烧结气化脱磷过程中磷的转化及物相分析  

Phase Analysis and Phosphorus Transformation in Sintering Gasification Dephosphorization Process

作　　者：张伟[1] 王辉[1] 邢宏伟[1] 田铁磊[1] 吴礼忠[1] 刘帆[1] 

机构地区：[1]河北联合大学冶金与能源学院河北省现代冶金技术重点实验室,河北唐山063009

出　　处：《钢铁钒钛》2015年第3期78-82,共5页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金资助(51274081)

摘　　要：为了探索烧结过程中磷的转化机理,在热力学计算基础上,采用微型烧结试验,对焙烧产物进行成分检测和XRD分析。结果表明,在配碳4%、Si O21.41%、Ca Cl21.36%条件下,脱磷率最高达到20%;添加Si O2时,Ca5(PO4)3F先脱氟转化为Ca3(PO4)2,进而发生脱磷反应;添加Ca Cl2后,焙烧产物中Ca5(PO4)3F衍射峰减弱,Ca SO4衍射峰强度明显增强,同时出现Ca F2相和Ca Si O3相,结合反应式,证明气化脱磷反应发生,脱磷产物为PCl3气体。In order to explore the transformation mechanism of phosphorus during sintering process,minisintering experiment was carried out based on the thermodynamic calculation,and the component and phase of calcined product were analyzed. The results show that the dephosphorization ratio reached up to20% in the conditions of 4% carbon,1. 41% Si O2 and 1. 36% Ca Cl2; When adding Si O2,Ca5（ PO4）3F is transformed into Ca3（ PO4）2through defluorination reaction,and then dephosphorization reaction takes place. After adding Ca Cl2,the diffraction peak of Ca5（ PO4）3F decreases,while diffraction peak of Ca SO4 enhance obviously,at the same time both Ca F2 phase and Ca Si O4 phase appeare,which indicating the occurrence of gasification dephosphorization reaction with PCl3 as dephosphorization product.

关 键 词：烧结 气化脱磷 转化机理 CACL2 脱磷产物 

分 类 号：TF046.4[冶金工程—冶金物理化学]