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石煤是提取钒的主要原料之一,为了提高钒的回收率,必须将石煤中低价钒转化为高价状态。为此,有必要建立钒的价态分析方法。石煤中钒的价态测定是一个比较困难的课题。近年来,有些单位已进行了研究,并有论文发表。我们在文献[1]的基础上,对石煤及其焙烧物中三价、四价和总钒的测定进行了一些工作,取得了较好的结果,并为工艺试验提供了所需要的数据。本文叙述了在同一份样品溶液中,用电位滴定法测定三价、四价和总钒。试样经氢氟酸
Stone coal is one of the main raw materials for extracting vanadium. In order to increase the recovery rate of vanadium, low-priced vanadium in stone coal must be converted into a high-priced state. Therefore, it is necessary to establish valence analysis of vanadium. Determination of valence of vanadium in stone coal is a relatively difficult subject. In recent years, some units have conducted research and published papers. Based on the literature [1], we have carried out some work on the determination of trivalent, tetravalent and total vanadium in stone coal and its roasted products, obtained good results and provided the necessary data for the process test . This paper describes the determination of trivalent, tetravalent and total vanadium by potentiometric titration in the same sample solution. Hydrofluoric acid sample