精炼时利用小气泡搅拌去除钢液中的氢和夹杂物  

Hydrogen and Inclusion Removal from Liquid Steel by Small Bubbles Stirring during Refining

作　　者：赵晶晶[1] 程树森[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《特殊钢》2010年第2期29-32,共4页Special Steel

基　　金：国家自然科学基金资助项目(60672145)

摘　　要：通过理论计算研究和分析了钢液气泡直径、吹气量和吹气时间对精炼时去氢和夹杂的影响。氩气经透气砖进入钢液后会形成大量的气泡,小气泡在钢液中能有效地增大脱气面积,有利于减小钢液中的氢含量。夹杂物与气泡的粘附上浮是钢液中去除夹杂物的一种有效方式,气泡越小、夹杂物越大,夹杂物就越容易去除。在钢包精炼过程中,应使用小气泡来达到较好的去氢和去夹杂效果,气泡的最优直径为1～3 mm。The effect of gas bubble size, injection rate and blowing time on removal of hydrogen and inclusion in liquid steel during refining has been studied and analyzed by theory calculation. A large number of bubbles form in liquid steel as the argon gas injection through porous brick. Small bubbles are available to increase the degassing area in liquid steel and favorable to decrease hydrogen content in steel. Inclusion adhering to bubble then going up is an effective way to remove the inclusions, and the smaller the bubbles and the larger the inclusions, the easier to remove the inclusions from liquid steel. During ladle refining, it is available to remove the hydrogen and the inclusions in liquid steel by small injecting bubbles, and the optimum bubble diameter is 1 - 3 mm.

关 键 词：吹氩 小气泡 氢 夹杂 

分 类 号：TF704.7[冶金工程—钢铁冶金]