工程科学学报，第38卷，第5期：668676,2016年5月 Chinese Journal of Engineering,Vol.38,No.5:668-676,May 2016 D0l:10.13374/j.issn2095-9389.2016.05.011:http://journals.ustb.edu.cn A山，0，和二元碱度对炼钢炉渣中磷酸盐富集机理的综 合影响 李晋岩”，张梅”，郭敏)区，杨学民》 1)北京科技大学治金与生态工程学院，北京1000832)中国科学院过程工程研究所绿色过程与工程重点实验室，北京100190 区通信作者，E-mail:guomin(@ustb.cdu.cm 摘要以六元Ca0-Si02Fe0P,0,Fe20,-Al,0,炼钢渣系为研究对象，结合热力学计算和实验检测，分析(AL,0)和二元 碱度B综合变化对该六元渣系中磷酸盐富集行为的影响.结果表明：炼钢炉渣中生成游离C,S含量对磷酸盐富集相C,$一 CP内的(P,O,)至关重要.该渣系中增加SiO2会降低总的C,S生成量，增加AL,O3可促进钙铝黄长石C,AS相生成，降低游 离C,S(fC,S)的量，进而影响磷酸盐的富集.六元Ca0SiO2Fe0P,O,Fe,0,一AL,O,炼钢炉渣获得较好磷酸盐富集程度， 渣中二元碱度B和A203含量需满足的耦合关系为：(%A山20，)=-27.70+21.62B,(AL,03)<20.0%,B>1.3. 关键词炼钢炉渣：氧化铝：碱度：磷酸盐：富集 分类号TF09 Comprehensive effect of Al,O,content and binary basicity on the enrichment mechanism of phosphates in quenched steelmaking slags lI Jin-yan',ZHANG Mei,GU0Min》,YANG Xue-min2》 1)School of Metallurgical and Ecological Engineering,University of Seience and Technology Beijing,Beijing 100083,China 2)Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China Corresponding author,E-mail:guomin@ustb.edu.cn ABSTRACT A comprehensive effect of Al,O,content and binary basicity B on the enrichment behavior of phosphates in rapidly quenched Cao-SiO,FeO-P,Os-Fe,O,-Al,O,steelmaking slags was investigated through thermodynamic calculations and experi- mental determination.It is found that the determined mass percentage of P2O in the phosphate-enriched phase nCS-C,P depends on the forming of free C.S in the steelmaking slags and increasing the SiO,content can result in an obviously decreasing tendency of formed CaS.Adding Al,O,as a dilute agent for decreasing the viscosity and melting point of the steelmaking slags can be easily bond- ed with free CaS to form a gehlenite (CAS)solid solution.Thus,adding AlO in the steelmaking slags can decrease the amount of free C.S in the steelmaking slags,which affects phosphate enrichment.In order to obtain a greater phosphate enrichment in the steel- making slags,a coupling relationship between the binary basicity B and the mass percentage of AlO in the initial steelmaking slags should be kept as (%Al2O)=-27.70+21.62B under the conditions of (Al2O3)<20.0%and the binary basicity B>1.3. KEY WORDS steelmaking slags;alumina:basicity:phosphates:enrichment 二元碱度和铁氧化物均较低的高炉炉渣已广泛用 而且因其含有一定量磷酸盐也限制其在钢铁治金现有 于水泥原料和筑路辅助原料，而二元碱度和铁氧化物 流程内的循环利用.合理利用炼钢炉渣中磷酸盐或含 均较高的炼钢炉渣在钢铁企业外资源化利用程度低， P组元，不仅对炼钢炉渣资源化利用具有理论意义，而 收稿日期：201601-31 基金项目：国家自然科学基金资助项目(51372019,51072022,50874013)工程科学学报，第 38 卷，第 5 期: 668--676，2016 年 5 月 Chinese Journal of Engineering，Vol． 38，No． 