| 透气砖底吹净化铝熔体的除气效率分析 |
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| 引用本文： | 疏达,王俊,丁三才,孙宝德,王云利,赵洪生,金建华,栗争光,张军.透气砖底吹净化铝熔体的除气效率分析[J].轻合金加工技术,2009,37(9). |
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| 作者姓名： | 疏达 王俊 丁三才 孙宝德 王云利 赵洪生 金建华 栗争光 张军 |
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| 作者单位： | 疏达,王俊,丁三才,孙宝德(上海交通大学,金属基复合材料国家重点实验室,上海,200240);王云利,赵洪生,金建华,栗争光,张军(中铝包头铝业有限公司,包头,014046) |
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| 基金项目： | 国家重点基础研究发展计划(973)课题，国家杰出青年科学基金项目 |
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| 摘 要： | 在线测量了透气砖底吹净化装置的除气效果,从除气动力学方程出发建立了除气效率的计算模型,计算了气泡尺寸,并考虑气体受热膨胀和合泡的影响对其进行了修正.试验结果表明,除气效率随N2流量的增加而增大,当采用N2作为净化气体时,除气效率在40%以内,而采用N2-Cl2混合气体时,除气效率提高约10%.修正后计算得出通过透气砖吹入铝液中的气泡尺寸约为4 mm,除气效率计算值与试验结果较吻合.除气过程中气泡利用效率为50%～70%.从动力学角度分析得出了提高除气效率的主要途径.
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| 关 键 词： | 铝熔体 透气砖 除气效率 动力学 |
Analysis of degassing efficiency of porous brick to purify molten aluminum |
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| SHU Da,WANG Jun,DING San-cai,SUN Bao-de,WANG Yun-li,ZHAO Hong-sheng,JIN Jian-hua,LI Zheng-guang,ZHANG Jun.Analysis of degassing efficiency of porous brick to purify molten aluminum[J].Light Alloy Fabrication Technology,2009,37(9). |
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| Authors: | SHU Da WANG Jun DING San-cai SUN Bao-de WANG Yun-li ZHAO Hong-sheng JIN Jian-hua LI Zheng-guang ZHANG Jun |
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| Affiliation: | 1.State Key Laboratory of Metal Matrix Composites;Shanghai Jiao Tong University;Shanghai 200240;China;2.Baotou Aluminum Corporation Limited of CHALCO;Baotou 014046;China |
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| Abstract: | The degassing efficiency of an on-line gas purging refining setup for molten aluminum using porous bricks was measured.A calculation model was established based on the kinetic equation of degassing.The bubble size was calculated and modified by taking thermal expanding and bubble coalescence into consideration.Experimental results show that degassing efficiency increases with the volumetric flow rate of nitrogen,with a value of less than 40 percent when purging N2 only and improved by 10 percent or so in th... |
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| Keywords: | molten aluminum porous brick degassing efficiency kinetics |
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