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我国有着丰富的钒钛磁铁矿资源,五氧化二钒含量从原矿0.2%富集到熔化渣2%,再富集到高钒渣38%左右.人们熟知:钒对测定全铁的正干拢,主要是由于二氯化锡或三氯化钛作还原剂时,部份钒被还原为钒(Ⅲ),钒(Ⅲ)消耗重铬酸钾标液所致.本文提出钨蓝还原重铬钾法测定全铁,不用汞盐,干扰离子少,尤其对钒渣样品,无须分离钒,直接测定全铁.方法具有简便、快速、准确、适合范围广等优点.
China is rich in vanadium-titanium magnetite resources, vanadium pentoxide content enriched from 0.2% of ore to 2% of molten slag, and then enriched to about 38% of high vanadium slag.It is well known: vanadium for the determination of the total iron is dry It is mainly due to the fact that part of vanadium is reduced to vanadium (Ⅲ) and vanadium (Ⅲ) consumes potassium dichromate solution when tin dichloride or titanium trichloride is used as reducing agent. Chromium and potassium method for the determination of total iron, mercury salt, less interference ions, especially for vanadium slag samples, without separation of vanadium, direct determination of total iron method is simple, fast, accurate, suitable for a wide range of advantages.