【摘要】 针对攀西地区铁水/半钢预脱硫效果差异的问题,理论分析了脱硫前后炉渣成分以及物相对脱硫的影响。分析结果表明,脱硫后渣中硫含量为高炉渣/提钒渣的4～5倍,脱硫渣中硫以CaS的形式存在,未发现MgS;半钢脱硫渣平均CaO含量较铁水脱硫渣少15%,FeO含量多9%;铁水预脱硫后渣中低熔点物相含量较少,主要是mCaO·nAl₂O₃（<1 400℃）,半钢脱硫渣中低熔点物相含量较多,主要是FeO（1 369℃）。增加脱硫剂喷入量,可以提高脱硫渣的固硫能力,减少回硫的发生。高炉渣和提钒渣作为顶渣进入预脱硫工序的渣量（以100 t铁水计）均在1～2 t。更多还原

【Abstract】 Effects of the chemical compositions and phases of the slags on desulphurization of molten iron and semi-steel were studied.Sulfur content in the desulfurized slag is 4～5 times higher than those of BF slag and vanadium-extracting slag.Sulfur exists in the form of CaS in the desulfurization slag,no MgS has been found.The average content of CaO in the semi-steel desulfurization slag is 15% less than that in the molten iron desulfurization slag,but FeO content is 9% more than that of later slag.The low melting point phases are few in the slag aftrer molten iron desulfurizationand mainly are mCaO·nAl₂O₃（<1 400 ℃）.But for semi-steel desulfurization the low melting point phases has much higher content in the slag,mainly are FeO（1 369 ℃）.Increasing desulfurizer injection amount can improve the sulfur control capacity of desulfurization slag,reducing resulfurization.BF slag as the top slag in the molten iron desulfurization process is 0.01～0.02 t/t,and the same as for vanadium-extracting slag.更多还原