نوع مقاله : علمی-پژوهشی
نویسندگان
1 رئیس تحقیقات فرآوری، مدیریت تحقیقات و فناوری، شرکت معدنی و صنعتی گل گهر سیرجان
2 گروه مهندسی صنایع، دانشگاه آزاد اسلامی، کیش
3 کارشناس پژوهشی شرکت دانش‌بنیان کاوشگران صنایع معدنی راشا
4 دانشیار، گروه شیمی، دانشکده علوم، دانشگاه زنجان
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Today, the reprocessing of mineral processing plant tailings is important from an economic point of view and environmental issues. The purpose of this research is to characterize the flotation tailings of iron concentrate Golgohar and its pre-processing in order to maximally separate copper and iron minerals and increase their grade. Therefore, after preparing representative samples from flotation tailings; instrumental chemical analysis, particle size analysis and microscopic studies were performed on it. Then, using magnetic separation and classification methods, iron and copper separation and enrichment were done. The characterization results of the tailings showed that its main minerals are pyrite, magnetite and talc, and the iron and copper grades are about 30% and 0.11%, respectively. The results of the pre-processing tests showed that by performing magnetic separation, the grade of iron and copper in the concentrate and tailings increased to 47.8 and 0.18%, respectively. By adding a classification step before magnetic separation and discarding the coarse-grained part of the sample and then performing magnetic separation on the fine-grained part (-38 microns), the grade of iron and copper in the concentrate and tailings, respectively, is 53.6 and improved by 0.21 percent. Therefore, pre-processing can return the iron in the flotation tailings as an intermediate product to the iron concentrate production circuit. On the other hand, by discarding more than half of the flotation tailings, increasing the copper grade and reducing iron in the rest, this operation created many technical and economic benefits for the copper extraction process in the next stages.
کلیدواژه‌ها [English]
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