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A PROCES FOR PRODUCING HIGH PURITY FE2 O3 FOR VALUE-ADDED APPLICATIONS INCLUDING BLAST FURNACE FEED FOR A POOR-GRADE IRON ORE SLIME
A PROCES FOR PRODUCING HIGH PURITY FE2 O3 FOR VALUE-ADDED APPLICATIONS INCLUDING BLAST FURNACE FEED FOR A POOR-GRADE IRON ORE SLIME
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机译：用于增值应用的高纯度FE 2 O 3 的生产工艺，其中包括高炉铁粉用于劣质铁矿浆的增值应用
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摘要
The invention relates to a process for producing high purity Fe2O3 for value- added applications including blast furnace feed from a poor-grade iron ore slime, comprising the steps of separating through a non-selective dispersion of iron-containing ultra fines having different particle sizes ranging between 100 micron to 100 nm, into coarser and finer categories in a plurality of hydrocyclones of different sizes, wet-grinding the coarser category with a particle size of more than 15 microns under varied concentration to convert into finer category with a particle size of less than 15 microns; and allowing the produced fines in a single benefication step to undergo a selective flocculation by adapting a modified starch which generates a first concentrate containing around 68.5% Fe, 0.8% alumina, and 1% silica, and a first tailing containing around 29.8% Fe, 20.5% alumina, and 19.67% quartz; allowing the first concentrate to undergo a further dispersion followed by a further selective flocculation to produce high grade concentrate and a second tailing, the high grade concentrate being suitable for value-added applications; and allowing the first tailing to undergo a selective flocculation to produce a second concentrate and a second tailing, the second tailing being suitable as material for refractory and building construction, wherein the second concentrate suitable for peptization.
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机译：本发明涉及一种用于增值应用的高纯度Fe 2 O 3 的生产方法，该应用包括从劣质铁矿泥中加入高炉，包括以下步骤：通过非选择性地将粒径范围在100微米至100 nm之间的含铁超细颗粒分散在多个不同尺寸的水力旋流器中，分为越来越细的类别，对粒度较大的湿法进行湿磨。在不同浓度下大于15微米，以转换为粒度小于15微米的较细类别;并通过采用改性淀粉，使一次选矿步骤中产生的细粉经历选择性絮凝，改性淀粉产生的第一精矿含有约68.5％的铁，0.8％的氧化铝和1％的二氧化硅，以及第一尾矿含有约29.8％的铁， 20.5％的氧化铝和19.67％的石英;使第一浓缩物进行进一步的分散，然后进行进一步的选择性絮凝以生产高品位浓缩物和第二尾矿，该高品位浓缩物适用于增值应用;使第一尾矿进行选择性絮凝以产生第二浓缩物和第二尾矿，第二尾矿适合作为耐火材料和建筑材料，其中第二浓缩物适合于胶溶。
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