5: 668--676，May 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 05． 011; http: / /journals． ustb． edu． cn Al2 O3 和二元碱度对炼钢炉渣中磷酸盐富集机理的综 合影响 李晋岩1) ，张 梅1) ，郭 敏1) ，杨学民2) 1) 北京科技大学冶金与生态工程学院，北京 100083 2) 中国科学院过程工程研究所绿色过程与工程重点实验室，北京 100190  通信作者，E-mail: guomin@ ustb． edu． cn 摘 要 以六元 CaO--SiO2 --FeO--P2O5 --Fe2O3 --Al2O3 炼钢渣系为研究对象，结合热力学计算和实验检测，分析( Al2O3 ) 和二元 碱度 B 综合变化对该六元渣系中磷酸盐富集行为的影响． 结果表明: 炼钢炉渣中生成游离 C2 S 含量对磷酸盐富集相 nC2 S-- C3P 内的( P2O5 ) 至关重要． 该渣系中增加 SiO2 会降低总的 C2 S 生成量，增加 Al2O3 可促进钙铝黄长石 C2AS 相生成，降低游 离 C2 S ( f--C2 S) 的量，进而影响磷酸盐的富集． 六元 CaO--SiO2 --FeO--P2O5 --Fe2O3 --Al2O3 炼钢炉渣获得较好磷酸盐富集程度， 渣中二元碱度 B 和 Al2O3 含量需满足的耦合关系为: ( % Al2O3 ) = － 27. 70 + 21. 62B，( Al2O3 ) ＜ 20. 0% ，B ＞ 1. 3． 关键词 炼钢炉渣; 氧化铝; 碱度; 磷酸盐; 富集 分类号 TF09 Comprehensive effect of Al2O3 content and binary basicity on the enrichment mechanism of phosphates in quenched steelmaking slags LI Jin-yan1) ，ZHANG Mei 1) ，GUO Min1)  ，YANG Xue-min2) 1) School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Key Laboratory of Green Process and Engineering，Institute of Process Engineering，Chinese Academy of Sciences，Beijing 100190，China  Corresponding author，E-mail: guomin@ ustb． edu． cn ABSTＲACT A comprehensive effect of Al2O3 content and binary basicity B on the enrichment behavior of phosphates in rapidly quenched CaO--SiO2 --FeO--P2O5 --Fe2O3 --Al2O3 steelmaking slags was investigated through thermodynamic calculations and experi￾mental determination． It is found that the determined mass percentage of P2O5 in the phosphate-enriched phase nC2 S--C3P depends on the forming of free C2 S in the steelmaking slags and increasing the SiO2 content can result in an obviously decreasing tendency of formed C2 S． Adding Al2O3 as a dilute agent for decreasing the viscosity and melting point of the steelmaking slags can be easily bond￾ed with free C2 S to form a gehlenite ( C2AS) solid solution． Thus，adding Al2O3 in the steelmaking slags can decrease the amount of free C2 S in the steelmaking slags，which affects phosphate enrichment． In order to obtain a greater phosphate enrichment in the steel￾making slags，a coupling relationship between the binary basicity B and the mass percentage of Al2O3 in the initial steelmaking slags should be kept as ( % Al2O3 ) = － 27. 70 + 21. 62B under the conditions of ( Al2O3 ) ＜ 20. 0% and the binary basicity B ＞ 1. 3． KEY WOＲDS steelmaking slags; alumina; basicity; phosphates; enrichment 收稿日期: 2016--01--31 基金项目: 国家自然科学基金资助项目( 51372019，51072022，50874013) 二元碱度和铁氧化物均较低的高炉炉渣已广泛用 于水泥原料和筑路辅助原料，而二元碱度和铁氧化物 均较高的炼钢炉渣在钢铁企业外资源化利用程度低， 而且因其含有一定量磷酸盐也限制其在钢铁冶金现有 流程内的循环利用． 合理利用炼钢炉渣中磷酸盐或含 P 组元，不仅对炼钢炉渣资源化利用具有理论意义，而