Method for efficiently leaching nickel in wet treatment tailings of waste power battery positive electrode material
By using a bioleaching technology involving mixed bacterial solutions and microwave radiation, the problem of low nickel slag recovery efficiency in wet processing has been solved, achieving efficient nickel recovery and low-cost processing.
CN121344376APending Publication Date: 2026-01-16NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA +1
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Patent Information
- Application Number
- CN202511358951.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-01-16
AI Technical Summary
Technical Problem
Existing wet processing techniques cannot fully recover nickel from the tailings of retired power batteries, resulting in resource waste and environmental risks, and are also costly and inefficient.
Method used
A mixed bacterial solution of *Thiobacillus ferrooxidans*, *Leptospira ferrooxidans*, *Thiobacillus thiooxidans*, *Thiobacillus thiooxidans*, and *Thiobacillus thiooxidans* was used, combined with a modified culture medium and microwave radiation treatment, to efficiently recover nickel from tailings through bioleaching technology.
Benefits of technology
This method achieves efficient recovery of nickel from nickel slag, reduces nickel resource waste and environmental pollution risks, and has low processing costs.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a method for efficiently leaching nickel in waste power battery positive electrode material wet treatment tailings, which comprises the following steps: collecting the tailings generated by waste power battery positive electrode material wet treatment, and pretreating the tailings to obtain nickel slag; and the mixed bacterial liquid is put into an improved culture medium to form a leaching system, the pH value of the leaching system is adjusted to 1.8-2.2, the temperature of the leaching system is adjusted to 40-45 DEG C, then the nickel slag is added for leaching treatment, and a nickel-rich solution and leaching slag with the nickel content smaller than or equal to 0.1% are obtained through leaching. According to the method, the nickel slag is efficiently leached by using the mixed bacterial liquid compounded by thiobacillus ferrooxidans, leptospirillum ferriphilum, thiobacillus thiooxidans, thiobacillus caldus and temperature-resistant thiobacillus oxydans, nickel can be fully recycled, and the problems of waste of nickel resources and potential environmental pollution of nickel slag treatment are avoided.
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