Demagnetizing device

The utility model relates to a demagnetizing device which comprises a conveying roller assembly and a magnetic attraction part, the conveying roller assembly comprises a plurality of roller bodies which are sequentially arranged in the first direction, and all the roller bodies are configured to be capable of rotating. The magnetic attraction piece is arranged towards the conveying face and used for providing a magnetic attraction effect. Wherein the surfaces, located on the same side, of all the roller bodies in the second direction jointly form a conveying face used for conveying slurry, and the first direction and the second direction are arranged in an intersecting mode. Thus, according to the demagnetizing device, shearing acting force can be provided for the slurry through the roller bodies of the conveying roller assemblies, so that the slurry forms a thin flow layer on the surface of the conveying face to flow, and rapid and effective demagnetizing of the magnetic attraction pieces is achieved.