脱磷炉半钢冶金效果评价指数ISPC的应用

 为了建立评价脱磷炉半钢冶金效果的指数,在常规转炉冶金效果分析时,ISCO(Index for Selective Carbon Oxidation)指数、BOC(Balance of Oxygen and Carbon feeding rate)指数和炉渣TFe、脱磷率等冶金效果有较好的对应关系,转炉终点碳氧积可以综合考虑转炉终点碳质量分数及氧质量分数,这3个指数均可以用来衡量复合吹炼转炉冶金特性。然而在脱磷炉半钢冶炼效果并没有衡量的指数,建立选择性脱磷脱碳指数ISPC(Index for Selective dePhosphorization and deCarburization),并将该应用于脱磷炉工业生产的数据分析中,可以用来综合反映半钢冶金效果。ISPC指数越高表明脱磷保碳效果越好,半钢碳质量分数随着ISPC指数的增加而增加,半钢磷质量分数随着ISPC指数的增加而降低。半钢温度和底吹强度是影响ISPC指数的主要因素。ISPC指数随半钢温度的降低而增加,低温使得磷的氧位低于碳元素,脱磷保碳程度更好。ISPC指数随着底吹强度的增加而增加,并能较好地反映出炉底状态和动力学条件。

Application of ISPC index for performance of semisteel in dephorization furnace

In order to establish an index for evaluating the semi-steel metallurgical effect of dephosphorization furnace. In the analysis of the metallurgical effect of the conventional converter, the ISCO(Index for Selective Carbon Oxidation) index and the BOC (Balance of Oxygen and Carbon feeding rate)index have a good correspondence with the TFe of slag and the dephosphorization. The w(C)× w(O) value at the end of the converter can comprehensively consider the mass percent of carbon and the mass percent of oxygen. All three indexes above can be used to measure the metallurgical properties of converters. However, in the dephosphorization furnace, there is no comprehensive index for measuring the effect of semi-steel. the selective dephosphorization and decarburization index ISPC were established, and applies the ISPC index to industrial productions, which can be used to reflect the semi-steel metallurgy effect. When the ISPC index is higher, the dephosphorization is higher and the decarburization is lower. The carbon content of semi-steel increases with the increasing of the ISPC index. The phosphorus content of semi-steel decreases with the increasing of the ISPC index. The temperature and the bottom blowing intensity are the main factors affecting the ISPC index. The ISPC index increases with the decreasing of the temperature of the semi-steel. The low temperature makes the oxygen in equilibrium with phosphorus lower than that of carbon, and the degree of dephosphorization and carbon preservation is higher. The ISPC index increases with the increasing of the bottom blowing intensity, and can better reflect the bottom tuyere state and dynamic conditions.