Wan, H., Yi, P., Luukkanen, S., Qu, J., Zhang, C., Yang, S., & Bu, X. (2022). Recovering iron concentrate from low-grade siderite tailings based on the process mineralogy characteristics. Minerals, 12(6), 676. https://doi.org/10.3390/min12060676
Recovering iron concentrate from low-grade siderite tailings based on the process mineralogy characteristics
|Author:||Wan, He1,2; Yi, Peng1; Luukkanen, Saija2;|
1School of Resources Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
2Oulu Mining School, University of Oulu, 90570 Oulu, Finland
|Online Access:||PDF Full Text (PDF, 2.5 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2023020726190
Multidisciplinary Digital Publishing Institute,
|Publish Date:|| 2023-02-07
Refractory iron ore is often discarded as tailings. This causes a great waste of iron resources. In this paper, the flash roasting-magnetic separation process was designed by combining the magnetic separation process of magnetite and the process mineralogy of iron tailings. The flash suspension roasting effects with 3–4 s roasting time were evaluated by magnetic separation. The MLA results show that the tailings are ground to a fineness of P90 −75 μm, where the distribution of siderite and M/H in the −75 μm particle size is 85.37% and 92.75%, respectively. Moreover, M/H and siderite are mainly associated with muscovite and quartz. This indicates that regrinding for contiguous bodies of M/H and siderite is beneficial for improving the grade and recovery of iron concentrates. The results of the flash roasting-magnetic separation process show that a mixed iron concentrate containing 60.10% Fe with an iron recovery of 81.13% would be achieved after selective grinding and staged magnetic separation of the roasted ore. The result indicates that the flash suspension roasting effects with 3–4 s roasting time are achievable. The study provides an efficient approach for recovering refractory iron from tailings.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
222 Other engineering and technologies
This research was funded by Shaanxi Provincial Natural Science Basic Research Program (Grant No. 2019JLZ-05), Shaanxi Provincial Department of Education Service Local Special Project (Grant No.21JC021), China Scholarship Council (Grant No. 202008610058), National Natural Science Foundation of China (Grant No. 51904222), Shaanxi International Cooperation and Exchange Project (Grant No. 2021KWZ-16), Xi’an University of Architecture and Technology Special Project for Natural Science (Grant No. ZR20066) and the Natural Science Foundation of Qinghai Province, China (Grant No. 2021-ZJ-975Q).
All data, models, and code generated or used during the study appear in the article.
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