铁矿石总铁含量的测定第2部分:氯化钛（III）还原后的滴定法

[中文适用范围]： 本标准规定了采用氯化锡(II)和氯化钛(III)还原铁(III)后，以重铬酸钾为滴定剂，测定铁矿石中总铁含量的两种无汞污染的滴定方法。 然后用稀重铬酸钾（方法 1）或高氯酸（方法 2）氧化过量的还原剂。 两种方法均适用于天然铁矿石、铁精矿和团矿（包括烧结产品）中铁质量分数为30%至72%的浓度范围。 [外文原描述]： This document specifies two titrimetric methods, free from mercury pollution, for the determination of total iron content in iron ores, using potassium dichromate as titrant after reduction of the iron(III) by tin(II) chloride and titanium(III) chloride. The excess reductant is then oxidized by either dilute potassium dichromate (Method 1) or perchloric acid (Method 2). Both methods are applicable to a concentration range of 30 % mass fraction to 72 % mass fraction of iron in natural iron ores, iron ore concentrates and agglomerates, including sinter products.