Numerical Simulation on Bubble Behavior of Disintegration and Dispersion in Stirring-Injection Magnesium Desulfurization Process
Numerical Simulation on Bubble Behavior of Disintegration and Dispersion in Stirring-Injection Magnesium Desulfurization Process
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DOI：
10.2355/isijinternational.isijint-2016-511
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发表时间：
2017-03
影响因子：
1.8
通讯作者：
Jun-hong Ji;Ruquan Liang;Jicheng He
中科院分区：
文献类型：
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作者：
Jun-hong Ji;Ruquan Liang;Jicheng He
随着对优质超低硫钢需求的不断增加，钢铁工业精炼过程中的镁法脱硫得到了广泛的关注。在喷镁法脱硫反应中，铁水中的硫与镁之间的传质是脱硫反应的速率控制步骤，会抑制脱硫反应的进行。1，2）因此，脱硫剂浪费和脱硫效率低是喷镁法脱硫工艺的关键问题。3 -5）当应用常规喷射方法时，喷射的气泡尺寸大并且集中在喷嘴周围的部分空间中。喷吹气泡在铁水中上升速度快，与铁水接触不充分，造成脱硫剂浪费，脱硫效率低。因此，提高脱硫效率的关键在于如何使脱硫过程中的大气泡破碎和分散。目前，已对喷吹操作参数6、7）喷嘴结构8、9）和喷吹位置10）进行了改进，并对其破碎效果进行了研究搅拌喷吹镁法脱硫过程中气泡破碎与分散行为的数值模拟
The magnesium desulfurization for the refining process in the iron and steel industry gains intensive attention as the increasing demand for high quality and ultra-low sulfur steel. In the desulfurization reaction of magnesium injection method, the mass transfer between sulfur in the hot metal and magnesium is the rate-controlling step, which will inhibit the desulfurization reactions.1,2) Therefore, the desulfurizer waste and the low efficiency of desulfurization are critical problems in the desulphurization process using injection magnesium method.3–5) The injected bubbles are large in size and concentrate on the partial space around the nozzle when the conventional injection method is applied. The injected bubbles go up rapidly in the hot metal without adequate contacting with the hot metal, which results in the desulfurizer waste and low desulfurization efficiency in the deep desulphurization process. Therefore, the key way to improve desulfurization efficiency is how to disintegrate and disperse the large bubbles in the desulfurization process. So far, the improving on injection operation parameters,6,7) the structure of nozzles,8,9) and the injection location10) has been carried out, while its effect on disintegration Numerical Simulation on Bubble Behavior of Disintegration and Dispersion in Stirring-Injection Magnesium Desulfurization Process