离心中间包净化钢液的物理模拟  

PHYSICAL SIMULATION OF PURIFYING THE MOLTEN STEEL BY CENTRIFUGAL FLOW TUNDISH

作　　者：钟云波[1] 孟宪俭 任忠鸣[1] 李志华[1] 邓康[1] 徐匡迪[1] 

机构地区：[1]上海大学材料学院上海市现代冶金与材料制备重点实验室,上海200072 [2]山东莱芜钢铁股份有限公司

出　　处：《上海金属》2006年第1期14-18,共5页Shanghai Metals

基　　金：上海市科学技术委员会重点实验室产学研配套基金的资助(No.036511004)

摘　　要：采用物理模拟的方法,对离心中间包净化钢液的动力学进行了考察。采用低熔点金属液,分别考察金属液柱高度、锥度、磁感应强度、电阻率、磁场分布、屏蔽等对金属液旋转运动的影响。结果表明,增加磁感应强度、提高金属液柱深度、适当增加金属液旋转腔的锥度将有助于获得更高的金属液转速;金属液旋转速度与金属液的电阻率成反比关系。当磁感应强度为14.4mT时,钢液的转速预计可达80r/min;采用活塞流模型计算的夹杂物去除效果表明,100 r/min的钢液转速和钢液1t/min的流量下,直径20μm以上的夹杂物去除效率可以达到70%以上。The dynamics of purifying the liquid steel by centrifugal flow tundish was studied through physical simulation. Some effects upon the rotating speed by the height, diameter and cone - shape of the liquid column, flux density （MFD）, electric resistance of liquid metal, distribution of MFD and the magnetic shield were investigated by using a liquid metal with low melting point, Increasing the MFD, the height and the cone degree of liquid metal column would lead to obtain a higher rotating speed of liquid metal, which was inverse proportion to the electric resistance of liquid metal, When the MFD was 14.4mT, the rotating speed of liquid steel would reach 80 r/min by extrapolation. The estimation of inclusion removing efficiency by plug flow model showed that 70 percent of inclusions with the diameter larger than 20 btm could be removed with 100 r/min rotating speed and 1 t/min flow rate of the liquid steel.

关 键 词：离心中间包 旋转磁场 钢液净化 物理模拟 

分 类 号：TF341.6[冶金工程—冶金机械及自动化] TF777