Enrichment Mechanism of Phosphate in CaO-SiO2-FeO-Fe2O3-P2O5 Steelmaking Slags

被引：44
作者：
Li, Jin-Yan [1 ,2 ]
Zhang, Mei [1 ,2 ]
Guo, Min [1 ,2 ]
Yang, Xue-Min [3 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
[3] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2014年 / 45卷 / 05期
基金：
中国国家自然科学基金;
关键词：
QUASI-CHEMICAL MODEL; FEO-CONTAINING SLAGS; THERMODYNAMIC ACTIVITIES; DEPHOSPHORIZATION SLAG; MAGNETIC SEPARATION; CAO-SIO2-FETO SLAGS; IRON-OXIDE; 1573; K; PHOSPHORUS; PHASE;
D O I：
10.1007/s11663-014-0085-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The phosphate-enrichment behavior has experimentally been investigated in CaO-SiO2-FeO-Fe2O3-P2O5 steelmaking slags. The reaction ability of structural units in the slags has been represented the mass action concentration from the developed ion and molecule coexistence theory (IMCT)- model based on the IMCT. The defined enrichment possibility and enrichment degree of solid solutions containing P2O5 from the developed IMCT- model have been verified from the experimental results. The effects of binary basicity, the mass percentage ratio , and mass percentage of P2O5 in the initial slags on phosphate-enrichment behavior in the slags has also been discussed. The results show that the P2O5 component can easily be bonded by CaO to form tricalcium phosphate 3 CaO center dot P2O5, and the formed 3CaO center dot P2O5 can react with the produced dicalcium silicate 2CaO center dot SiO2 to generate solid-solution 2CaO center dot SiO2-3CaO center dot P2O5 under fixed cooling conditions. The maximum value of the defined enrichment degree of solid-solution 2CaO center dot SiO2-3CaO center dot P2O5 is obtained as 0.844 under conditions of binary basicity as 2.5 and the mass percentage ratio as 0.955 at fixed cooling conditions.
引用
收藏
页码：1666 / 1682
页数：17
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