Company cases about Slurry Electromagnetic Filter Improves Impurity Removal Efficiency for a Lithium Battery Cathode Material Manufacturer

Slurry Electromagnetic Filter Improves Impurity Removal Efficiency for a Lithium Battery Cathode Material Manufacturer

2026-01-27

Case Study: Slurry Electromagnetic Filter for Lithium Battery Production

The Challenge

A leading lithium battery cathode material manufacturer was facing a critical challenge in its production process: ferromagnetic impurities in the slurry were causing a high rate of product defects and frequent downtime. The company’s previous filtration system relied on disposable filter bags, which could only capture particles ≥2 μm, leading to an iron impurity content of 85 ppb in the final product. Additionally, the filter bags needed to be replaced every 2 hours, reducing the production line’s overall operational efficiency to just 82%.

The TMY Solution

To address these issues, the manufacturer adopted TMY’s Slurry Electromagnetic Filter. The device uses a high-gradient magnetic field to effectively capture ferromagnetic impurities as small as 0.3 μm, achieving an impurity removal rate of over 99%. Its automatic cleaning and slag discharge function eliminates the need for manual filter bag replacement, allowing continuous operation for up to 30 days without interruption.

Tangible Results

After implementing the new filter, the production line’s operational efficiency increased to 96%, while the filtration cost per ton of slurry dropped by 38%. Most importantly, the iron impurity content in the finished product fell to below 10 ppb, significantly improving product quality and ensuring compliance with the strict standards of downstream electric vehicle battery suppliers. This upgrade helped the manufacturer secure long-term contracts with major automotive clients and strengthen its position in the high-end new energy materials market.

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