RH精炼过程中合金熔化混匀现象的水模型研究  

Water Model Study on Alloy Melting and Mixing in RH Refining Process

作　　者：许智博 陈超[1] 王佳 李怡宏[3] 曹瑞云 赵岩松 薛利强 范晋平 XU Zhibo;CHEN Chao;WANG Jia;LI Yihong;CAO Ruiyun;ZHAO Yansong;XUE Liqiang;FAN Jinping(a.College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan,Shanxi,China;College of Architecture&Art,Taiyuan University of Technology,Taiyuan,Shanxi,China;School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan,Shanxi,China;No.2 Steelmaking Plant,Shanxi Taigang Stainless Steel Co.,Ltd.,Taiyuan,Shanxi,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原 [2]太原理工大学建筑与艺术学院,山西太原 [3]太原科技大学材料科学与工程学院,山西太原 [4]山西太钢不锈钢股份有限公司炼钢二厂,山西太原

出　　处：《太原理工大学学报》2025年第1期88-97,共10页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(51904204);中央引导地方科技发展资金项目(YDZJSX2022C028);山西省基础研究计划面上项目(20210302123218);山西省大学生创新创业计划项目(20220118)。

摘　　要：【目的】在RH精炼处理的不同阶段,根据需要会加入大量合金,以调整钢液成分,其在RH中的运动、熔化及均匀分布,决定了精炼过程的生产节奏。【方法】通过水模型实验与数值模拟,研究了NaCl饱和溶液与NaCl颗粒分别作为示踪物质,在RH装置内的传输过程及混匀现象。以KCl溶液冷冻制备的盐球类比重型合金,研究其由真空室顶部进入RH后的运动及混匀过程。【结果】结果表明:颗粒与溶液在各点处的无量纲浓度曲线变化趋势一致,颗粒方案的响应时间和第一峰值时间略晚于溶液方案,第一峰值浓度也较低,这和颗粒溶解过程有关。当溶液体积或颗粒质量增加后,在下降管出口处盐水溶液的浓度曲线第一峰浓度较大且峰值时间较短。颗粒作为示踪物质时的混匀时间均远高于(接近2倍)同等盐分溶液的方案。在RH加入盐球时,其在真空室底部短暂停留后流入下降管,随后停留在钢包底部直至融化,期间缓慢释放盐分,使得钢包底部区域达到混匀的时间较长。在实际RH精炼过程中,加入重型难熔合金后,应注意钢包底部区域物质的混合规律。【Purposes】At different stages of RH refining process,a large weight of alloys are added to adjust the composition of steel.The motion,melting,and mixing of alloy in RH determine the production rate of refining process.【Methods】The transport process and mixing phenomenon of NaCl saturated solution or NaCl particles in water model of RH were studied by water model experiment and numerical simulation.The salt spheres made by KCl solution were used to simulate the heavy alloy,and the motion and mixing process after entering RH from the top of vacuum chamber in the water model was studied.【Findings】The results show that the dimensionless concentration-time curves of the schemes of particles and solution are consistent at each monitor point.The response time and the first peak time of the particle scheme are slightly later than those of the solution scheme,and the first peak concentration of the partide scheme is also lower.This is due to the dissolution process of particle.When the volume of the solution or the mass of particle increases,the first peak concentration of the scheme of salt solution at the outlet of the down-snorkel is larger and the peak time is shorter.The mixing time of schemes of particles is much higher(nearly twice)than that of the schemes of solution with the same salinity.When the salt sphere is added to RH,it flows into the down-snorkel after a short time period stay at the bottom of the vacuum chamber,and then stays at the bottom of the ladle until melting.During the melting period,the salt substance is slowly released,so that the mixing time at the bottom of ladle is longer.In the actual RH refining process,after adding heavy alloy that is difficult to melt,it is essential to pay attention to the mixing mechanisms of the substances at the bottom area of the ladle.

关 键 词：合金 RH 水模型 熔化 混匀 

分 类 号：TF769.2[冶金工程—钢铁冶金]