摘要
通过建立球形熔渣凝固过程的物理和数学模型，利用现代CFD设计软件FLUENT对不同粒径渣粒的凝固过程进行了数值模拟，得到了凝固过程中渣粒和周围气体的温度场，从而确定了渣粒完全凝固的时间，为熔渣粒化和余热回收设备的设计提供了理论基础。结果表明：渣粒初始温度1823K，渣粒直径为1～3mm，冷却气体温度为373K，冷却气体流速为1—20m／s时，液态钢渣相变过程在2s内释放出80％以上的热量。说明在氮气冷却条件下，只要保证一定的冷却时间，即可保证钢渣余热回收。
The physical and mathematical models of solidification process of spherical molten steel slag granule have been established in this paper. The temperature fields of slag sphere and its outer gas could be calculated through the FLUENT software. Consequently, the solidification time of the slag sphere with different diameter could be gained. It is believed that the numerical simulated results would provide the theoretical basis for granulating molten slag and heat recovery equipment layout of molten slag. The nu- merical simulation results showed that liquid slag sphere could release more than 80% of the phasechange heat in 2 s when the initial condition as follows： the temperature of molten slag being 1 823 K, the diameter of granule being 1 - 3 mm, the temperature of cooling gas being 373 K, the velocity of gas flow being 1 -20 m/s. It is concluded that there could not be conglutination between slag spheres after a certain of cooling time if the molten steel slag has been granulated to 1 - 3 mm spheres.
出处
《钢铁钒钛》
CAS
北大核心
2010年第1期79-83,共5页
Iron Steel Vanadium Titanium
基金
国家科技支撑计划资助项目(2008BAE67B02)
973前期专项资助项目(2008CB617602)
关键词
粒化钢渣
相变
传热
温度场
凝固时间
余热回收
数值模拟
molten steel slag granular
phase change
heat transfer
temperature field
solidification time
residual heat recuperation
numerical simulation
