Development of a novel process for energy and materials recovery in steelmaking slags
Development of a novel process for energy and materials recovery in steelmaking slags
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DOI：
10.1080/03719553.2016.1259871
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发表时间：
2017-01
期刊：
影响因子：
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通讯作者：
Juncheng Li;D. Bhattacharjee;Xiaojun Hu;Dianwei Zhang;S. Sridhar;Zushu Li
中科院分区：
文献类型：
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作者：
Juncheng Li;D. Bhattacharjee;Xiaojun Hu;Dianwei Zhang;S. Sridhar;Zushu Li
这项工作的目的是收集基础知识，为开发一种新的过程，能源（H2气体）和材料（磁铁矿Fe3O4）回收的热钢渣通过反应熔融的炼钢渣与蒸汽。通过热力学模拟计算了控制冷却过程中引入的H2O-Ar气体体积和熔渣析出相的累积氢气产生量。利用共聚焦激光扫描显微镜对钢渣冷却过程中的结晶行为进行了现场观察，并利用SEM-EDS和XRD对冷却后的钢渣进行了表征。创建了不同炉渣的CCT图，显示了不同冷却速率下炉渣的结晶/相变。计算了氧化渣中H2气的回收率和氧化铁的最大潜在回收率，结果表明，在该条件下，当炉渣碱度由1.0提高到1.5和2.0时，H2气的回收率由12.6%提高到23.7%和22.6%，氧化铁的最大潜在回收率由18.3%提高到34.4%和32.8%。
This work aims at gathering fundamental knowledge for the development of a novel process for energy (H2 gas) and materials (magnetite Fe3O4) recovery in hot-steelmaking slags by reacting molten steelmaking slag with steam. Thermodynamic simulation was carried out to calculate the accumulated amount of produced H2 gas as a function of the volume of H2O–Ar gas introduced and the precipitated phases of the molten slags during controlled cooling. Laboratory experiments of crystallization behaviours of molten slags during cooling were visualized in situ through a confocal laser scanning microscope, and the cooled slags obtained were characterized by using SEM-EDS and XRD. CCT diagrams for different slags were created showing the slag crystallization/phase transformation at different cooling rates. The recovery ratio of H2 gas and the maximum potential recovery ratio of iron oxide in the oxidized slags were calculated, which concludes that with increasing the slag basicity from 1.0 to 1.5 and 2.0, the recovery ratio of H2 was found to increase from 12.6 to 23.7% and 22.6%, and the maximum potential recovery ratio of iron oxide was found to increase from 18.3 to 34.4% and 32.8% under the investigated conditions.