![\"Porous](\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/01\/Porous-Ceramic-Foam-Filter.jpg\")
<\/p>\nThe porous ceramic foam filter uses polyurethane foam as a carrier, immerses it in a coating made of ceramic powder, binder, sintering aid, suspending agent, etc., and then extrudes the excess coating to uniform the ceramic coating ground applied to the carrier. The skeleton becomes a green body, and the green body is dried and fired at a high temperature.<\/p>\n
Porous ceramic foam filters are divided into bonded type and sintered type. The former relies on a binder to bond fine ceramic particles together, while the latter relies on high temperature insulation to sinter relatively pure ceramic fine particles.<\/p>\n
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The porous ceramic foam filter has a unique three-dimensional connected curved pore network structure, with a porosity as high as 80% to 90%, and has the following three filtration and purification mechanisms.<\/p>\n
1. Mechanical interception<\/p>\n
2. Rectifier scum<\/p>\n
The rectification effect of the filter makes the flow channel located in front of the filter, so that the filtered aluminum water is in a smooth laminar flow state, and the oxidation and corrosion reaction of aluminum is weakened, so that the inclusions are easy to float and trap, and the filter reduces the reduction The number of secondary inclusions is reduced.<\/p>\n
3. Deep adsorption<\/p>\n
The fine inclusions that enter the filter are attracted to the skeleton or remain in the dead space of the mesh due to full contact with the ceramic mesh with complex flow paths.
\nThrough these three filtering and purification mechanisms, it can effectively filter out large inclusions and a large amount of small suspended matter as small as tens of microns in the aluminum liquid. The filtration efficiency of the ceramic foam filter is as high as 95%, which is greatly reduced. Casting scrap rate and weld repair rate.<\/p>\n
In addition, it simplifies the gate system and improves the metallurgical structure, thereby increasing the output and productivity of the casting process, and improving the internal quality, workability and workability of the casting.<\/p>\n