Interaction between ultra- low carbon liquid steel and MgO- C refractories containing different carbon contents
WANG Li1,2,LI Guang- qiang1,2,3,LIU Yu1,2,ZHANG Zhao1,2,LI Ya- wei1��XU Xiao- feng1
1��State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology,Wuhan 430081, Hubei�� China 2��Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 3�� Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
Abstract��Interaction between three kinds of MgO- C refractories with different carbon contents (3 mass%, 5 mass%, 10 mass%) and ultra- low carbon liquid steel were investigated. The composition of molten steel was analyzed by ICP- AES, oxygen- nitrogen analyzer and carbon- sulfur analyzer, and the phase changes of refractories before and after reaction were analyzed by XRD, and the interfaces of refractories and steels were observed by SEM. The results show that with increasing carbon content in MgO- C refractories, the thickness of transition layer near the interface of refractory and steel increases. After reaction, the contents of C, N, Al and Mg in the samples increase with increasing carbon content in the refractory, and O content in the steel decreases. There is magnesia- alumina spinel in the refractories no matter before or after reaction, the magnesia- alumina spinel content in refractories with high carbon content increases after reaction. So MgO- C refractories with low carbon content are more favorable for ultra- low carbon steelmaking.
���� ���ǿ ������ ������ ������ΰ����С��. ��̼ͬ������MgO- C�ͻ�����볬��̼��Һ�������[J]. �й������ڿ���, 2017, 29(8): 616-625.
WANG Li,,LI Guang- qiang,,,LIU Yu,,ZHANG Zhao,,LI Ya- wei��XU Xiao- feng. Interaction between ultra- low carbon liquid steel and MgO- C refractories containing different carbon contents. Chinese Journal of Iron and Steel, 2017, 29(8): 616-625.
2017, Vol. 29 
