Method for preparing refractory material from waste battery residues, and use of refractory material

Patent metadata

Field	Value
Publication number	US-12027682-B2
Application number	US-202218260032-A
Country	US
Kind code	B2
Filing date	Aug 11, 2022
Priority date	Nov 17, 2021
Publication date	Jul 2, 2024
Grant date	Jul 2, 2024

Abstract

A method for preparing a refractory material from waste battery residues. The method comprises the following steps: (1) disassembling waste batteries, then sorting same to obtain positive and negative electrode powders, leaching the positive and negative electrode powders with an acid, filtering same to obtain a graphite slag, and then subjecting the filtrate to copper removal, followed by the addition of an alkali for a precipitation reaction, wherein the resulting precipitate is an iron-aluminum slag; (2) wrapping the graphite slag obtained in step (1) with wet clay to form an inner core material, then mixing wet clay with the iron-aluminum slag, wrapping the inner core material with same, and aging the wrapped inner core material to obtain a blank; (3) pre-sintering, calcining and cooling the blank prepared in step (2) to obtain a fired product; and (4) washing and drying the fired product to obtain the refractory material.

First claim

The invention claimed is:

1. A method for preparing a refractory material with waste battery residues, comprising the steps of:
(1) dismantling a waste battery and sorting to obtain positive and negative electrode powders, performing acid leaching on the positive and negative powders, filtering the positive and negative powders after performing acid leaching to obtain a filtrate and a graphite slag, then removing copper from the filtrate, and adding an alkali into a resulting filtrate after removing copper for a precipitation reaction to obtain an iron-aluminum slag;
(2) wrapping the graphite slag obtained in step (1) with wet clay to form an inner core material, mixing the wet clay with the iron-aluminum slag, and then wrapping the inner core material with a resulting mixture of the wet clay and the iron-aluminum slag, and aging to obtain a blank;
(3) pre-sintering, calcining and cooling the blank prepared in step (2) to obtain a sintered product; and
(4) washing and drying the sintered product to obtain the refractory material;
wherein the wet clay in step (2) is prepared by mixing clay with a potassium carbonate solution; and the aging is performed at a temperature of 25° ° C. to 35° C., and lasts for 12 hours to 36 hours;
wherein in step (3), the pre-sintering is performed at a temperature of 300° ° C. to 500° C., and lasts for 1 hour to 3 hours; and the calcining is performed at a temperature of 900° C. to 1,100° C. and lasts for 1 hour to 3 hours, and a heating rate from pre-sintering to calcining is 3° C./min to 10° C./min.

2. The method for preparing the refractory material with waste battery residues according to claim 1 , wherein a mass ratio of the clay to the potassium carbonate solution in the wet clay is 55:45 to 79:21.

3. The method for preparing the refractory material with waste battery residues according to claim 2 , wherein the potassium carbonate solution is prepared by potassium carbonate and water, wherein a mass ratio of the potassium carbonate to the water is 1:40 to 5:20.

4. The method for preparing the refractory material with waste battery residues according to claim 1 , wherein in step (2), a mass ratio of the iron-aluminum slag to the graphite slag and the wet clay is 5:4:1 to 7:2:1.

5. A refractory material, wherein the refractory material is prepared by the method according to claim 1 .

6. A refractory material, wherein the refractory material is prepared by the method according to claim 2 .

7. A refractory material, wherein the refractory material is prepared by the method according to claim 3 .

8. A refractory material, wherein the refractory material is prepared by the method according to claim 4 .

Assignees

• Guangdong Brunp Recycling Technology Co Ltd
• Hunan Brunp Recycling Tech Co Ltd
• Hunan Brunp Ev Recycling Co Ltd

Inventors

• Yu Haijun
• Chen Jiangdong
• Xie Yinghao
• Xu Jialei
• Wu Benben
• Li Changdong

Classifications

• C04B2235/349

  Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite · CPC title

• C04B2235/6562

  Heating rate · CPC title

• C04B2235/442

  Carbonates · CPC title

• C04B2235/425

  Graphite · CPC title

• C04B2235/6567

  Treatment time · CPC title