The influence of slenderness ratios of multi- hole ceramic filters from λ = 1.67 to λ = 8.36 of filter surface on efficiency of liquid steel refining from solid non metallic inclusions

• Autorzy: Janiszewski K.
• Języki publikacji: EN

Abstrakty

EN

Purpose: I propose in this publication to introduce the additional, standardized conception, characterizing the filters used in research works (already known in metallurgy in definitions of forms of the ingot moulds) - the filter slenderness ratio. Design/methodology/approach: In order to confirm the theoretical assumptions we have performed a series of the laboratory scale experiments (for the filter slenderness ratio SF1 λ = 1.67 and SF2 λ = 8.36). Findings: The influence of the filter slenderness on the filtration process efficiency has been determined through variations in quantities and surface shares of the non-metallic inclusions in the filtrated steel in relation to the non-filtered steel. We present also the results of researches on the separating surfaces between the liquid steel and the ceramic filter material, which in form of photos and scanning microscope microanalyses are put together in the publication. Research limitations/implications: The aim of the research carried out has been to prove that the liquid steel filtration is a cheap and efficient additional processing stage, separating the non-metallic inclusions, which in case of the conventional casting technology could remain in the cast steel bodies. Practical implications: The research results presented in the paper can be used for steel production of high purity steels. Originality/value: The goal of the research carried out, the results of which are presented here, has been to prove the possible extent of the solid non-metallic inclusion removal from liquid steel through the steel filtration by means of multiple-orifice ceramic filters. These inclusions most frequently throw into confusion the process of continuous casting d inclusion deposits formed on the walls of the submersion-type nozzles, which gradually reduce the nozzle cross-section (which cause nozzle accretion).

Słowa kluczowe

EN

quantitative metallography; refining; ceramic filter; solid non-metallic inclusions; filter slenderness ratios

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 410--415
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Janiszewski K.

• Department of Metallurgy, Silesian University of Technology, ul. Karsińskiego 8, 40-019 Katowice, Poland

Bibliografia

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