Novel composite ceramic foam filter

Abstract

The invention discloses a novel composite ceramic foam filter. The composite ceramic foam filter comprises a small filter and a large filter, which are concentric and cylindrical. The large filter and the small filter are combined up and down and sintered at high temperature into a whole part. High-temperature-resisting wrappers are arranged at the connected step of the small filter and the large filter, and the outer side of the small filter. The high-temperature-resisting wrapper at the outer side of the small filter is lower than the small filter. The high-temperature-resisting wrappers are high-temperature-resisting fiber paper or fiber felts, and the thickness of the high-temperature-resisting wrappers is 0.1-6 mm. When the novel composite foam ceramic filter is used, one end of the small filter penetrates inside a riser tube; the large filter is disposed outside the riser tube to play a supporting role; and the high-temperature-resisting fiber wrappers mainly play the roles of protecting and fixing the filters and preventing aluminum water from laterally leaking. The novel composite foam ceramic filter has the filtration effects of the filters, and is free of introduction of impurities such as iron. In addition, no slag easily falls off when the novel composite foam ceramic filter is in use. The novel composite foam ceramic filter is hard and durable, high in strength, and good in filtration effect, and has great significance for popularization.

Description

technical field [0001] The invention relates to a filter for foundry industry, in particular to a novel composite foam ceramic filter. Background technique [0002] Ceramic foam filter is a new type of filter developed in the past 20 to 30 years. Through the ceramic filter, it can effectively remove or reduce the inclusions in the molten metal, improve the purity of the molten metal, and make the cast metal The surface of the casting is smooth, the structure is uniform, the strength is improved, the scrap rate is reduced, and the machining loss is further reduced, and the labor productivity is improved. This type of product is mainly used for metal casting filtration in the foundry industry, and is suitable for casting of cast steel, cast iron, cast aluminum, alloy, non-ferrous metal castings and large castings. Therefore, the products are widely used in the casting of various castings in machinery manufacturing industries such as automobiles, shipbuilding, locomotives, agr...

AI Technical Summary

Problems solved by technology

The use of barbed wire is easy to bring in iron, which reduces the performance of the aluminum wheel hub, and the filtering capacity is limited; the use of conventional ceramic filters has a good filtering effect, and it needs to reserve a place in the riser pipe, which is easy to collide and drop slag during use, and more What's more, in the actual operation process, due to the excessive inflow of molten metal, the filter will be damaged, causing the filter to break into the casting, resulting in defects in the casting

Patent CN201482323U discloses a glass fiber filter bag for the riser nozzle used in hub casting, which prevents the increase of iron content in molten aluminum, but the filtering effect is general

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