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

基本信息

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

项目摘要

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.

除了具有大量自然资源和能源的发展中国家的爆炸炉外，轴熔炉的过程与其他工艺一样。但是，关于新材料开发的研究和从原始资源到产品的过程评估的研究还不足以在熨斗行业中进展。通过开发高质量的材料和最佳工作条件的选择，预计生产率和节能的提高。从这些角度来看，本研究是在以下主题中进行的。首先，在生产方法，降低性测试和非生物颗粒的物理特性上进行了基本研究。这些颗粒对于水和粉末的共同产生了一些问题，但是发现由于良好的可降低性，该颗粒作为负担材料很有用。第二，非生产的颗粒和块状铁矿石的应用在实验室尺度上研究了轴炉。由于在还原过程中解决了一些问题，并在还原过程中降低了样品的强度，因此发现非生存的颗粒可以应用于轴炉。然后，通过数学模型分析了轴炉中的现象。在各种工作条件下，与轴熔炉的实验结果达成了一致。截然言语，通过释放分析方法进行了铁生产预丝的能量评估。作为结果，使用非捕捞沉淀的非生存过程的能量需求低于解雇过程的能量需求。