Multiscale structure on influence factors of CaO-SiO2-Al2O3-MgO inclusion control
LIN Teng-chang1,ZHU Rong2,ZENG Jia-qing1,LI Shi-qi2
(1. Metallurgical Technology Institute, Central Iron and Steel Research Institute, Beijing 100081, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)
Abstract:It made a multiscale analysis of influence factors on CaO-SiO2-Al2O3-MgO inclusion melting point. The influence of[w(CaO)]on CaO-SiO2-Al2O3-MgO inclusion melting point was simulated by using Factsage. Multiscale analysis shows that the final controllable factor of unit operational (101 m) influence on inclusions composition (10-10 m) is the calcium wire feeding amount which improves the dynamic condition of molten pool (10-3 m) through local[w([Ca])]in molten steel (100 m), and changes[w(CaO)]in inclusions (10-10 m). Simulated results show that the percent of low melting point area in CaO-SiO2-Al2O3-MgO achieves a maximum when[w(CaO)]is 30%. It makes instance analysis of inclusions control effect in station-csale, which shows the feasibility of further multi-scale research on the cleanliness of molten steel.