Solid inclusion cakes formed during pressure filtration tests of liquid aluminum alloys

摘要

Liquid metal quality has been an important topic for aluminum alloys in both industry and academic circles. Pressure filtration, or pre-concentration techniques have been among the principal methods of measuring the contents of solid inclusions. In this work, the mutual relationships between the main variables related to liquid metal quality, filter medium, filtration process, and the formed filter cake are effectively established, based on the classic filtration theories of cake mode combined with the quantitative metallurgy of the filter cake. For the first time the specific cake resistance, formation and growth dynamics of filter cakes can be quantitatively calculated. This progress will significantly help to quantitatively understand the filtration behavior during the detection of liquid metal quality. A typical example is illustrated in this work.