新型铁水颗粒镁脱硫喷枪的研究

Study on a New Injection Lance for Molten Iron Desulphurization by Granular Magnesium

针对目前铁水镁脱硫喷枪结构单一及使用中枪体振动易引起气体逸出不均匀、喷溅较大等问题,通过水模型物理模拟和数值模拟,设计了一种汽化室带侧孔的新型脱硫喷枪。研究结果表明:设计喷枪喷吹时,气体从汽化室逸出连续均匀,气泡在液相中分布均匀弥散,且停留时间与原喷枪相当,液面波动较平稳均匀。工业试验结果表明:使用新型喷枪可降低镁耗23.3%,显著提高脱硫剂的利用率和脱硫效率。喷枪使用时喷溅较小,寿命与原喷枪相当。

For enriching the type of injection lance and modifying the problem of gas asymmetry from injection lance,strong splash and so on in the process of desulphurization in molten iron by magnesium,a new type of lance which had side outlets on vaporizing chamber was designed.Physical and numerical simulation results show that gas spurts out from outlets continuously and symmetrically in the process of injection by designed lance,gas bubbles evenly and dispersedly distributes in the top of liquid and its residence time are equivalence with prototype lance,meanwhile,liquid level fluctuates stably and evenly.Pilot test results show that the application of new lance can reduce 23.3% of the consumption of magnesium [kg（Mg）/kg（S）],and improve the utilization of desulphurizer and the efficiency of desulphurization evidently.The fluctuation of liquid level can be attenuated and the longevity can be kept.