Effect of refining slag containing Ce2O3 on steel cleanliness

2011 ◽  
Vol 29 (11) ◽  
pp. 1079-1083 ◽  
Author(s):  
Xiaohong YANG ◽  
Hu LONG ◽  
Guoguang CHENG ◽  
Chengchuan WU ◽  
Bin WU
Keyword(s):  
Refining Slag ◽  
Steel Cleanliness

scholarly journals Effect of Mn Content on the Reaction between Fe-xMn (x = 5, 10, 15, and 20 Mass Pct) Steel and CaO-SiO2-Al2O3-MgO Slag

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1200
Author(s):  
Huixiang Yu ◽  
Muming Li ◽  
Jiaming Zhang ◽  
Dexin Yang
Keyword(s):  
Oxygen Content ◽  
Thermodynamic Analysis ◽  
Slag Composition ◽  
Composition Change ◽  
Number Density ◽  
Refining Slag ◽  
Steel Cleanliness ◽  
Mn Content ◽  
Mn Steel ◽  
Top Slag

Medium- and high-Mn steels have excellent properties but are very difficult to be commercially produced because of the high content of some alloy elements. To enhance the understanding of the reaction between medium/high-Mn steel and refining slag which is significantly different from the conventional steels, steel and slag composition and the inclusions were investigated by equilibrium reaction between Fe-xMn (x = 5, 10, 15, and 20 mass pct) and CaO-SiO2-Al2O3-MgO top slag at 1873 K in the laboratory. Furthermore, the effect of Mn content on inclusion transformation and steel cleanliness was also explored. After slag–steel reaction, both contents of MnO in slag and Si in steel increased. Most MnO inclusions in master steel transformed to MnO-SiO2 and MnO-Al2O3-MgO. With the increase in Mn content, the amount share of MnO type inclusions decreased and that of MnO-Al2O3-MgO type increased. In addition, both the number density of observed inclusions and the calculated oxygen content in inclusions increased. Thermodynamic analysis indicates that the composition change of steel and slag and the transformation of inclusions are mainly the consequence of the reaction between Mn in molten steel and SiO2 and MgO in top slag. The dissolved Mn in medium/high-Mn steel presents a strong reactivity.

Investigation on the control of multiphase flow behavior in a continuous casting tundish during ladle change

2020 ◽  
Vol 117 (6) ◽  
pp. 619
Author(s):  
Rui Xu ◽  
Haitao Ling ◽  
Haijun Wang ◽  
Lizhong Chang ◽  
Shengtao Qiu
Keyword(s):  
Multiphase Flow ◽  
Flow Behavior ◽  
Rolled Strip ◽  
Impact Zone ◽  
Steel Cleanliness ◽  
Carry Over ◽  
Slag Carry Over ◽  
Hot Rolled ◽  
Turbulence Inhibitor ◽  
The Impact

The transient multiphase flow behavior in a single-strand tundish during ladle change was studied using physical modeling. The water and silicon oil were employed to simulate the liquid steel and slag. The effect of the turbulence inhibitor on the slag entrainment and the steel exposure during ladle change were evaluated and discussed. The effect of the slag carry-over on the water-oil-air flow was also analyzed. For the original tundish, the top oil phase in the impact zone was continuously dragged into the tundish bath and opened during ladle change, forming an emulsification phenomenon. By decreasing the liquid velocities in the upper part of the impact zone, the turbulence inhibitor decreased considerably the amount of entrained slag and the steel exposure during ladle change, thereby eliminating the emulsification phenomenon. Furthermore, the use of the TI-2 effectively lowered the effect of the slag carry-over on the steel cleanliness by controlling the movement of slag droplets. The results from industrial trials indicated that the application of the TI-2 reduced considerably the number of linear inclusions caused by ladle change in hot-rolled strip coils.

Optimization of bath mixing and steel cleanliness during steel refining through physical and mathematical modeling

Sadhana ◽  
2021 ◽  
Vol 46 (3) ◽  
Author(s):  
PRANAV KUMAR TRIPATHI ◽  
D SATISH KUMAR ◽  
AMIT SARKAR ◽  
S C VISHWANATH
Keyword(s):  
Mathematical Modeling ◽  
Steel Cleanliness ◽  
Steel Refining ◽  
Physical And Mathematical Modeling

Effect on Position of Electromagnetic Stirring on Inclusion Behaviors in Billet

2013 ◽  
Vol 805-806 ◽  
pp. 1716-1719 ◽  
Author(s):  
Gui Fang Zhang ◽  
Yue Hua Ding ◽  
Zhe Shi
Keyword(s):  
Liquid Steel ◽  
Electrical Current ◽  
Medium Carbon Steel ◽  
Electromagnetic Stirring ◽  
Cast Billet ◽  
Inclusion Removal ◽  
Optimum Position ◽  
Steel Cleanliness ◽  
Plant Trials

A considerable number of research works have been carried out to study the effects of electric current and frequency of Electromagnetic Stirring (EMS) on the quality of cast steels, but there are only a few studies available addressing the effects of EMS location on inclusion removal and steel cleanliness An ideal position of EMS will improve inclusion floatation and separation from liquid steel. However, inappropriate installation will lead to the entrapment of the slag into liquid steel, and impact the quality of cast billet. The current applied for these plant trials was 300A at a frequency of 3Hz,positions form axial centers of EMS to the top of the mold were 450mm, 510mm and 690mm respectively . 130 billets of medium carbon steel were produced and samples were taken for spectral analysis to study the effects of installation location of EMS on steel cleanliness. The experimental results show that the optimum position of EMS should be placed 510mm from the top end of the copper mold when the electrical current is 300A at frequency of 3 Hz. The three parameters of placement of EMS in paper were obtained from the simulation results, and this paper focused mainly on the effect EMS position on inclusion behaviors in billet.

Improvements in steel cleanliness by tundish inertisation

1993 ◽  
Vol 90 (1) ◽  
pp. 71-76 ◽  
Author(s):  
N. Bannenberg ◽  
K. Harste
Keyword(s):  
Liquid Steel ◽  
Study Results ◽  
Steel Cleanliness

The liquid steel, in contact with the atmosphere during the casting, will pick-up oxygen and nitrogen ; its cleanliness will be spoiled. It happens particularly on unsteady states such as ladle change or casting start. Completely closed tundishes previously argon flushed reduce this risk. Tests have been performed at Dillingen to study results and conditions of this technology.

Effect of Al2O3content on metallurgical characteristics of refining slag

2016 ◽  
Vol 43 (8) ◽  
pp. 607-615 ◽  
Author(s):  
H. Yu ◽  
J. Xu ◽  
J. Zhang ◽  
X. Wang
Keyword(s):  
Refining Slag

scholarly journals Application of Alkali Oxides in LF Refining Slag for Enhancing Inclusion Removal in C96V Saw Wire Steel

2018 ◽  
Vol 58 (7) ◽  
pp. 1232-1241 ◽  
Author(s):  
Yang Li ◽  
Changyong Chen ◽  
Zhouhua Jiang ◽  
Meng Sun ◽  
Hao Hu ◽  
...  
Keyword(s):  
Refining Slag ◽  
Inclusion Removal ◽  
Alkali Oxides ◽  
Wire Steel ◽  
Lf Refining

scholarly journals Effect of Medium Basicity Refining Slag on the Cleanliness of Al-killed Steel

2021 ◽  
Vol 61 (12) ◽  
pp. 2882-2888
Author(s):  
Huixiang Yu ◽  
Guangyuan Qiu ◽  
Jiaming Zhang ◽  
Xinhua Wang
Keyword(s):  
Refining Slag
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