The following are professional answers to five core questions that aluminum plant customers are concerned about, aiming to highlight the advantages of alumina ceramic filter plates and eliminate customer concerns:
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30-60ppi pore size corresponds to a filtration accuracy of 50-100 microns, which can efficiently intercept Al₂O₃ inclusions (typical size > 50μm), and the inclusion content of aluminum liquid after filtration is <0.02mm²/kg (in line with GB/T - standard), meeting the needs of aerospace (such as AMS E) and automotive parts (such as Volkswagen VW) for high-purity aluminum liquid.
Alumina ceramics have a melting point of >℃ and can work continuously for ≥72 hours in 700-800℃ aluminum liquid without softening and deformation problems (verified by SGS high temperature creep test).
Adopting gradient sintering crystal phase technology, it has passed 30 hot and cold cycles (800℃↔room temperature) test without cracks (in compliance with ISO standard), and is suitable for the frequent start-stop conditions of the foundry workshop.
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Through three-dimensional interconnected holes + gradient pore size structure (surface layer 60ppi→middle layer 40ppi→bottom layer 30ppi), the air permeability reaches - L/(m²·min·Pa), achieving a flow rate of 1.5-2.2 tons/minute (adaptable to mainstream casting lines), and the filtration efficiency is ＞95% while ensuring production capacity.
After application in the automobile wheel hub factory, the casting efficiency increased by 15%, and the inclusion defect rate dropped to below 0.3%.
A single foam filter plate can process 400-600 tons of aluminum liquid (depending on the impurity load), support continuous production for 5-7 days, and the replacement frequency is 50% lower than that of ceramic foam ceramics.
Although the unit price is higher than foam ceramic filters, the service life is extended by 3 times (compared with test data), the comprehensive cost is saved by 40 %+, and downtime losses are reduced.