Titration is often used to determine the iron grade in sulfide ores. In this method, HCl is used as the main solvent. If the ore contains iron sulfide minerals, such as pyrite, it cannot be completely dissolved in HCl, and the measurements error will be high. Therefore, roasting is used to determine the iron grade in such cases. But roasting requires special equipment and it is usually time consuming. On the other hand, while HNO 3 can dissolve sulfide minerals, the results often contain a high measurement error due to remaining acid during titration. In this study, a new method to determine the iron grade in iron sulfide ores was proposed by using perchloric acid. The iron grade of a high pyrite-containing ore was determined by the new method, and the results were compared to those obtained by the traditional roasting or HNO 3 titration. The new method was found to provide iron grade values close to the roasting method. The proposed method was tested on a number of samples with known iron grades. Results showed 0.999 determination coefficient ( R 2 ) suggesting this method is reliable and it can be used to analyze iron grade in sulfide mineral-containing ores.

中文翻译：

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确定含有硫化矿物的矿石或精矿的铁品位

滴定常用于确定硫化矿中的铁品位。在该方法中，HCl 用作主要溶剂。如果矿石中含有硫化铁矿物，如黄铁矿，在HCl中不能完全溶解，测量误差较大。因此，在这种情况下，使用焙烧来确定铁的品位。但烘烤需要特殊设备，而且通常很耗时。另一方面，虽然 HNO 3 可以溶解硫化物矿物，但由于滴定过程中残留的酸，结果通常包含很高的测量误差。本研究提出了一种利用高氯酸测定硫化铁矿石中铁品位的新方法。采用新方法测定高黄铁矿铁品位，并将结果与​​传统焙烧法或HNO 3 滴定法进行比较。发现新方法可提供接近焙烧方法的铁品位值。建议的方法在具有已知铁品位的多个样品上进行了测试。结果表明，测定系数(R 2 )为0.999，表明该方法可靠，可用于含硫化矿物矿石中铁品位的分析。