نوع مقاله : علمی-پژوهشی
نویسندگان
1 دانشجوی دکتری، گروه مهندسی معدن، دانشکده مهندسی، دانشگاه کاشان، کاشان
2 دانشیار، دانشکده مهندسی معدن، دانشگاه صنعتی امیرکبیر، تهران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The present study aims to identify and quantify the textural characteristics of granulated iron ore tailing depots to investigate these characteristics' effect on the tailings reprocessing behavior. After sampling from the tailings depots and classifying them into six size fractions, chemical analyses, and optical and electron microscopic studies were conducted on each fraction. By processing the images and coding in MATLAB software, a quantitative parameter related to the interlocking of the target mineral with gangues—termed the association index (AI)—was determined. Mineralogical studies indicate the presence of magnetite and hematite, along with their complex interlocking with other metallic minerals and gangue. Based on the AI calculated for each fraction, the highest interlock occurs between magnetite and hematite, attributed to the martitization of magnetite to hematite. In the size fraction above 250 microns, the highest AI is observed for magnetite with the following minerals: calcite, diopside, garnet, and quartz. In this fraction, the ratio of AI to the grades of pyrite and chalcopyrite exceeds 1, indicating that magnetite is preferable to these minerals. The magnetic separation results confirmed that pyrite and chalcopyrite were recovered into the magnetic concentrate in sizes over 250 microns. This can significantly aid in copper mineral recovery as a pre-treatment step.
کلیدواژهها [English]