基于拉曼光谱的复杂硫化矿快速分类方法研究

发布时间：2018-04-30 11:55

本文选题：拉曼光谱 + 硫化矿　；参考：《光谱学与光谱分析》2017年01期

【摘要】：热液硫化物型脉状矿作为一类复杂硫化矿,其区域特征、成矿规律及矿物成份已有初步研究。由于成矿时期的不同,矿石中有用矿物的特征存在较大差异,导致不同矿物的性质变化较大。在选矿过程中,矿物性质的差异一定程度增加了选矿难度,减少了有用矿物回收率。因此,迫切需要一种快速、简单的对复杂硫化矿进行分类的方法,进而提高选矿指标。激光拉曼光谱技术作为一种能够分析物质结构信息的手段,已被应用于矿物的成份鉴定和结构分析。通过对大量矿物样本的激光拉曼光谱的研究,结合矿物性质深入揭示其光谱差异的原因,提出了一种基于拉曼光谱的复杂硫化矿矿源分类方法。实验结果表明:由于此类复杂硫化矿成矿时期的差异,从而造成矿物结构和性质存在较大差异。荧光主要由原矿中的脉石矿物产生,猝灭矿物中瞒石的荧光背景后可知201.62,242.54,288.38和309.77cm-1处拉曼峰可以作为此类硫化矿的拉曼指纹谱。为此,基于此类硫化矿的荧光强度和代表谱峰强度与荧光背景比值可以将矿源分为三类,并利用工业试验结果进一步验证分类方法的准确性。本研究深入分析了此类复杂硫化矿的激光拉曼光谱与其矿物性质与类别之间的密切关系,提出了矿源快速分类方法,矿样无需经过复杂的化学前处理过程,对提高选矿作业效率具有重要应用价值。
[Abstract]:As a kind of complex sulphide ore, hydrothermal sulphide vein ore has been preliminarily studied in terms of its regional characteristics, metallogenic regularity and mineral composition. Because of the different metallogenic periods, the characteristics of the useful minerals in the ore vary greatly, resulting in great changes in the properties of the different minerals. In the process of mineral processing, the difference of mineral properties increases the difficulty of mineral processing to some extent and reduces the recovery rate of useful minerals. Therefore, a fast and simple method for classifying complex sulphide ores is urgently needed to improve the mineral dressing index. Laser Raman spectroscopy (LRS), as a means of analyzing material structure information, has been applied to mineral composition identification and structural analysis. Based on the study of laser Raman spectroscopy of a large number of mineral samples and the reasons for the spectral difference of mineral properties, a method for classifying complex sulphide ore sources based on Raman spectroscopy is proposed. The experimental results show that the mineral structure and properties are different due to the difference of metallogenic period of the complex sulphide ore. The fluorescence is mainly produced by gangue minerals in raw ores. The Raman peaks at 201.62242.54C288.38 and 309.77cm-1 can be used as Raman fingerprints of sulphide ores after quenching the fluorescence background of the minerals. Therefore, based on the fluorescence intensity of the sulphide ore and the ratio of the peak intensity of the representative spectrum to the fluorescence background, the ore sources can be classified into three types, and the accuracy of the classification method is further verified by the industrial test results. In this study, the close relationship between the laser Raman spectra of the complex sulphide ores and their mineral properties and types is analyzed, and a fast classification method of ore source is proposed. The ore samples need not go through complex chemical pretreatment process. It has important application value to improve the efficiency of ore dressing.
【作者单位】：中南大学信息科学与工程学院;湖南师范大学工程与设计学院;
【基金】：国家自然科学基金面上项目(61473319);国家自然科学基金重点项目(61533021);国家自然科学基金创新研究群体项目(61621062) 中南大学创新驱动计划(2016CX014) 国家合作项目(2016YFE0101300)资助
【分类号】：TD91;O657.37

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