Effect of substituting Na2O for SiO2 on the non-isothermal crystallization behavior of CaO-BaO-Al2O3 based mold fluxes for casting high Al steels

Effect of Interfacial Reaction between CaO–BaO–Al2O3‐Based Mold Fluxes and High‐Mn–High‐Al Steels on Fundamental Properties and Lubrication of Mold Flux

“…Based on the results of previous studies and the properties of steel grades, to ensure steady continuous casting of high‐Mn–high‐Al steel, the η 1573K ( η 1300 °C ) should range from 0.05 to 0.40 Pa·s and the T m and T b of the mold slag should be controlled below 1423 and 1473 K (1150 and 1200 °C), respectively. Consequently, for the two CaO–BaO–Al 2 O 3 ‐based mold fluxes designed in this study, interfacial reaction caused the deterioration of the fundamental properties of the mold slag to a certain extent, but their basic properties after reacting with steel for 40 min still satisfied the demands of continuous casting.…”

“…Based on our previous studies, two low‐reactivity CaO–BaO–Al 2 O 3 ‐based mold fluxes, F1 and F2, containing approximately 10 mass% SiO 2 were designed. The addition of BaO helped to restrain crystallization and lower the viscosity of the slag .…”

“…This indicates that merely lowering the degree of interfacial interaction is not adequate and matters of crystallization and lubrication behavior of the mold flux should also be taken into account. To develop a mold flux designed particularly for the continuous casting of high‐Mn–high‐Al steels, a series of fundamental studies have been conducted in our laboratory, including studies of the effect of BaO on the crystallization properties of low‐reactivity CaO–Al 2 O 3 ‐based flux and the lubrication behavior of different slag systems. At present, a range of typical slag compositions can be determined that satisfy the requirements for continuous casting of high‐Mn–high‐Al steels.…”

Influence of Al₂O₃/SiO₂ and BaO/Al₂O₃ Ratios on Rheological and Crystallization Behavior of CaO–BaO–Al₂O₃-Based Mold Slags

“…transfer by mold slag in the shell/mold gap. [5][6][7][8][9][10][11] Hence, the low-reactivity of CaO-Al 2 O 3 -based mold slag was proposed by many researchers [12][13][14][15][16][17] through reducing the content of reactive component of SiO 2 and then replacing SiO 2 with amphoteric oxide components, such as Al 2 O 3 , to stabilize the slag performance.…”

Comprehensive Understanding of the Role of Carbon Black in the Sintering and Melting Behavior of Mold Flux

“…As an essential silicate material in the continuous casting process, mold flux is of great significance for the smoothness of continuous casting production and improvement of slab quality. [1][2][3][4][5][6] In general, mold fluxes will go through two vital stages during the whole continuous casting process. One is the heating stage.…”