Vol.28 No.3 李履等：Ca0颗粒铁水脱硫反应的模型 ·241· [6]金效，余淑仁，铁水喷粉脱硫的动力学模型研究，武汉冶金 技术，1992(6)：32 科技大学学报，1998,21(1)：22 [8]赵知样，龙貽菊，廖明，等，铁水预处理脱硫工艺参数的优 [7]Robinson S W.预测铁水脱硫剂消耗的动力学模型.武铜 化.置钢技术，2000(4)：15 Modeling of CaO particles desulfurization for hot metal LI Xia,LIU Xiangjun Mechanical Engineering School,University of Science and Technology Beijing,Beijing 100083.China ABSTRACT Detailed information of the hot metal desulfurization process is very important for develop- ment of the hot metal pre-treatment technology.A comprehensive theoretical model of CaO particles desul- furization and slag regeneration process was proposed.The reacting behavior of CaO particles was de- scribed.The effects of particle size,transfer coefficient and sulfur content on the desulphurization process were invesigated.The results show that the deduced model is feasible and can be used to study the hot met- al desulphurization reaction efficiently. KEY WORDS hot metal desulfurization;CaO particle;slag regeneration;mathematical model 素素素者津*本孝本毒本春泰本率卷率毒率*率衣春农泰春条毒*海本*春奉素本本率率豪率率率海率素率南率本素海本秦清章素背春浓章在豪者水海米系本章★者素米水泰条涂★素本素*本率率染染年来 (上接第230页) Cause analysis of cracking on the top of curved prestressed concrete bridge piers ZHANG Jubing,CAI Meifeng,MU Zaigen Civil and Environmental Engineering School.University of Science and Technology Beijing,Beijing 100083,China ABSTRACT An FEM simulation using three-dimensional beam element was performed in order to study the causes of cracking on the top of curved prestressed concrete girder bridge piers,where the prestressing tendons were simplified as forces acting on the concrete girder.The results indicate that the direction of moment on the top of a single pillar pier caused by prestressing and that caused by dead load are identical, and the former is 1 order of magnitude higher.These two moments are the main causes of cracking on the top of the piers.By comparative computation,applicable suggestions were proposed to prevent the cracking of a pier. KEY WORDS prestressed concrete;curved bridge;pier;equivalent load;cracking。 李，等 颗粒铁水脱硫反应的模型 【 金众 ， 余淑仁 铁水喷粉脱硫的动力学模型研究 武汉冶金 技术 ， 科技大学学报 ， ， 〔 赵 知祥 ， 龙贻菊 ， 廖 明 ， 等 铁 水预 处 理 脱硫工 艺参数 的优 【 」 预测铁 水脱硫剂 消耗 的动力学模 型 武钢 化 皿钢技术 ， 巧 ， 心 吧 呢 ， ， 飞 ， 一 ， 上接第 页 ， 〔滩 七 ， 叩 昭 ， 呢 ， 飞 一 ， ，