钢渣中不同价态金属元素的化学定量分析研究进展

Research Progress in Chemical Analysis of Several Transition Metallic Elements with Various Valence States in Steelmaking Slag

在分析目前熔渣体系物相分析时物理检测的局限和化学物相分析必要性的基础上,总结化学物相分析的一般流程为:在单一元素总量分析、各价态定性和半定量分析后,确定该元素单一价态浸出分离方法或几个价态协同浸出方法,再用价态选择分析方法或差减计算方法得到元素不同价态的定量分析结果.利用此流程对比综述了目前冶金渣中不同价态铁、铬、钒、钛、铌元素化学定量分析的原理与技术进展,并分析了相关分析方法的适用条件和不足之处.提出物相转换溶出和适宜的电化学极谱分析方法可能是渣中过渡金属元素分析的趋势,但需具体体系具体分析.

Based on the limitation of present physical quantitative analysis of phases and the necessity of chemical analysis of various ions of transition metals in steelmaking slag, the general designed process of chemical phase analysis is summarized as follows： the total amount of analyzed element and its qualitative and semi-quantitative analysis at different valence states should be obtained first, then the leaching and analysis process of metal element at a mono-valence state in slag or simultaneous leaching of the meatal at different valence states is designed, and selective analytical methods or calculation will be applied in determination of its accurate amount in each state. Morever, the principle and technique progress in chemical quantitative analysis of Fe, Cr, V, Ti and Nb at various valence states in steelmaking slag are reviewed, and the advantages and disadvantages of different methods discussed. The phase transforming and dissolving methods, and electrochemical polarography would be the analysis trend of various ions of transition metals in slag. But it is necessary to analyze the specific research systems sometimes.