润磨对人工磁铁精矿球团性能的影响

doi:10.13228/j.boyuan.issn0449-749x.20170216

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Abstract Artificial magnetite has incomplete crystal structure， and the internal structure of ore has a high degree of nonuniformity， which has different effects on its surface activity and specific surface area. These factors have a decisive influence on the performance of the artificial magnetite concentrate. The effect of damp milling on artificial magnetite pellets is explored. Damp milling technology is one of the most effective operations on improving pellet’s quality. To research the effect of damp milling on surface properties of artificial magnetite concentrate， pelletizing ability and properties of roasting pellets， with artificial magnetite concentrate from Fujian and Jiuquan as the raw material， a series of pelletizing tests were performed on the pretreated materials. The results show that size distribution of artificial magnetite particle is more reasonable for balling， surface morphology is changed， the specific surface area and surface activity are improved significantly， pelletizing ability are ameliorated， the drop strength and compressive strength are increased， the dosage of bentonite is decreased， but the shock temperature is dropping. As the particles accumulate more closely in the ball， the porosity of the pellets is reduced and the contact area of the particles is increased. At the same time， the surface irregularity of mineral particles increases， which not only makes the solid-phase diffusion reaction easier and can effectively improve the compressive strength of the artificial magnetite concentrate after roasting， but also reduces the roasting temperature and the calcination time without affecting the strength of the fired ball. This method will reduce the total energy consumption for enterprises.

Received: 08 May 2017 Published: 05 February 2018

PACS:

TF046.6

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	Articles by authors
	LIU Zhang-Xin
	YU Jun-Jie
	ZHANG Ze-Jiang
	ZHANG Han-Quan

Cite this article:

LIU Zhang-Xin,YU Jun-Jie,ZHANG Ze-Jiang等. Influence of damp milling on properties of artificial magnetite pellets[J]. Iron and Steel, 2018, 53(1): 17-23.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20170216 OR http://www.chinamet.cn/Jweb_gt/EN/Y2018/V53/I1/17

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