LOW TEMPERATURE BEHAVIOR OF THE Ca(OH)_2-C SYSTEM AND ITS SIGNIFICANCE ON THE SELF-REDUCTION OF COLD BONDED BYPRODUCT AGGLOMERATES

机译：Ca（OH）_2-C系统的低温行为及其对冷粘合副产品凝聚的自我减少的意义

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The optimization of reduction properties of cold bonded agglomerates, containing iron and steelmaking by-product oxides, is essential during recycling. Metal hydrate content in cold bonded by-product agglomerates can play a significant role in the low temperature self-reduction of said agglomerates. The dehydroxylation of Ca(OH)_2 seems to facilitate the low temperature direct reduction of Fe_2O_3 by solid carbon through gaseous intermediates. The current work is a mechanism study of the reaction(s) occurring after dehydroxylation of Ca(OH)_2 in the presence of C, Fe_2O_3 and Fe. Simultaneous thermogravimetric (TG) analysis, differential thermal analysis (DTA) or differential scanning calorimetry (DSC) and quadrupole mass spectrometric (QMS) gas analysis was performed on samples of Ca(OH)_2 mixed with C, Fe_2O_3 and Fe using a heating rate of 10 deg C/min from 20-800 deg C in argon (Ar). Furthermore, separate thermogravimetric tests were run in order to conduct X-ray diffraction (XRD) analysis on some treated samples. Finally, a comparison of the behavior of the Ca(OH)_2-C system is made to low temperature thermal analysis results of cold bonded agglomerate samples.

机译：在再循环期间，含有铁和炼钢和炼钢副产物氧化物的冷粘合附聚物的还原性能的优化是必需的。冷键合副产物附聚物中的金属水合物含量可在所述附聚物的低温自我还原中发挥重要作用。 Ca（OH）_2的脱羟基化似乎通过通过气态中间体通过固体碳的低温直接减少Fe_2O_3。目前的作品是在C，Fe_2O_3和Fe存在下Ca（OH）_2的脱羟基化后发生的反应的机制研究。对Ca的样品进行同时的热重（TG）分析，差示热分析（DTA）或差示扫描量热法（DSC）和四极质谱（QMS）气体分析（OH）_2与C，Fe_2O_3和Fe使用加热速率下混合在氩气（AR）中的20-800℃/分钟中的10℃/ min。此外，运行单独的热重试验以进行一些处理的样品对X射线衍射（XRD）分析进行。最后，对Ca（OH）_2-C系统的行为进行比较，对冷粘合附聚样品的低温热分析结果进行了低温热分析结果。

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《International Congress on the Science and Technology of Ironmaking》|2006年||共4页
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Ryan Robinson; Nourreddine Menad; Bo Bjorkman;
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LOW TEMPERATURE BEHAVIOR OF THE Ca(OH)_2-C SYSTEM AND ITS SIGNIFICANCE ON THE SELF-REDUCTION OF COLD BONDED BYPRODUCT AGGLOMERATES

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