China Minmetals Lithium Battery Project: Fully Automatic Microporous Filter

Project Background:

As a global leader in the metals, mining, and new energy materials sectors, China Minmetals Corporation is comprehensively expanding its high- specific- energy lithium battery cathode materials projects (such as battery- grade lithium carbonate, lithium hydroxide, and ternary precursors). In the mother liquor treatment and washing processes of material synthesis, the precision of solid- liquid separation directly determines the purity and electrochemical performance of the final battery materials. Consequently, the client urgently needed to introduce highly efficient and intelligent precision filtration equipment.

Core Challenges:

Extremely Strict Purity Requirements: Battery- grade materials have zero tolerance for trace impurities, requiring the equipment to completely intercept micron and sub- micron ultra- fine suspended particles.
Filter Clogging Dilemma: Lithium battery slurries are often viscous, and ultra- fine powders easily penetrate and clog traditional filter cloths, leading to a sharp decline in filtration efficiency.
Continuous Mass Production Needs: Facing a large- scale production line of tens of thousands of tons, traditional manual cleaning of filter elements is not only inefficient but also prone to introducing secondary contamination.

Our Solution:

Tailored to the specific properties of lithium battery materials, we customized a Fully Automatic Microporous Filter system for the Minmetals project:
Specialized Polymeric Microporous Tubes: Utilized specially sintered PE/PTFE microporous filter tubes with an asymmetrical structure. With filtration precision up to 0.1 microns, it achieves absolute interception of ultra- fine particles.
Fully Enclosed Automated Operation: The equipment operates entirely in a closed system, managed by centralized PLC control. It automatically completes the entire cycle of feeding, filtering, washing, pressing, and pneumatic back- pulse cake discharge, achieving unattended operation.
High- Efficiency Pulse Back- Flushing Technology: An original gas pulse back- flushing cleaning system releases high- pressure gas instantly to rapidly dislodge the filter cake. The regeneration rate of the filter tubes exceeds 95% , completely solving the clogging pain point.

Customer Value & Results:

Since the successful delivery and integration into continuous production, this batch of fully automatic microporous filters has helped Minmetals achieve a win- win situation of "High- Purity Refining" and "Low- Cost Operation." The impurity content of the produced lithium battery materials is far below industry standards, ensuring premium quality. Simultaneously, fully automated operations reduced single- line labor costs by 80% and extended the lifespan of filter media by three times. The successful application of this equipment provides robust hardware assurance for the large- scale manufacturing of high- end EV battery materials in China.