摘要
运用动力学理论对白钨矿粉的熔化还原过程和渣中 WO3的还原过程进行了计算和分析。结果表明 :白钨矿粉在钢液中的熔化还原是白钨矿粉还原过程的关键环节。在高温电弧作用下 ,白钨矿粉的熔化还原速率很快。为了加速白钨矿粉的熔化还原 ,白钨矿粉应放在炉底并远离炉壁。渣中 WO3的扩散是其还原过程的限制性环节 ,它与渣中 WO3的传质系数及反应界面有关 ,改善渣的流动性及扩大反应界面能加快 WO3的还原过程。
The processes of melting and reduction of scheelite powder and reduction of WO 3 were calculated and analyzed by means of kinetic theory. The results showed that melting and reduction of scheelite powder in molten steel are the key steps of reduction process for scheelite powder. The melting and reduction of scheelite acted by high temperature electric arc are very fast. The scheelite powder should be added at the bottom of EAF far away the wall of furnace for accelerating the process of melting and reduction of scheelite powder. The diffusion of WO 3 is the restrictive step of reduction process of WO 3. The reduction process is related to coefficient of mass transfer of WO 3 and area of reaction interface. The improving fluidity of slag and enlarging area of reaction interface can accelerate reduction process of WO 3.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2000年第4期10-13,共4页
Journal of Iron and Steel Research
关键词
炼钢
白钨矿
熔化
还原
动力学
steelmaking
scheelite
melting
reduction
kinetics
