With the rapid growth of the new energy vehicle (NEV) industry, the recycling and treatment of end-of-life power batteries has become a critical component of resource circularity and environmental protection. The efficient and green recycling of battery black mass (rich in valuable metals such as lithium, cobalt, nickel, and manganese) is a core challenge for the industry's sustainable development.
However, traditional recycling methods often suffer from low efficiency, high pollution, and insufficient recovery rates. Leveraging its independently developed CWL-M Series Centrifugal Extractor, Zhengzhou Tiei Extraction Technology Co., Ltd. provides an efficient, continuous, and green hydrometallurgical solution for battery black mass recycling, helping enterprises reduce costs, improve efficiency, and jointly build a greener future.

Innovative Process Flow of CWL-M Centrifugal Extractor for Battery Black Mass Recycling

The centrifugal extraction solution developed by Tiei Extraction is closely integrated with hydrometallurgical processes, enabling precise separation and enrichment of high-purity metal salts from battery black mass leachate. The core process flow is as follows:

1.Pretreatment and Leaching
After crushing and physical separation, battery black mass undergoes acid leaching (typically sulfuric acid-based systems), converting valuable metals into ionic form and transferring them into solution to produce a complex leachate.

2.Extraction Stage (Core Process)
After filtration and pH adjustment, the leachate enters a multi-stage counter-current extraction system composed of CWL-M centrifugal extractor.
Extraction of cobalt, nickel and manganese: Specific extractants (such as P507, Cyanex 272, etc.) are used to achieve efficient mixing and mass transfer with the leachate inside the centrifugal extractor. Under strong centrifugal force, target metal ions are selectively transferred into the organic phase, enabling rapid separation from impurity elements.
Selective lithium recovery: Based on lithium’s chemical characteristics, dedicated extraction systems or optimized process conditions can be applied to achieve targeted lithium recovery.

3.Scrubbing and Stripping
The metal-loaded organic phase enters the scrubbing stage to remove entrained impurities, followed by the stripping stage. By adjusting the stripping agent (e.g., dilute sulfuric acid), target metal ions (Co²⁺, Ni²⁺, etc.) are efficiently transferred back into the aqueous phase, forming high-concentration, high-purity metal salt solutions. Meanwhile, the organic phase is regenerated and recycled.

4.Downstream Processing
The obtained high-purity metal salt solutions can be directly used for the production of battery-grade precursors (such as cobalt sulfate and nickel sulfate). The regenerated organic phase is returned to the extraction stage, forming a closed-loop circulation system.

This process achieves metal separation and purification, extraction solvent recycling, and minimizes wastewater discharge, making it a clean and efficient recycling path.

Why Choose Tiei Extraction CWL-M Centrifugal Extractor?

Compared with traditional mixer-settlers and other extraction equipment, the CWL-M centrifugal extractor demonstrates disruptive advantages in battery black mass recycling applications:

• 1.Exceptional Efficiency for Significant Cost Reduction and Performance Improvement
• High mass transfer efficiency: High-speed rotation generates intense shear force, creating fine dispersion between the two liquid phases. The enlarged interfacial contact area significantly accelerates mass transfer, enabling single-stage extraction efficiency exceeding 90%.
• Extremely short residence time: Material residence time inside the extractor ranges from only a few seconds to tens of seconds. This dramatically reduces extractant degradation and undesirable side reactions, enhancing overall system stability.
• Continuous and automated operation: Fully enclosed, continuous counter-current operation ensures high throughput capacity. The system integrates seamlessly with upstream and downstream processes, enabling automated production while reducing labor and time costs.

• 2.Outstanding Environmental and Safety Performance
• Closed operation for clean production: The fully enclosed structure effectively eliminates volatile organic compound (VOC) emissions, protects worker health, and complies with stringent environmental regulations.
• Low internal hold-up volume: The minimal liquid inventory inside the machine significantly reduces material loss and operational risk in the event of abnormal conditions.
• Reduced wastewater generation: Efficient phase separation minimizes washing requirements and lowers downstream treatment loads, supporting green manufacturing objectives.

• 3.Superior Economics and Operational Stability
• Reduced extractant consumption: High mass transfer efficiency and rapid phase separation decrease entrainment losses, lowering both initial extractant charge and ongoing replenishment requirements.
• Compact footprint: With a modular design, the unit occupies only a fraction of the space required by traditional equipment for equivalent processing capacity, substantially reducing plant space and capital investment.
• Stable and reliable operation: The precision-engineered structure offers strong anti-clogging capability and adaptability to complex feed compositions, ensuring long-term stable production line performance.

• 4.Flexible Adaptation and Professional Technical Support
• Comprehensive model range: The CWL-M series centrifugal extractor includes multiple capacity specifications, flexibly meeting requirements from laboratory research and pilot-scale testing to large-scale industrial production.
• Professional process development support: Zhengzhou Tiei Extraction is backed by an experienced technical team capable of providing full-process engineering packages—from laboratory testing and pilot validation to industrial implementation—delivering customized, optimized solutions for each client.

Zhengzhou Tiei Extraction Technology Co., Ltd. has been deeply engaged in the field of liquid–liquid extraction for many years and is recognized as a National “Little Giant” Enterprise specializing in precision, innovation, and advanced technologies. Its CWL-M centrifugal extractor has been successfully deployed in numerous battery recycling projects for well-known companies both domestically and internationally, earning widespread recognition for their stable operational performance and significant economic benefits.

Tiei Extraction is not only a manufacturer of high-end equipment, but also a strategic partner in hydrometallurgical process solutions. From process validation and full production line design to installation, commissioning, and continuous optimization, we provide comprehensive lifecycle technical support to ensure long-term project success.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820