Cast Steel Filtration Trials Using Ceramic-Carbon Filters

Journal title

Archives of Foundry Engineering




No 4

Publication authors


Molten metals’ filtration ; Foam filter ; Microstructure

Divisions of PAS

Nauki Techniczne


Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.


Trials of cast steel filtration using two types of newly-developed foam filters in which carbon was the phase binding ceramic particles have

been conducted. In one of the filters the source of carbon was flake graphite and coal-tar pitch, while in the other one graphite was

replaced by a cheaper carbon precursor. The newly-developed filters are fired at 1000o

C, i.e. at a much lower temperature than the

currently applied ZrO2-based filters. During filtration trials the filters were subjected to the attack of a flowing metal stream having

a temperature of 1650°C for 30 seconds.

Characteristic of the filters’ properties before and after the filtration trial were done. It was found, that the surface reaction of the filter

walls with molten metal, which resulted in local changes of the microstructure and phase composition, did not affect on expected filter

lifetime and filtration did not cause secondary contamination of cast steel.


The Katowice Branch of the Polish Academy of Sciences




Artykuły / Articles


ISSN 2299-2944