In-situ observation of the behaviour of non-metallic inclusions at different interfaces in the system steel-slag-refractory

International Symposium on Liquid Metal Processing & Casting 2015

材料科学;金属工艺学

Michelic, S.K.^1 ; Salgado, U. Dieguez^1 ; Bernhard, C.^1

Ferrous Metallurgy, Montanuniversitaet Leoben, Franz Josef Straße 18, Leoben

8700, Austria^1

关键词: Attraction force;    Confocal scanning laser microscope;    Dissolution mechanism;    High temperature furnaces;    In-situ observations;    Metallurgical process;    Non-metallic inclusions;    Steelmaking temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/143/1/012010/pdf
DOI  :  10.1088/1757-899X/143/1/012010

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The system steel-slag-refractory and reactions of non-metallic inclusions at its interfaces are decisive in numerous metallurgical processes. In order to obtain the desired steel cleanness level, a detailed understanding of the occurring interactions is needed. This study focuses on the in-situ observation of different reactions of non-metallic inclusions in steel and slag. For this purpose a Confocal Scanning Laser Microscope attached to a high temperature furnace is applied which enables the visualization of metallurgical phenomena at steelmaking temperatures up to 1700 °C. Two different examples are discussed: First, the agglomeration of different inclusion types in a Ca-treated steel is described and corresponding attraction forces are calculated. Secondly, the dissolution of Al2O3and MgOAl2O3in two slags of the system CaO-Al2O3-MgO-SiO2is examined, including the evaluation of the governing dissolution mechanism. Finally, an outlook on further experimental possibilities is given.