KR铁水脱硫剂逸散及搅拌器黏渣分析

 为进一步提高KR机械搅拌铁水脱硫效率,对KR机械搅拌铁水脱硫时脱硫剂加入过程中的逸散和搅拌器叶桨上方黏结渣块产生原因进行分析。结果表明,脱硫剂粒度和成分、加料方式、铁水带渣是引起加料逸散和搅拌器黏结渣块的主要原因。采取控制脱硫剂粒度小于0.1 mm的比例小于10%、控制加料时的搅拌速度不大于40 r/min、优化萤石粒度避免脱硫剂中局部CaF₂质量分数高、采取脱硫前扒除铁水带渣等方法,有效改善脱硫剂逸散和搅拌器黏渣,进而提高脱硫剂的利用率和铁水脱硫率。

Analysis of KR hot metal desulfurizer escaped and slag agglomeration in agitator

In order to further improve the hotmetal desulfurization efficiency by the KR mechanical stirring,the escape of desulfurizer in the process of hotmetal desulfurization by the KR mechanical stirring and the slag block on the upper blade of the agitator were analyzed. The results show that the particle size and composition of desulfurizer, the feeding mode, and slag from hot metal are the main reasons for the additive escape and the slag agglomeration in the agitator. By controlling the proportion of desulfurizer particle size <0.1 mm to less than 10%, controlling the stirring speed during feeding at ≤40 r/min, optimizing the size of fluorite to avoid high local CaF₂content in desulfurizer and removing slag from hotmetal before desulphurization, which can effectively improve the desulfurizer escape and the slag agglomeration in the agitator, thereby improving the utilization rate of desulfurizer and desulfurization rate of hot metal.