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mineralogical characterization and pretreatment for antimony extraction by ozone of antimony-bearing refractory gold concentrates

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Transactions of Nonferrous Metals Society of China 2017年第8期27卷 1889-1896页

作者： Xue-yi GUO Yun-tao XIN Hao WANG Qing-hua TIAN School of Metallurgy and Environment Central South University Changsha 410083 China Cleaner Metallurgical Engineering Research Center China Nonferrous Metals Industry Association Changsha 410083 China

The mineralogical characterization of antimony-bearing refractory gold concentrates and the antimony extraction by ozonein HCl solution were *** mineralogical study shows that there exist stibnite(Sb2S3),arsenopyrite(FeAsS),pyrite(FeS2)and quartz in the concentrates,and the gold is mainly(67.42%)encapsulated in *** antimony extraction by ozone inhydrochloric acid was employed and the influences of temperature,liquid/solid ratio,HCl concentration and stirring speed on theextraction of antimony were *** antimony extraction(93.75%)is achieved under the optimized *** thepretreatment by ozone,the antimony is recovered efficiently and the gold is enriched in the leaching residue.

关键词： antimony-bearing refractory gold concentrates ozone pretreatment mineralogical characterization antimony extraction

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Integration of SEM/WDX elemental mapping and micromorphology to determine mineralogical traits of peat soils(case study：Northern Iran)

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Acta Geochimica 2017年第2期36卷 298-315页

作者： Milad Kurdi Taymor Eslamkish Department of Mining and Metallurgical Engineering Tehran Polytechnic Amirkabir University Tehran Iran Department of Organic and Ecological Chemistry Tyumen State University Tyumen Russia

We explored the potential use of combining wavelength-dispersive X-ray spectroscopy(WDX) and micromorphology of thin sections to identify minerals in peat soils. Peat soil minerals from three peats and swamps across Golestan Province in northern Iran were first characterized by micromorphological studies. Soils were composed mainly of quartz, muscovite, biotite, pyroxene,sericitized Fe-nodules, and iron-rich garnet. In addition,micromorphological results indicated that Galougah Coastal Swamp sections contained some inorganic residue with biological origin including oyster and limpet, which may be related to the swamp's location near Gorgan *** order to determine mineralogical properties of samples,twelve unknown grains were chosen for elemental concentration map studies. Quartz, garnet, ilmenite, calcite,and pyroxene in Suteh samples; epidote and Fe-nodule in Ghaleh-Ghafeh Peat Swamp; and barite, phyllosilicates,and calcite in Galougah were identified by WDX mapping of Si, Al, Fe, Ca, Mg, C, Ba, S, and Ti. Composition of the oysters' body was also analyzed by WDX for Si, Ca, Fe,and C. The results indicated that most of the minerals in all sections likely formed through weathering, inheriting their composition from the parent rock. This research suggests that merging micromorphology and SEM/WDX image techniques can be useful in confirming the presence of mineral particles in soil science.

关键词： Elemental mapping Micromorphology mineralogical characterization Peat and swamp soil SEM/WDX

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