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Insights on pretreatment of Indian hematite fines in grate-kiln pelletizing process: the choice of grinding processes
Alternative TitleInsights on pretreatment of Indian hematite fines in grate-kiln pelletizing process: the choice of grinding processes
Zhu Deqing1; Guo Zhengqi1; Pan Jian1; Wang Zhaoyuan2
2018
Source PublicationJOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN1006-706X
Volume25Issue:5Pages:506-514
AbstractIndian 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.
Other AbstractIndian 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.
KeywordBOND 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
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Hunan Provincial Innovation Foundation for Postgraduate]
CSCD IDCSCD:6311151
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/149026
Collection中国科学院金属研究所
Affiliation1.Cent S University, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
2.中国科学院金属研究所
Recommended Citation
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.
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