Ironmaking System Including Coproduction of Carbon-Loaded Iron Oxide and Reformed Coke Oven Gas by Chemical Vapor Infiltration Process
Ironmaking System Including Coproduction of Carbon-Loaded Iron Oxide and Reformed Coke Oven Gas by Chemical Vapor Infiltration Process
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化学气相渗透法联产载碳氧化铁和重整焦炉煤气的炼铁系统
DOI：
10.1007/s40831-015-0012-x
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发表时间：
2015
影响因子：
2.4
通讯作者：
Tomohiro Akiyama
中科院分区：
文献类型：
--
作者：
Takahiro Nomura;Rochim B. Cahyono;Tomohiro Akiyama
为解决钢铁企业的资源和能源问题，提出了利用煤焦油、褐铁矿石和余热联产含碳氧化铁和焦炉煤气的炼铁系统。在所提出的系统中，褐铁矿石，这是一种低品位的铁矿石与结合水，首先脱水，以获得介孔固体。然后，在化学气相渗透、铁矿石还原和重整过程中，COG中所含的焦油沉积，在矿石的中孔中留下碳。矿石被焦炉煤气还原，焦油被炉渣和焦炉煤气的联合显热重整，这是作为热源，矿石作为催化剂。本研究的目的是通过使用吉布斯自由能最小化技术的过程模拟，从（1）炼钢厂所需的焦炭量，（2）重整焦炉煤气的总化学（火用），（3）负载碳的预还原铁矿石上沉积的碳的质量分数，及（4）在合理假设下，焦炉系统对其他系统的可用热量供应。分析结果表明，与传统炼铁工艺相比，该系统可使焦炭消耗量降低9.62%，总化学火用增加14.2%。
Ironmaking system including coproduction of carbon-loaded iron oxide and reformed coke oven gas (COG) using coal tar, limonite ore, and waste heat is proposed to solve resource and energy problems in steelworks. In the proposed system, limonite ore, which is a low-grade iron ore with combined water, is first dehydrated to obtain a mesoporous solid. Then, during the chemical vapor infiltration, iron ore reduction, and reforming processes, the tar contained in the COG is deposited, leaving carbon in the mesopores of the ore. The ore is reduced by the COG and the tar is reformed by the combined sensible heat of the slag and COG, which acted as a heat source with the ore as a catalyst. The purpose of this study is to estimate the feasibility of the proposed system by process simulation using the Gibbs free energy minimization technique from the viewpoints of (1) the amount of coke required in steelworks, (2) the total chemical exergy of reformed COG, (3) the mass fraction of carbon deposited on carbon-loaded prereduced iron ore, and (4) available supplies of heat from the coke oven system to other systems under the reasonable assumptions given. The results of the analysis showed that, compared to the conventional ironmaking process, the proposed system can help decrease coke requirements by 9.62 % and increase the total chemical exergy by 14.2 %.
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