نوع مقاله : علمی-پژوهشی
نویسندگان
1 دانشجوی دکتری فرآوری مواد معدنی، دانشکده مهندسی، دانشگاه کاشان
2 دانشکده مهندسی معدن، دانشگاه صنعتی امیرکبیر
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
To reprocess, the iron ore plant tailings, it is of great importance to know the textural characteristics, due to their passing through at least one stage of processing and accumulation over the time. The present study aims to identify the textural properties of granulated iron ore tailings to predict their processing behavior. The samples of the tailing depots were classified into six size fractions, and chemical analysis, light and electron microscopic studies were performed on each fraction. By processing the images and coding in MATLAB software, a new quantitative parameter related to the degree of involvement of the desired mineral with other minerals was determined as the association index (AI). Mineralogical studies indicate the interaction of magnetite and hematite minerals with other metallic minerals and gangue. Based on the AI calculated for each fraction, the highest correlation is between the magnetite and hematite minerals, which is caused by the martitization of magnetite to hematite. Following that, in the size of +250 microns, the highest AI is for magnetite with the calcite, diopside, garnet, and quartz minerals respectively. In this size fraction, the ratio of AI to the grade of pyrite and chalcopyrite minerals was more than 1, which means magnetite is preferable to these minerals. The results of magnetic separation confirmed the predictions. In dimensions of 250+ microns, in addition to iron mineral, pyrite and chalcopyrite were recovered to magnetic concentrate. This result can be significant for the recovery of copper mineral as a pre-processing stage in coarse particles.
کلیدواژهها [English]
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