Modification of Inclusions in Molten Steel by Mg-Ca Transfer from Top Slag: Experimental Confirmation of the 'Refractory-Slag-Metal-Inclusion (ReSMI)' Multiphase Reaction Model

被引：47

作者：

Shin, Jae Hong ^{[1
]}

Park, Joo Hyun ^{[1
]}

机构：

[1] Hanyang Univ, Dept Mat Engn, Ansan 15588, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2017年 / 48卷 / 06期

关键词：

NONMETALLIC INCLUSIONS; FORMATION MECHANISM; CALCIUM TREATMENT; SPINEL; EVOLUTION; ALUMINUM; SULFUR;

D O I：

10.1007/s11663-017-1080-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-temperature experiments and Refractory-Slag-Metal-Inclusion (ReSMI) multiphase reaction simulations were carried out to determine the effect of the ladle slag composition on the formation behavior of non-metallic inclusions in molten steel. Immediately after the slag-metal reaction, magnesium migrated to the molten steel and a MgAl2O4 spinel inclusion was formed due to a reaction between magnesium and alumina inclusions. However, the spinel inclusion changed entirely into a liquid oxide inclusion via the transfer of calcium from slag to metal in the final stage of the reaction. Calcium transfer from slag to metal was more enhanced for lower SiO2 content in the slag. Consequently, the spinel inclusion was modified to form a liquid CaO-Al2O3-MgO-SiO2 inclusion, which is harmless under steelmaking conditions. The modification reaction was more efficient as the SiO2 content in the slag decreases.

引用

页码：2820 / 2825

页数：6

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