• Improved steel cleanliness; inclusion flotation and sulfide and oxide shape control The goal of ladle refining is to deliver a ladle of homogeneous liquid steel to the caster (or ingot station) on time, at the right temperature, and meeting total chemical specifiions.
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Wen Yang, Lifeng Zhang, Xinhua Wang, Ying Ren, Xuefeng Liu, Qinglin Shan.Characteristics of inclusions in low carbon Al-killed steel during ladle furnace refining and calcium treatment. ISIJ International, 2013, 53(8): 1401-1410.  Wen Yang, Xinhua Wang
Steel Cleanliness : Deviations during the CAS-OB process
The results indie that cooling with scrap after the calcium treatment worsen the steel cleanliness in terms of non-metallic inclusions and should therefore be avoided. Furthermore, multiple of small aluminum additions late in the process is likely a contributing parameter to increase the projected length of the inclusions.
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Aluminized steel is steel that has been hot-dip coated on both sides with aluminium-silicon alloy.This process assures a tight metallurgical bond between the steel sheet and its aluminium coating, producing a material with a unique coination of properties possessed neither by steel nor by aluminium alone.
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Steel Cleanliness: Inclusions in Steel S
countered. According to analysis based on the steel ingots containing 0.01-0.15% sulfur, the morphology is typically clas-siﬁ ed into three types: a. Type I are silicon-killed steels (or steels incompletely killed with aluminum, zirconium or titanium). MnS arewith a
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Calcium Carbonate is the carbonic salt of calcium (CaCO3). Calcium carbonate is used therapeutically as a phosphate buffer in hemodialysis, as an antacid in gastric hyperacidity for temporary relief of indigestion and heartburn, and as a calcium supplement for preventing and treating osteoporosis.
SUBMERGED ENTRY NOZZLE CLOGGING DURING CONTINUOUS CASTING OF Al-KILLED STEEL …
When the steel solidifies, the solubility of oxygen approaches zero. The remaining oxygen in the melt will end up as oxide inclusions. In the Figure 4 are oxygen activity is plotted as a function of steel temperature. Calcium treatment is a countermeasure to avoid
INCLUSIONS IN CONTINUOUS CASTING OF STEEL
Alumina (Al2O3) inclusions in LCAK steel, and silica (SiO2) inclusions in Si-killed steel are generated by the reaction between the dissolved oxygen and the added aluminum and silicon deoxidants are typical deoxidation inclusions. Alumina inclusions arefigure 4.
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