论文部分内容阅读
从含少量铌、较高的锰和磷的铁水中回收铌,是复杂的选择氧化过程。通过热力学和动力学条件的理论分析及实验,表明利用氧气底吹转炉对这种铁水进行处理,将终点温度控制在估算的铌-碳选择氧化临界温度1350℃—1400℃内,和掌握合适的氧流冲击力及氧流在熔池内的贯穿长度,可以成功地将铁水中的铌和锰最大限度地氧化到渣中,而将碳和磷基本上保留在金属中,以达综合利用。
The recovery of niobium from hot metal containing a small amount of niobium, higher manganese and phosphorus is a complex selective oxidation process. Through the theoretical analysis and experiments of thermodynamic and kinetic conditions, it is shown that this hot metal is treated with an oxygen bottom-blown converter and the end temperature is controlled within the estimated critical temperature of niobium-carbon selective oxidation of 1350 ℃ -1400 ℃, The impact of oxygen flow and the penetration length of oxygen flow in the molten pool can successfully maximize the oxidation of niobium and manganese in the molten iron to the slag, while the carbon and phosphorus are basically retained in the metal for comprehensive utilization.