影响LF精炼炉盖内气体流动的主要因素分析.pdfVIP

第十五届全国炼钢学术会议文集 影响 LF 精炼炉盖内气体流动的主要因素分析 温良英1 王勇2 陈登福1 马世立2 龙战军1 张生富1 (1.重庆大学材料科学与工程学院，重庆 400030 ； 2. 中冶赛迪工程技术股份有限公司科技开发部，重庆 400013) 摘 要: 利用 FLUENT 商用软件进行耦合数值求解，计算并分析了影响 LF 精炼炉盖内气体流动、传热、组分 分布的主要因素。结果表明，进入炉盖内的气体在主体部分流动规律是一致，露弧加热时达到硝烟除尘要求 的合理抽气压力为250Pa以上，炉盖中部局部高温区域大温度高，埋弧加热期合理抽气压力为200Pa左右， 炉盖壁面温度低得多，中部温度高温区仅为 330K（57℃）左右。在底吹氩气溢出液面的大部分区域只有氩 气组分，在远离底吹氩气流股的区域仍主要是氩气占80%以上，有利于保护钢液，防止其增〔N〕或〔O〕。 关键词: 炉盖,气体,流动,加热,抽气压力 Analysis of main effect factors on the gas flow in ladle furnace lid WEN Liang-ying1, WANG Yong2 , CHEN Dengfu1, LONG Zhanjun1 , ZHANG Shengfu1 (1.College of Material Science and Engineering, Chongqing University, Chongqing 400030, China; 2. Science and Technology Department of CISDI Engineering Co., Ltd. Chongqing 400013,China) Abstract: The main factors which influenced on fluid flow, heat transfer and component distributing in ladle furnace lid was calculated and analyzed by numerical simulation using FLUENT software. The results indicted that the fluid flow law in main zones is consistent. In the heating period of emerged arc, appropriate off-gas pressure is more than 250Pa and high temperature zones in the middle of lid is big. The appropriate off-gas pressure is about 200Pa in the heating period of submerged arc. And the temperature of the high temperature zones is much lower than the former, only about 330K(57 ℃). There is only argon component in majority zones of spillage surface of argon. The argon content of the other zones apart from argon flow is mainly, more than 80%, which is in favor of avoiding to the increase of [O] or [N] in molten steel. Key Words: ladle furnace lid, gas, flow, heating, off-gas pressure 1 前言 LF精炼炉盖内的