Reasons for blockages in ceramic foam filters in iron and steel casting - Part 1

摘要

The use of ceramic foam filters in the industrial production of cast products represents current state-of-the-art technology. This is partly due to their very good filtration efficiency and ability to separate the non-metallic contaminants from the molten metal. In addition, the turbulence reducing effect of the filter limits the degree of re-oxidation of the molten metal. Occasionally, however, filter blockages occur. In the absence of an exact analysis to determine the cause, the filters involved are frequently deemed to be primarily responsible for these processes. In many cases, a cooperative effort with the foundry leads to the discovery of the true causes and allows suitable remedies to be adopted.