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首页> 外文期刊>ISIJ international >Granulation Effectiveness of Iron Ore Sinter Feeds: Effect of Ore Properties
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Granulation Effectiveness of Iron Ore Sinter Feeds: Effect of Ore Properties

机译：铁矿石烧结矿进料的造粒效果：矿石性能的影响

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This paper developed a quantitative understanding of the effect of ore properties on granulation effectiveness for different iron ore types based on the mechanistic model proposed by J.D. Litster et al. The granulation effectiveness was measured by the magnitude of x _(0.5), which was postulated to be a function of the layer binding strength. Water was adopted as the only binder for all granulation tests. A wide range of moisture contents, up to the optimum moisture content that yielded an optimum permeability, was tested for each ore type. The typical structure of granules made from different ores was investigated to reveal the effect of mineralogical properties of ore particles on the growth of granules. The results indicate that the granulation effectiveness x _(0.5) varies markedly with ore type and moisture content. Feed particle size distribution and moisture for granulation are paramount factors determining the granulation effectiveness x _(0.5), which has a single relationship with the mass mean size of layering particles independent of ore type. The mass mean size of layering particles is dependent on the inherent size distribution of raw materials and the mass fraction of layering particles, while the latter is linear to available moisture content. The model works well for some ore types except for those with unreasonable size distributions: 1) excessive intermediate particles meanwhile lacking of fine particles; or 2) excessive ultrafine particles. An effective criteria closely related to layer binding strength, (1?ε )S /ε d , is proposed to determine the applicability of the model.
机译：本文基于J.D. Litster等人提出的力学模型，对不同铁矿石类型的矿石性能对造粒效果的影响进行了定量的了解。造粒效率通过x_（0.5）的大小来测量，其被假定为层结合强度的函数。水被用作所有制粒测试的唯一粘合剂。对于每种矿石，都测试了宽范围的水分含量，直至达到最佳水分含量的最佳渗透率。研究了由不同矿石制成的颗粒的典型结构，以揭示矿石颗粒的矿物学特性对颗粒生长的影响。结果表明，制粒效率（0.5）随矿石类型和水分含量的不同而有显着差异。进料粒度分布和制粒水分是决定制粒效率的重要因素，其与成矿颗粒的质量平均尺寸具有单一关系，而与矿石类型无关。分层颗粒的质量平均尺寸取决于原材料的固有尺寸分布和分层颗粒的质量分数，而后者与可用水分含量呈线性关系。该模型适用于某些矿石类型，但尺寸分布不合理的矿石除外：1）中间颗粒过多，而缺乏细颗粒;或2）过多的超细颗粒。提出了与层结合强度紧密相关的有效准则，（1αiε）S /iεd，以确定该模型的适用性。

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