Effect of initial aluminium-oxygen concentration product on alumina-based inclusions in high carbon Al-killed steels during the ladle refining process

2021 ◽  
pp. 1-8
Author(s):  
Yanhui Zhang ◽  
Lifeng Zhang ◽  
Ying Ren ◽  
Wen Yang
Keyword(s):  
Oxygen Concentration ◽  
Refining Process ◽  
High Carbon ◽  
Ladle Refining

Effect of B2O3 and CaF2 on Viscosity of Ladle Refining Slag

2011 ◽  
Vol 295-297 ◽  
pp. 2647-2650 ◽  
Author(s):  
Hong Ming Wang ◽  
Ting Wang Zhang ◽  
Hua Zhu ◽  
Yong Qi Yan ◽  
Yi Nan Zhao
Keyword(s):  
Refining Process ◽  
Slag Viscosity ◽  
Mass Ratio ◽  
Refining Slag ◽  
Ladle Refining ◽  
Ladle Slag ◽  
Viscosity Measurements ◽  
Cylinder Method

To avoid slag sticking onto the snorkel during CAS-OB ladle refining process, B2O3-CaO(mass ratio equals 1:1) and CaF2-CaO(mass ratio equals 1:1) were respectively employed as modifiers added to decrease the viscosity of ladle slag. The rotary cylinder method was adopted in the viscosity measurements. The results showed that the modifiers could decrease the viscosity of ladle refining slag remarkably. At 1500°C, the viscosity of ladle slag without any modifiers is about 6.0 Pa·s. But by adding more than 10mass% CaO-B2O3 or CaO-CaF2, the slag viscosity at 1500°C could be decreased lower than 1.0 Pa·s. The mechanism of modifiers decreasing the slag viscosity was analyzed.

Investigation of tungsten concentrate used for alloying in ladle refining process

1994 ◽  
Vol 65 (3) ◽  
pp. 85-89
Author(s):  
Weiqing Chen ◽  
Rongzhang Zhou ◽  
Wan-Wook Huh ◽  
Chang-Hee Rhee
Keyword(s):  
Refining Process ◽  
Ladle Refining

scholarly journals Mixing and mass transfer in ladle refining process.

1989 ◽  
Vol 29 (2) ◽  
pp. 148-153 ◽  
Author(s):  
Kanehiro Ogawa ◽  
Toshio Onoue
Keyword(s):  
Mass Transfer ◽  
Refining Process ◽  
Ladle Refining

scholarly journals Spout Eye Area in Ladle Refining Process

2004 ◽  
Vol 44 (3) ◽  
pp. 636-638 ◽  
Author(s):  
Manabu Iguchi ◽  
Ken-ichiro Miyamoto ◽  
Shintaro Yamashita ◽  
Daisuke Iguchi ◽  
Masafumi Zeze
Keyword(s):  
Refining Process ◽  
Ladle Refining

scholarly journals Analysis of Inclusion Behavior in a Ladle Refining Process by a Newly Developed Coagulation Model

1999 ◽  
Vol 85 (5) ◽  
pp. 368-374 ◽  
Author(s):  
Katsuhiro FUCHIGAMI ◽  
Masamitsu WAKOH ◽  
Naochika IMAMURA ◽  
Koichi ENDOH ◽  
Akito KIYOSE ◽  
...  
Keyword(s):  
Refining Process ◽  
Ladle Refining

scholarly journals Decarburization of ferrochrome and high alloy steels with optimized gas and slag phases towards improved Cr retention

2013 ◽  
Vol 49 (2) ◽  
pp. 175-181 ◽  
Author(s):  
H. Wang ◽  
M.M. Nzotta ◽  
L. Teng ◽  
S. Seetharaman
Keyword(s):  
Mass Transfer ◽  
Induction Furnace ◽  
Refining Process ◽  
Endothermic Reaction ◽  
High Carbon ◽  
High Alloy ◽  
High Alloy Steel ◽  
Carbon Ferrochrome ◽  
Alloy Steels ◽  
Gas Molecules

Chromium is a high value metal and the retention of the same during the refining of high carbon ferrochrome as well as high alloy steel has significant economic and environmental impacts. The loss of chromium during the decarburization is generally minimized using argon-oxygen mixtures thereby reducing the oxygen partial pressure (PO2) of the oxidant gas. In the current study, experiments were carried out in an induction furnace and CO2 was introduced with the view to partly reduce PO2 and partly as an oxidizer. During these experiments, the decarburization of molten Cr-alloy was conducted using pure O2, pure CO2 or O2+CO2 mixtures. The results demonstrated that the Cr loss can be minimized under CO2 introduction. The kinetic analysis showed that the mass transfer is effective due to the production of 2CO gas molecules from one CO2 molecule during the reaction which will improve the stirring of the bath. Besides, CO2 reacts with carbon in melt is an endothermic reaction, introduction of CO2 could be a cooler during the refining process, hence the temperature could be controlled by controlling the diluting gas amount, in this case, the over heat of bath refractory could be prevented and the lifetime of refractory could be extended.

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