Steel Cleanliness during Secondary Metallurgy of High-grade Quality Electric Steels

2005 ◽  
Vol 76 (7) ◽  
pp. 475-480 ◽  
Author(s):  
Rob Dekkers ◽  
Nedeljka Jokanovic ◽  
Anton Rombout ◽  
Bart Blanpain ◽  
Patrick Wollants
Keyword(s):  
High Grade ◽  
Secondary Metallurgy ◽  
Steel Cleanliness

Slag Formation – Thermodynamic Aspects and Experimental Observations

2016 ◽  
Vol 16 (4) ◽  
pp. 227-232
Author(s):  
Lauri Holappa ◽  
Yilmaz Kacar
Keyword(s):  
Calcium Aluminate ◽  
Reactor Vessel ◽  
Slag Formation ◽  
Refractory Materials ◽  
Reaction Products ◽  
Aluminum Dross ◽  
Secondary Metallurgy ◽  
Rapid Process ◽  
Steel Cleanliness ◽  
Metallurgical Processes

AbstractSlags have a central role in pyro-metallurgical processes. They bind impurity compounds and absorb reaction products like oxides and sulfides. Functional slags are made by adding lime, magnesia, fluorspar, bauxite, calcium aluminate or other compounds into the reactor vessel where they form the slag together with the targeted reaction products. Additionally, refractory materials of the vessel tend to dissolve into the slag and thus influence its properties. Converter process for steelmaking is a rapid process and slag formation is extremely essential to ensure slag’s metallurgical functions and to avoid harmful reactions with the refractory materials. In this contribution, the progress of understanding the phenomena controlling slag formation and means to promote it were shortly reviewed. Thermodynamic constraints in slag formation were examined and the influence of fluxing additions was experimentally stated. Prefabricated “self-fluxing” lime was tested in industrial scale and proved to be a potential slag forming agent. Slag formation in secondary metallurgy and reduction of slag with aluminum dross or granules were experienced, and the effect on desulfurization and steel cleanliness was discussed.

1278: The Role of Diagnostic Criteria of Obstruction in Patients with High Grade Cystocele: Correlation to Subjective Symptoms

2007 ◽  
Vol 177 (4S) ◽  
pp. 421-421
Author(s):  
Veronica Triaca ◽  
Christian O. Twiss ◽  
Ramdev Konijeti ◽  
Larissa V. Rodriguez ◽  
Shlomo Raz
Keyword(s):  
Diagnostic Criteria ◽  
High Grade ◽  
Subjective Symptoms

474: Prostate Specific Antigen (PSA) vs. Cancer Volume and High-Grade Cancer (PCA) Volume at Radical Prostatectomy (RP) in a Large European Cohort: Is the PSA Era Over in Europe as Well?

2005 ◽  
Vol 173 (4S) ◽  
pp. 130-130
Author(s):  
Pierre I. Karakiewicz ◽  
Paul Perrotte ◽  
Thomas Steuber ◽  
Alexander Haese ◽  
Markus Graefen ◽  
...  
Keyword(s):  
Radical Prostatectomy ◽  
Prostate Specific Antigen ◽  
Specific Antigen ◽  
High Grade

1632: High Grade Varicocele and Low Sperm Density are Associated with High Degree of Sperm Chromatin Damage in Infertile Men

2006 ◽  
Vol 175 (4S) ◽  
pp. 526-526
Author(s):  
Mara A. Monoski ◽  
Darius A. Paduch ◽  
Marc Goldstein
Keyword(s):  
Sperm Chromatin ◽  
High Grade ◽  
Sperm Density ◽  
Infertile Men ◽  
High Degree

High-Grade Anogenital IN Requires Long-Term Surveillance for Progression

2007 ◽  
Vol 38 (2) ◽  
pp. 48
Author(s):  
Sharon Worcester
Keyword(s):  
High Grade

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.

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