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《Engineering Science》 2007-01
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Fundamental Research on Vanadium Recovering from V-bearing Steelmaking Slag

Dong Yuanchi~1,Wu Xingrong~(1,2),Yu Liang~(1,2),Li Liaosha~1(1.Anhui Provincial Key Laboratory for Metallurgical Engineering & Resources Recycling,Anhui University of Technology,Maanshan,Anhui 243002,China;2.Metallurgical and Ecological Engineering School,University of Science and Technology Beijing,Beijing 100083,China)  
The enrichment of vanadium and crystallization and growth of V-concentrating phase in V-bearing steelmaking slag are studied by adding SiO_2 and Al_2O_3 with the method of melting-cooling.The results show that when 15% SiO_2 and 20% Al_2O_3 are added in slag,respectively,vanadium can be enriched in solid solution of Ca_3[(V,P,Si)]O_4]_2 from the original phases of 2CaO·SiO_2(C_2S) and 2CaO·Fe_2O_3(C_2F).The contents of V_2O_5 in Ca_3[(V,P,Si)]O_4]_2 reach 24.38% and 14.90%,respectively.It is demonstrated that when the slag is added by Al_2O_3,V-concentrating phase can nucleates homogeneously at(1 325 ℃)and heterogeneously at(1 350 ℃.) When holding at crystallization temperature of(1 300 ℃,)the crystals of V-concentrating phase grow from mean diameter of 6.28 μm for 5min to 25.19 μm for 580 min,and the number of crystals per unit area is decreasing.
【Fund】: 国家自然科学基金资助项目(50574003)
【CateGory Index】: X757
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