宣钢高炉合理炉料结构熔滴试验  

Rational burden structure by droplet test in Xuansteel blast furnace

作　　者：吕庆 王福佳 李豪杰 

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063009 [2]河钢集团宣钢公司,河北宣化075000

出　　处：《钢铁》2016年第6期19-25,33,共8页Iron and Steel

基　　金：国家自然科学基金资助项目(U1360205)

摘　　要：对宣钢12种含钛高炉炉料的化学成分及熔滴性能测试结果进行综合分析,给出宣钢2号高炉(2 500 m3)、3号高炉(2 000 m3)、4号高炉(1 800 m3)不同原料条件下最佳的炉料结构,并对3组炉料结构进行比较。分析认为,2号高炉熔滴性能最好的炉料结构为4号方案,S值最小为322 k Pa·℃,3号高炉熔滴性能最好的炉料结构为5号方案,S值最小为786 k Pa·℃,4号高炉熔滴性能最好的炉料结构为11号方案,S值最小为790 k Pa·℃;3号、4号高炉使用的炉料碱度与2号高炉相比较高,这是造成3号、4号高炉炉料最大压差(Δp_(max))值高的主要原因;2号高炉使用炉料的含铁品位较高,大于57%,且渣中的Mg O质量分数较低,因此炉料在软熔滴落带渣量相对较少,渣的流动性较好,熔滴性能优于3号、4号高炉。Experiments were carried out in the lab to analyze the chemical compositions of 12 kinds of titanium-containing blast furnace burden and their droplet comprehensive performance of Xuan Steel in order to determine the best burden structure of Xuan Steel No.2 blast furnace （2 500 m3）, No.3 blast furnace （2 000 m3） and No.4 blast furnace （1 800 m3） under different conditions of raw materials, and the three groups of burden structure were compared. The result showed that the best burden droplet performance was No.4 scheme for No.2 blast furnace and its S value was 322 kPa. ℃. The best burden droplet performance was No.5 scheme for No.3 blast furnace and its S value was 786 kPa. ℃ and the best burden droplet performance was No.11 scheme for No.4 blast furnace and its S value was 790 kPa· ℃. Compared with the No.2 blast furnace, the alkalinity of charge into the No,3 and No.4 blast furnace was higher which was the main reason for a higher maximum differential pressure （Apmax） for No.3 and No.4 blast furnace. With high iron content in the charge and lower mass percent of MgO in the slag, the slag amount was relatively reduced in cohesive dropping zone and the fluidity of slag became good. Hence, the droplet performance in No.2 blast furnace was better than that of No.3and No.4 blast furnace.

关 键 词：含钛高炉炉料 熔滴性能 炉料结构 

分 类 号：TF54[冶金工程—钢铁冶金]