The present invention relates to a Hoffmann filter. According to an embodiment of the present invention, the Hoffmann filter comprises: a conveyor chain installed to a main body while performing an orbital motion, so as to unidirectionally transfer a medium for filtering a fluid; and an electromagnet production part installed in the main body and selectively converting at least some portions of the conveyor chain into electromagnets. Owing to easy removal of iron, cleanliness of the fluid can be secured, thereby enabling recycling of the fluid with ease.;COPYRIGHT KIPO 2017
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