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Effect of quaternary basicity on softening-melting behavior of primary slag based on magnesium flux pellet

Journal of Iron and Steel Research International 2022年第8期29卷 1185-1193页

作者： Kai-kai Bai Hai-bin Zuo Wen-guo Liu Jing-song Wang Jian-sheng Chen Qing-guo Xue State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

It is generally accepted that the softening-melting properties of ferrous burden play a vital role in optimizing the shape and position of cohesive *** effect of quaternary basicity and atmosphere on softening,melting and permeation temperatures of primary slag based on magnesium flux pellet was investigated by visualization *** mechanisms were analyzed utilizing thermodynamic calculation,X-ray diffraction analysis and electron probe *** results indicated that the softening and melting temperatures of oxide samples increased by approximately 120℃with increasing quaternary basicity from 0.3 to 1.2 owing to the formation of slag phases with high melting point and solid ***,the difference between softening and melting temperatures decreased from 21 to 11℃.The permeation temperature was not affected by the quaternary basicity and fluctuated around a level of 1250 C,given that the permeation temperature depends on the wettability between slag and coke *** the other hand,as the ratios of CO/CO_(2) varied from 3/7 to 7/3,there were no significant differences in either the softening or melting temperatures,whereas the permeation temperature was increased from 1239 to 1271℃ since the reduction of FeO-bearing phases to solid Fe could decrease the wettability between slag and coke bed.

关键词： magnesium flux pellet Primary slag Quaternary basicity CO/CO_(2)ratio Cohesive zone Softening-melting Behavior

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