Abstract：The aim of the present study is to find the source of MnO/FeO-containing macro-inclusions on the basis of the results of slime method and industrial trials. According to the comparison with micro-inclusions in steel， it is found that there is no obvious relationship between MnO/FeO-containing macro-inclusions and micro-inclusions in steel. Thermodynamic calculation also rules out the possibility that those inclusions are formed by the reoxidation of liquid steel， and it is confirmed that the MnO/FeO-containing macro-inclusions are from ladle filler sands and their sintering products based on the compositions of macro-inclusions and the sintering behaviors of ladle filler sands. When ladle filler sands fall into liquid steel， it is very difficult to remove from tundish， even after the middle casting stage of each heat. Therefore， at the beginning of the teeming stage of each heat， the removal of ladle filler sand becomes a very important step to control macro-inclusions during industrial process.
收稿日期: 2017-06-27
出版日期: 2018-02-26
引用本文:
邓志银，朱苗勇. 合金钢中MnO/FeO大型夹杂物来源分析[J]. , 2018, 53(2): 27-31.
DENG Zhi-yin，ZHU Miao-yong. Analysis on source of MnO/FeO containing macro-inclusions in alloyed steel. Iron and Steel, 2018, 53(2): 27-31.
2018, Vol. 53 
