the method comprises the following steps that 1) the waste refractory material, the acid and the additive are mixed, leaching reaction and then separation process are carriedout to obtain a purified refractory material and a leachate; 2), the pH value of the leachate is adjusted to be 2-4, and solid-liquid separation is carried out to obtain solid slag and a separation solution; 3) the pH value of the separation liquid is adjusted to be 4.5-5.5, and solid-liquid separation is carried out to obtain solid slag and an aluminum removal solution; 4) the pH value of the aluminum removal solution is adjusted to be more than or equal to 9, and solid-liquid separation is carried out to obtain a ternary mixture and a co-precipitation separation solution; 5) magnesium is removed, specifically, the pH value of the co-precipitation separation solution is adjusted to be more than or equal to 11, and solid-liquid separation is carried out to obtain solid slag and a magnesium removal solution; and 6) lithium is precipitated, specifically, a precipitant is added into the magnesium removal solution, and solid-liquid separation is carried out to obtain a lithium-containingsubstance and a lithium precipitation solution. According to the method, recycling of nickel, cobalt, manganese and lithium in the waste refractory material is realized, the waste refractory materialis purified, and the industrial production is facilitated.

Description

technical field [0001] The invention relates to a method for recycling solid waste from the new energy industry, in particular to a comprehensive treatment method for waste refractory materials in the preparation process of ternary positive electrode 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, 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 demand and output of ternary cathode materials are increasing year by year. In the firing process of ternary nic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/12C22B23/00C22B47/00
CPCY02P10/20
Inventor 孙振华李少鹏李会泉高奥雷
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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