At present, more and more aluminum processing plants use foamed ceramic crucibles for on-line wave removal of aluminum melts. However, ceramic filter plates still have some problems in terms of strength, use effect and cost. In view of this situation, after more than one year of trial production, we solved the disadvantages of the low strength of the ceramic foam filter plate and its tendency to chip away. The use of industrial tests has shown good results.
This article mainly introduces the formulation of foam ceramic filter plate slurry, its manufacturing process and the influence of its parameter selection on its use effect. Foam ceramic filter panels are generally produced using organic foam immersion methods or foaming methods. Due to various factors and other factors, we chose the bubble leaching method. The ceramic filter plate produced by this method has the advantages of uniform pore size, high through-porosity, and good filtering effect. It is a porous body with a three-dimensional network skeleton structure. Due to its special structure, it brings a lot of trouble to production. This requires that the refractory material has a small thermal expansion coefficient, a strong chemical stability, and a wide temperature range (normal temperature , moderate temperature, high temperature) sufficient compression and breaking strength. In a sense, it not only has the properties of a special high quality refractory material but also has the properties of a special foot porcelain.
The filter plate should have enough strength. The ceramic filter plate is brittle and hard. In the case of insufficient strength, the plate is easy to chip and fall. It is not only unfavorable to storage and transportation, but also falls into the molten aluminum during fishing. The body will also affect the quality of the billet. The compressive strength of the filter plate can generally reach 0.6MPa. When the filter plate is to be cast by heat-resistant aluminum liquid, the high-temperature aluminum liquid suddenly contacts the surface of the filter plate and heats the male plate in a few seconds.
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