Agglomerate mechanism: ceramic filter plate composite structure can effectively process slag. Liquid metal has a complex structure when it passes through a foam ceramic filter. Through the mechanical separation of the filter medium, the filter surface larger than the hole is filtered and precipitated at the end of the filtered liquid metal, becoming a component filter. More and more inclusions accumulated on the filter surface, gradually forming a layer of filter cake, further refining the metal flow, by adding filter media on the surface can filter out more small packages. At the same time, the media has a filtering effect. The ceramic body and the number of holes have small cracks or dead. In different fields, these changes are the possible positions of the inclusion to be intercepted, and there is a "cake" effect in the filter.

Surface effect: When the molten metal flowing through the ceramic body has a complex structure, it is divided into many small streams, increasing the contact area and contact probability of the liquid metal inclusions with the filter medium. Due to the small convex and concave shape on the surface of the filter element, the concave block is about 1-10 meters in size, and the inclusion is intercepted by electrostatic adsorption and adhesion.

Rectifying effect: the liquid metal foam ceramic filter is divided into many small unit flows and smaller diameters, and the Reynolds number (Re = VD/R) becomes smaller, making the liquid flow tend to laminar flow. When the liquid metal is in laminar flow, the density of the liquid metal is much greater than the density of the inclusion, so there is enough time to float up for removal. Foam ceramic filter plate can help remove slag. The filter flow resistance placed in the pouring system becomes larger, and the liquid metal flow forms sufficient movement in the liquid metal pouring, thus reducing the flow rate, which is conducive to the inclusion floating and retention on the top of the flow channel.

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