Theoretical Yield of Metallic Fe by COG in a Shaft Furnace in the Case of O_2 Pyrolysis

Xin JIANG; Fang LONG; Lin WANG; Yulu ZHOU; Haiyan ZHENG; Qiangjian GAO; Fengman SHEN

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Theoretical Yield of Metallic Fe by COG in a Shaft Furnace in the Case of O_2 Pyrolysis

机译：在O_2热解的情况下，齿轮在轴炉中的金属Fe理论产量

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Reduction shaft furnace is an effective process to produce Direct Reduced Iron (DRI), in which natural gas is used as reducing agent and heat source. Recently, in some countries lacking natural gas resources, Coke Oven Gas (COG) was proposed to be used in shaft furnace process instead of natural gas. In the present work, the effect of COG consumption on the yield of metallic Fe in shaft furnace was thermody-namically calculated. Both the chemical equilibrium and heat balance were considered. The main findings include, in shaft furnace process, the COG consumption as heat source is more than that as reducing agent. In the case of directly supplying reformed COG, the yield of metallic Fe decreases with increasing formation temperature of metallic Fe. For a coke oven with capacity of 600 000 tons, as the formation temperature are 850°C and 900°C, the corresponding annual yields of shaft furnace are 253.58 × 10~3 tons/year and 249.48 × 10~3 tons/year. In the case of ZR technology followed by supplying extra COG, the yield of metallic Fe first increases and then decreases, and there is a peak value. For a coke oven with capacity of 600 000 tons, as the formation temperature are 845°C and 900°C, the corresponding annual yields of shaft furnace are 283.44 × 10~3 tons/year (maximum value) and 278.38 × 10~3 tons/year. The findings from this work may provide guidelines for choosing optimal parameters for an actual shaft furnace process.

机译：还原轴炉是生产直接还原铁（DRI）的有效工艺，其中天然气被用作还原剂和热源。最近，在一些缺乏天然气资源的国家，提出焦炉气体（COG）用于轴炉过程而不是天然气。在目前的工作中，齿轮消耗对轴炉中金属Fe产量的影响是热处理的。考虑化学平衡和热平衡。主要发现包括在轴炉过程中，作为热源的齿轮消耗量大于还原剂。在直接供应重整齿轮的情况下，金属Fe的产量随着金属Fe的形成温度的增加而降低。对于容量为600 000吨的焦炉，由于地层温度为850°C和900°C，相应的轴炉的年收率为253.58×10〜3吨/年，249.48×10〜3吨/年。在Zr技术的情况下，通过供应额外的齿轮，金属Fe的产率首先增加，然后降低，并且存在峰值。对于容量为600 000吨的焦炉，由于地层温度为845°C和900°C，相应的轴炉的年收率为283.44×10〜3吨/年（最大值）和278.38×10〜3吨/年。这项工作的发现可以提供用于为实际轴炉过程选择最佳参数的指导。

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来源
《ISIJ international》 |2021年第1期|129-137|共9页
作者
Xin JIANG; Fang LONG; Lin WANG; Yulu ZHOU; Haiyan ZHENG; Qiangjian GAO; Fengman SHEN;
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作者单位

School of Metallurgy Northeastern University Shenyang Liaoning 110819 China;

School of Metallurgy Northeastern University Shenyang Liaoning 110819 China Technology Center Anyang Iron and Steel Group Co. Ltd. Anyang Henan 455000 China;

Department of Mechanical Engineering Shenyang Institute of Engineering Shenyang Liaoning 110136 China;

School of Metallurgy Northeastern University Shenyang Liaoning 110819 China;

School of Metallurgy Northeastern University Shenyang Liaoning 110819 China;

School of Metallurgy Northeastern University Shenyang Liaoning 110819 China;

School of Metallurgy Northeastern University Shenyang Liaoning 110819 China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
direct reduction; shaft furnace; Coke Oven Gas (COG); yield of metallic Fe; thermodynamic calculation;

机译：直接减少;轴炉;焦炉煤气（COG）;金属Fe的产量;热力学计算;

Theoretical Yield of Metallic Fe by COG in a Shaft Furnace in the Case of O_2 Pyrolysis

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