Abstract

Elemental analysis of ferromanganese formations (first of all, the determination of ore elements) is a necessary stage in the development of ore deposits. A technique for X-ray fluorescence quantitative analysis was proposed for the determination of iron, manganese, cobalt, nickel, copper, and zinc in oceanic ferromanganese formations (nodules and crusts). The studies were performed using a S4 Pioneer wavelength-dispersive spectrometer equipped with a LiF (200) crystal and a scintillation detector. In order to plot the calibration curves, sets of certified reference materials such as ferromanganese nodules, cobalt-bearing ferromanganese crusts, and pelagic sediments previously dried at 105°C for 24 h to remove hygroscopic moisture were used. Two sample preparation techniques were compared: pressing of powder samples with the use a boric acid substrate and homogenizing via fusion with lithium tetraborate at a ratio of 1 : 30 in an electric furnace at 1050°C. For each sample preparation technique, spectral overlaps and matrix correction methods (theoretical and empirical) were considered, and optimal calibration curves for determining ore elements were chosen. The accuracy of the X-ray fluorescence technique was assessed via analyzing a reference material FeMn-1 with a certified content of ore elements and a reference ferromanganese nodule sample preliminarily analyzed using a PerkinElmer M403 atomic absorption spectrometer. Both homogenization via fusion and analysis of pressed samples provide quantitative X-ray fluorescence determination of the main ore elements and can be used to assess the industrial significance of oceanic ferromanganese formations.

中文翻译：

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X射线荧光法测定锰铁矿中矿石元素

摘要

铁锰形成的元素分析（首先是确定矿石元素）是矿床开发中的必要阶段。提出了一种用于X射线荧光定量分析的技术，用于测定海洋锰铁地层（结核和结壳）中的铁，锰，钴，镍，铜和锌。使用配备有LiF（200）晶体和闪烁检测器的S4 Pioneer波长色散光谱仪进行研究。为了绘制校准曲线，使用了一组经过认证的参考材料，例如锰铁结核，含钴的锰铁结壳和预先在105°C下干燥24小时以去​​除吸湿性的浮游沉积物。比较了两种样品制备技术：使用硼酸基质压制粉末样品，并在1050°C的电炉中通过以1:30的比例与四硼酸锂熔融而均质化。对于每种样品制备技术，均应考虑光谱重叠和基质校正方法（理论和经验），并选择确定矿石元素的最佳校准曲线。X射线荧光技术的准确性是通过使用PerkinElmer M403原子吸收光谱仪分析具有矿物质含量的参考材料FeMn-1和参考的锰铁结核样品进行初步评估的。