铁水包顶底喷粉脱硫对比试验研究

通过狭缝式喷粉透气砖底喷吹和常规喷枪顶喷吹两种方式,将电石基粉喷入20 t铁水包中对含镍铁水进行脱硫对比试验.结果表明：在每吨铁脱硫粉剂消耗量为4 kg铁条件下,底喷粉工艺脱硫率为81%~90%,铁水温降为23~36℃;顶喷粉工艺脱硫率为59%~73%,铁水温降为45~70℃.顶、底喷粉处理时间无明显区别,底喷粉处理总时间始终比顶喷粉处理时间短约5 min.底喷吹脱硫工艺具有脱硫效率高、铁水温降小、处理周期短等优点.

Comparative Study of Desulphurization with Powder Injected into Hot Iron Through Lance and Slot Porous Plug

A comparative experimental study on desulphurization of hot iron with nickel by injecting powder through slot porous plug fixed at the bottom of ladle and a usual overhead injecting technology was carried out in an industrial 20 tones ladle.The results showed that when the consumption of calcium carbide powder is 4 kg/t,the desulphurization ratio of the bottom powder injection is 81%～90%,and the heat loss is 23～36 ℃;the desulphurization ratio of overhead powder injection is 59%～73% and the heat loss is 45～70 ℃.Although the difference of injecting time between them can be neglected,the total processing time of bottom injection technology is 5 min shorter than that of top injection technology.Therefore,compared with the other desulphurization technologies,the technology of injecting powder with the bottom position has a number of advantages,such as,the higher desulphurization efficiency,the less heat loss and the short recycle time.