高炉含钒铁水喷吹CO2直接冶炼半钢的研究

Research on Directly Smelting Semi-steel by Blowing CO2 into Blast Furnace Vanadium-bearing Molten Iron

通过对喷吹CO2直接冶炼高炉含钒铁水脱碳保钒体系进行热力学分析和试验研究,结果表明,利用CO2吹炼脱碳保钒是可行的。标准状态下,脱碳保钒转化温度为1 630 K。得出适宜试验条件为气体流量为0.6 L/min,通气时间为80 min,冶炼温度1 550℃,CO2浓度为70%,脱碳率达到95.6%,钒含量略微上升。

The thermodynamics analysis and experimental investigation had been conduct on the system of decarbonization and vanadium protection by blowing CO2 to smelt vanadium-bearing hot metal.The results show that it is feasible to remove carbon and keep vanadium by CO2 blowing.In standard state,the transformation temperature of decarbonization and vanadium protection is 1 630 K.The experimental results show that the optimum conditions are as follows: gas flow rate is 0.6 L/min,ventilation time is 80 min,smelting temperature iss 1 550 ℃,CO2 concentration is 70%.Under these conditions the decarburization rate can reach 95.6%,and the vanadium content increases slightly.