摘要
采用线性尺寸为150tRH装置1/4的水模型研究了RH-PB(IJ)过程中钢液和粉剂颗粒间的传质特性,测定了液体侧的传质系数,考察提升气体流量,上升管、下降管内径和颗粒粉剂对传质系数的影响。结果表明,在上升管径和下降管径相同的情况下,增大气体流量可增大钢液与喷吹粉剂颗粒钢液侧的传质系数,但不宜增大到使环流量达到"饱和"。在现有工作条件下,传质系数为3.392×10-5~2.661×10-4m/s。在给定的增大气体流量和下降管径下,钢液与粉剂颗粒间钢液侧的传质系数随上升管径的增大而增加。当气体流量增大和上升管径给定时,钢液与粉剂颗粒间钢液侧的传质系数随下降管径的增大而减小。钢液与粉剂颗粒间钢液侧的传质系数随环流量的增大而增大。其他参数相同时,在现有工作所取范围内,粉剂颗粒的粒径越大,其与钢液间钢液侧的传质系数越大;为增大传质速率,粉剂不宜过细。
The characteristics of the mass transfer between powder particles and molten steel in the Ruhrstahl Heraeus process injection(RH-IJ)refining were simulatively investigated by the use of a 1/4 scale water model of a 150 t Ruhrstahl Heraeus(RH)degasser. The influences of the lifting gas flow rate,the up-snorkel and down-snorkel inner diameters and the size of powder particles on the characteristics of the mass transfer were examined,together with the mass transfer coefficient on the liquid side. The results s...
出处
《宝钢技术》
CAS
2010年第5期28-33,共6页
Baosteel Technology
关键词
150tRH-IJ
传质特性
传质系数
150t RH-IJ
mass transfer characteristics
mass transfer coefficient