Company cases about Air-cooled Dry Powder Electromagnetic Separators Deployed for Artificial Graphite Anode Production Line in Sichuan, Stab

Air-cooled Dry Powder Electromagnetic Separators Deployed for Artificial Graphite Anode Production Line in Sichuan, Stab

2026-07-21

a leading new energy enterprise producing artificial graphite anode in Yibin, Sichuan completed the upgrading of dry purification production lines for graphite powder. Micron-scale weak magnetic iron oxide is generated during graphite crushing and shaping processes. Ordinary permanent magnet grates can only intercept coarse iron scraps, while trace iron impurities mixed into anode powder lead to cycle attenuation and thermal runaway risks of power batteries, failing raw material inspection standards for battery exports to Japan and South Korea.

A two-stage high-precision magnetic separation scheme is adopted for the whole dry production line. Automatic drawer-type permanent magnet grates are installed at the front end to intercept coarse iron falling off grinding equipment, followed by air-cooled high-gradient dry powder electromagnetic separators connected in series. The adjustable gradient strong magnetic system captures ultra-fine weak magnetic impurities of 1–10μm. The fully sealed negative pressure dust removal structure adapts to powder dust conditions, enabling 24-hour continuous operation without oil or water consumption. The magnetic field fluctuation of the magnetic system is controlled within 3%, delivering industry-leading separation precision.

After renovation, iron impurities in graphite powder are stably controlled below 1.8ppm, fully meeting raw material access standards for high-end power batteries exported to Japan and South Korea. The replacement cycle of wear-resistant liners of rear grinding machines is extended by 3 times, reducing monthly powder loss by 12 tons for a single production line. The enterprise signed procurement contracts for the same dry powder electromagnetic iron removal equipment for 5 newly expanded graphite production lines in Phase II.

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