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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Beneficiation of coarse particulate iron ore by using a dry density-based fluidized bed separator
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Beneficiation of coarse particulate iron ore by using a dry density-based fluidized bed separator

机译：通过使用干密度的流化床分离器粗颗粒铁矿石的益处

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A dry density-based fluidized bed separator was used to beneficiate coarse particulate iron ore. The atomized iron powder and zircon sand, with specific size fractions of 150-75 and 250-150 mu m, were mixed in certain proportion to form a binary dense media. The results indicated that the binary dense media efficiently formed stable fluidization within the fluidized bed for subsequent separation of iron ore particles. The theoretical separation density of 3.5-4.0 g/cm(3) was determined by investigating the relationships among particle size, density distribution, and total Fe-grade in the iron ore sample. The effects of static bed height, operational gas velocity, and weight proportion of the atomized iron powder in the binary dense media on the stability of bed density were studied to determine the appropriate operational conditions. The stability of bed density was maintained under the condition with a static bed height of 80-90 mm, an operational gas velocity of 1.6-2.0U(mf), and a weight proportion of the atomized iron powder in the binary dense media of 90%. The effects of static bed height, gas velocity, and size fraction of iron ore particles on the dry separation efficiency were also investigated to determine the optimum separation performance. The optimum total Fe-grade and satisfactory recovery were achieved at appropriate static bed height and gas velocity. The separation efficiency of coarse iron ore particles gradually decreased with decreasing size fraction. This study aims to provide an alternative approach for improving the quality of coarse particulate iron ore. (C) 2017 Elsevier B.V. All rights reserved.
机译：使用干密度的流化床分离器用于使粗颗粒铁矿石受益。雾化的铁粉和锆石砂，具有150-75和250-150μm的特定尺寸级分，以一定比例混合以形成二元致密介质。结果表明，二元致密介质有效地形成流化床内的稳定流化，以便随后分离铁矿石颗粒。通过研究铁矿石样品中的粒度，密度分布和总Fe级之间的关系来测定3.5-4.0g / cm（3）的理论分离密度。研究了静态床高度，运行气体速度和重量比例的二元致密介质中的雾化铁粉对床密度稳定性的影响，以确定适当的操作条件。床密度的稳定性保持在静态床高度为80-90mm的条件下，其运行气体速度为1.6-2.0u（mf），并且在90的二元致密介质中的雾化铁粉的重量比例％。还研究了静态床高度，气体速度和尺寸分数对干分离效率的影响，以确定最佳分离性能。在适当的静态床高度和气体速度下实现了最佳的总Fe级和令人满意的恢复。粗铁矿石颗粒的分离效率随着尺寸馏分的降低逐渐降低。本研究旨在提供一种改善粗颗粒铁矿石质量的替代方法。 （c）2017 Elsevier B.v.保留所有权利。

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