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Microstructural characterization of Brazilian Iron ores for quality control in iron making - a geometallurgical approach

机译：钢铁矿石矿石矿石矿石微观结构 - 一种土产冶金方法

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Geometallurgical characterization of iron ore which is a raw material for Iron making as in the case of charcoal blast furnaces operating in Brazil or for production of agglomerates such as iron ore sinter which serves as burden material for blast furnces of high productivity or pellets extensively used in the direct reduction processes all over the world in the iron and steel industry. Selection of proper raw material after due characterization should lead to an improvement of the productivity of the respective processes The usual classification of quality of iron ore is uniquely based on chemical analysis, granulometric and physical parameters. However not much emphasis has been given to the structural characteristics which also are important in the processes. Different typological categories of Brazilian iron ores have been used in the characterization. For instance, several kinds of hematite crystals like specularite, martite and microgranular hematite, etc with variable crystal sizes are found in the different ore types. They are also composed of different of fabrics and types of accessorial mineralogical constituents and have different porosities, pore diameters, etc which influence the cold and the hot agglomeration stages of the ore fines, and also chracteristics such as reducibility, decrepitation etc, important for assessment of quality of iron ores. . The first step for attaining a good characterization of ores is to know in detail about the structure of the deposit, shape of the body, types of iron ores and their distribution. This requires a geological-structural study and the mapping of the bodies using mineralogical criteria for typological classification of ores.followed by structural characterization of materials in stages of mining, comminution, screening and concentration processes. In this contribution a geometallurgical approach for quality control of Brazilian iron ores for sintering and pelletizing processes is highligted.
机译：铁矿石的几何矿质表征，其是铁的原料，如在巴西在巴西运行的木炭高炉的情况下，用于制造铁矿石烧结炉，其用作高生产率或颗粒的高生产率或颗粒的负担材料钢铁工业世界各地的直接减少流程。由于表征后适当原料的选择应导致的各个处理铁矿石的质量的通常分类被唯一地基于化学分析，粒度和物理参数的生产率的提高。然而，没有多大重视结构特征在过程中也很重要。在表征中使用了不同的巴西铁矿石类型类别。例如，在不同的矿石类型中发现了几种具有可变晶体尺寸的镜面，马丁基和微血液等种类的赤铁矿晶体。它们还由不同的织物和类型的矿物质学成分组成，具有不同的孔隙率，孔径等等，其影响矿石的冷和热聚阶段，以及减少性，重症等的计数，对评估很重要铁矿石的质量。 。获得良好表征ORES的第一步是详细了解沉积物，身体形状，铁矿石类型及其分布的结构。这需要使用矿物学标准进行地质结构研究和身体的映射，用于矿石的类型学分类。通过采矿，粉碎，筛选和浓缩过程的阶段的结构表征。在这一贡献中，用于烧结和造粒过程的巴西铁矿石质量控制的几何冶金方法是高标度。

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