Insights on pretreatment of Indian hematite fines in grate-kiln pelletizing process: the choice of grinding processes

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	Insights on pretreatment of Indian hematite fines in grate-kiln pelletizing process: the choice of grinding processes
其他题名	Insights on pretreatment of Indian hematite fines in grate-kiln pelletizing process： the choice of grinding processes
	Zhu Deqing 1; Guo Zhengqi 1; Pan Jian 1; Wang Zhaoyuan 2
	2018
发表期刊	JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN	1006-706X
卷号	25 期号:5 页码:506-514
摘要	Indian hematite fines are normally characterized by high iron grade and minor impurities, which are usually used for sinter fines. With macroscale operations technology of blast furnace in Indian, pellets, as a kind of high-quality materials, attract more and more attention. However, the hematite fines possess the coarse size. Hence, they inevitably need to be further finely ground for pelletizing before balling. The grinding behavior of Indian hematite fines was revealed by conducting the ball milling tests and determining the Bond ball mill work index (Wi). The results show that Indian hematite fines have an excellent grindability with Wi of only 7.40-7.73 kWh/t, indicating that ball milling is an economically viable way to pretreat Indian hematite fines. Nonetheless, due to poor sedimentation and filtering properties of wet ground products, the dry ball milling is more appropriate to process Indian hematite fines. In addition, the superior quality green balls can be manufactured with dry ground products under the conditions of 0.5% bentonite dosage, 7.5% moisture and balling for 12 min, which further confirmed that the recommended pellet feed preparation technique is reasonable.
其他摘要	Indian hematite fines are normally characterized by high iron grade and minor impurities, which are usually used for sinter fines. With macroscale operations technology of blast furnace in Indian, pellets, as a kind of high-quality materials, attract more and more attention. However, the hematite fines possess the coarse size. Hence, they inevitably need to be further finely ground for pelletizing before balling. The grinding behavior of Indian hematite fines was revealed by conducting the ball milling tests and determining the Bond ball mill work index （Wi）. The results show that Indian hematite fines have an excellent grindability with Wi of only 7.40-7.73 kWh/t, indicating that ball milling is an economically viable way to pretreat Indian hematite fines. Nonetheless, due to poor sedimentation and filtering properties of wet ground products, the dry ball milling is more appropriate to process Indian hematite fines. In addition, the superior quality green balls can be manufactured with dry ground products under the conditions of 0.5% bentonite dosage, 7.5% moisture and balling for 12 min, which further confirmed that the recommended pellet feed preparation technique is reasonable.
关键词	BOND WORK INDEX IRON-ORE OXIDIZED PELLETS COPPER SLAG MECHANISM MIXTURES Indian hematite fine Dry ball milling Wet ball milling Bond work index Sedimentation characteristic Filtration characteristic
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Hunan Provincial Innovation Foundation for Postgraduate]
CSCD记录号	CSCD:6311151
引用统计	被引频次：2[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/149026
专题	中国科学院金属研究所
作者单位	1.Cent S University, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Zhu Deqing,Guo Zhengqi,Pan Jian,et al. Insights on pretreatment of Indian hematite fines in grate-kiln pelletizing process: the choice of grinding processes[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2018,25(5):506-514.
APA	Zhu Deqing,Guo Zhengqi,Pan Jian,&Wang Zhaoyuan.(2018).Insights on pretreatment of Indian hematite fines in grate-kiln pelletizing process: the choice of grinding processes.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,25(5),506-514.
MLA	Zhu Deqing,et al."Insights on pretreatment of Indian hematite fines in grate-kiln pelletizing process: the choice of grinding processes".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 25.5(2018):506-514.