Effective Use of Energy in the Direct Reduction Process by Shaft Furnace

竖炉直接还原过程中能源的有效利用

• 批准号: 61550490
• 负责人: TAKAHASHI Reijiro
• 金额: $ 1.34万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550490/
• 关键词: Direct Reduction; Ironmaking Process; Addition of Cement; Drying; Energy Saving; Energy Evaluation; エネルギー評価; エクセルギー解析; 直接製鉄プロセス; 還元鉄製造; シャフト炉; ロータリーキルン; 焼成ペレット; 非焼成ペレット; 必要エネルギー

Shaft furnace process as other process besides blast furnace in developing countries which have much amount of natural resources and energy is operating now. However, studies on the development of new materials and process evaluation from original resources to products are not enough progressed in the ironmaking industries. Improvement on the productivity and energy saving is expected by development of high quality materials and selection of optimum operating conditions.From these standpoint, this study was performed in the following subjects. Firstly, fundamental studies were performed on the production method, reducibility test and physical properties of nonfired pellets. The pellets have some problems for combined water and powder generation, however, it was found that the pellets was useful as the burden materials because of good reducibility.Secondly, applicabilities of nonfired pellets and lumpy iron ore to shaft furnace in laboratory scale were investigated. As some problems were solved on the combined water and decrease of strength of samples during reduction, it was found that the nonfired pellet are possible to apply to the shaft furnace. And then, he phenomena in the shaft furnace were analyzed by the mathematical model. Calculated results were agreed with the experimental ones of shaft furnace under various operating conditions.Lastly, energy evaluation of reduced iron production precess was conducted by the method of exergy analysis. As the results, energy requirement of nonfired process using nonfired pellet was lower than that of fired process.

在自然资源和能源资源丰富的发展中国家，竖炉工艺与高炉外的其他工艺一样，目前正在运行中。然而，炼铁行业在新材料的开发和从原始资源到产品的工艺评价方面的研究还不够深入。通过开发高质量的材料和选择最佳的操作条件来提高生产率和节能效果。首先，对不烧球团的生产方法、还原性能试验和物理性能进行了基础性研究。球团矿在水粉联产方面存在一些问题，但由于还原性能好，球团矿可作为炉料。其次，对不烧球团矿和块状铁矿石在竖炉上的适用性进行了实验室研究。解决了还原过程中样品结合水和强度下降的问题，发现不烧球团在竖炉上应用是可行的。然后利用该数学模型对竖炉内的氦现象进行了分析。计算结果与竖炉在不同操作条件下的实验结果吻合较好。最后，利用火用分析方法对还原铁水生产过程进行了能量评价。结果表明，不烧球团的能耗低于烧成球团。

项目成果

Tomohiro Akiyama et al.: "Exergy Evaluation on the Pellets Production and Direct Reduction Processes for the Fired and Cement Bonded Pellets" Tetsu-to-Hagane. 73. 2108-2115 (1987)

Tomohiro Akiyama 等人：“对烧制和水泥粘合颗粒的颗粒生产和直接还原过程的火用评估”Tetsu-to-Hagane。

Tomohiro Akiyama.: ISIJ,International. 29. (1989)

秋山智宏：ISIJ，国际。

秋山友宏,他: 鉄と鋼.

Tomohiro Akiyama 等人：《钢铁》。

八木順一郎: 東北大学選研彙報. 42. 91-99 (1986)

八木纯一郎：东北大学研究公报。42. 91-99 (1986)

高橋礼二郎,他: 鉄と鋼. 72. S883 (1986)

Reijiro Takahashi 等人：Tetsu to Hagane 72. S883 (1986)。