气淬渣滴冷却过程数值模拟研究  

Numerical Simulation on Cooling Dynamics of Slag Droplet Granulated by Gas Quenching

作　　者：卢宏伟[1] 李俊国[1] 张玉柱[1] 

机构地区：[1]河北联合大学河北省现代冶金技术重点实验室,河北唐山063009

出　　处：《钢铁钒钛》2012年第3期28-33,共6页Iron Steel Vanadium Titanium

基　　金：973专项资助项目(2008CB617602);国家科技支撑计划资助项目(2008BAE67B00)

摘　　要：液态钢渣气淬后将经历复杂的冷却凝固过程。采用Fluent软件对渣滴冷却过程动力学进行了数值模拟,并与数值计算结果相比较。研究结果表明:渣滴冷却经历液相冷却、潜热释放和固相冷却三个阶段;在没有考虑过冷度的情况下,Fluent软件模拟出液态冷却耗时较短,而潜热释放和固相冷却耗时较长;Fluent数值模拟能更形象地展示渣滴凝固形壳过程,数值计算更能准确地计算液相冷却、潜热释放和固相冷却等各阶段所消耗的时间;综合来看,Fluent数值模拟和数值计算两种方法均可准确预测出渣滴由1 723 K冷却至1 073 K所需要的时间,从而为液态钢渣气淬工艺提供理论基础。Steel slag droplets will experience a complex process of cooling and solidification after they are granulated by gas quenching.Numerical simulation for cooling dynamics of slag droplets is carried out by Fluent software.The simulation result is compared with that obtained from numerical calculation.It is suggested that the slag droplet undergoes three cooling phases including liquid cooling,release of latent heat and solid cooling.Without considering subcooling degree during solidification of the slag droplet,the consuming time during liquid cooling phase is short through Fluent simulation,while those during release of latent heat and solid cooling phase are long.The shell formation process can be simulated through Fluent software,while the consuming time during liquid cooling,release of latent heat and solid cooling phase can be calculated by numerical calculation.In summary,the total consuming time for cooling from 1 723 K to 1 073 K can be predetermined accurately by both Fluent numerical simulation and numerical calculation,which lay a theoretical foundation for gas quenching process of molten steel slag.

关 键 词：液态渣滴 冷却 数值模拟 数值计算 

分 类 号：X757[环境科学与工程—环境工程]