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Steel is a country's economic pillars, plays an important role in the national economy. With industrial development, China's demand for iron ore has increased year by year, domestic iron ore production also increased, but still failed to meet domestic demand, imports more than 50% dependence. In 2009, China Steel Association and Rio Tinto talks fail, resulting in the price of iron ore fines to further improve. Facing this predicament, to resolve the gap between supply and demand must take measures to deal with \times resource beneficiation workers have more and more attention. From the reality of the tailings resources in China, vigorously tailings comprehensive utilization of resources, resources development and conservation simultaneously, improve the efficiency of resource use, and has a very important economic and social significance. Used in this study sample heap after a mine in Yunnan election iron tailings in the tailings pond, including the initial production of tailings, prior to the renovation of the 2007 mill tailings and 2007 ○ ○ transformation tailings. Initial production is not recovering weakly magnetic iron minerals such as hematite and limonite before the 2007 renovation strong magnetic separator is not enough cause some hematite and limonite iron mineral loss in the tailings The tailings containing hematite and limonite iron minerals can be recycled. 2007 transformation hematite iron mineral loss in the tailings., But this is part of the refractory iron minerals. As the production progresses, the growing stock of tailings pile, according to estimates, a total of about 2.5 million tons of the tailings, iron grade of about 25%, and its re-election is expected to provide 50 million tons of iron concentrates. For the problems faced by the mine as soon as possible to develop the use of the tailings, the thesis of a tailings process mineralogy studies, small-scale test, expand testing and beneficiation products investigated. Sample the complex nature of the tailings useful minerals hematite, limonite and a small amount of magnetite (maghemite), gangue minerals chlorite, quartz, apatite process mineralogy study found: (phosphate rock), (iron) dolomite, calcite, barite. Ore 24.62% iron, iron output in the form of an independent mineral limonite, hematite and isomorphous chlorite, ankerite, etc.. The limonite main was disseminated distribution to micritic - microcrystalline dolomite, partly in order to form output of clastic veined, the adverse effects of the concentrate iron grade and recovery can not be ignored; hematite mainly debris in the form of output. 18.1% of the total iron ore in the distribution of ankerite, chlorite, pyrite, and chalcopyrite in limiting the recovery rate of the concentrate iron. For this ore characteristics, the study by a large number of tests, and eventually find effective recovery process of the tailings that high intensity magnetic separation - grading Picks - shaker Picks trial process of the magnetic concentrate grading fine ore as a direct output of the concentrate, the crude concentrate Shaker Featured cycle re-election the shaker in mine regrinding. Its sorting indicators of:-0.037mm fine-grained concentrate grade of 49.67%, 33.24% recovery; the coarse concentrate grade 58.16%, 7.66% recovery; final concentrate grade of 51.07%, 40.90% recovery. Expand intensity magnetic separation test grinding loose - grading Picks - shaker Picks test process, test to obtain a better indicator:-0.037mm fine-grained concentrate grade of 49.97%, 32.44% recovery; coarse concentrate grade of 57.33%, the recovery rate of 4.54%; final concentrate grade of 50.78%, 36.98% recovery rate. In summary, the use of high intensity magnetic separation tailing - grading Picks - shaker selection test process ore processing to achieve comprehensive recovery tailings pond in iron minerals. The fine grade shaker effect, grade-0.037mm fine concentrate ore recoveries further improve. The inadequacies of the ore in the S, P did not do targeted research, resulting concentrates containing S, P high.
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