Comparative study on mineralogy and beneficiation potential of western Crete iron ores

IF 0.9 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Applied Earth Science-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-09-17 DOI:10.1080/25726838.2020.1817711

A. Stratakis, E. Petrakis, Nikolaos Katzagiannakis, G. Alevizos

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Abstract

ABSTRACT This study aims to investigate and compare the mineralogical characteristics of the western Crete iron ores in the Kakopetros and Arolithi areas. In addition, conventional beneficiation techniques, namely, magnetic and heavy liquid separation, were examined in order to potentially upgrade these ores. The ores were characterized through X-ray diffraction, X-ray fluorescence, Scanning electron microscopy and ore microscopy. Kakopetros iron ore consists mainly of compact goethite masses, while cryptomelane in the form of concentric shells was observed in several samples. Arolithi ore consists of several compact masses of goethite and fine-grained graphite and pyrite which are dispersed in the groundmass. Conventional beneficiation of specific fractions indicated that the heavy liquid treatment of the 0.063-0.250 mm size fraction of the Kakopetros ore resulting in a significant increase in upgrading. Overall, the results showed that fine-grained gangue minerals are locked in the iron-rich masses, making the separation techniques of ores ineffective.

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克里特岛西部铁矿矿物学及选矿潜力比较研究

摘要本研究旨在研究和比较克里特岛西部Kakopetros和Arolithi地区铁矿石的矿物学特征。此外，还研究了传统的选矿技术，即磁选和重液分离，以期对这些矿石进行潜在的升级。通过x射线衍射、x射线荧光、扫描电镜和矿石显微镜对矿石进行了表征。Kakopetros铁矿主要由致密针铁矿块体组成，而在几个样品中观察到以同心壳形式存在的隐褐铁矿。Arolithi矿石由几个致密的针铁矿、细粒石墨和黄铁矿组成，它们分散在地质体中。特定馏分的常规选矿表明，对Kakopetros矿石0.063-0.250 mm粒度馏分进行重液处理可显著提高升级率。综上所述，细粒脉石矿物被锁在富铁岩体中，使矿石分离技术失效。

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来源期刊

Applied Earth Science-Transactions of the Institutions of Mining and Metallurgy GEOSCIENCES, MULTIDISCIPLINARY-

CiteScore

1.70

自引率

10.00%

发文量