三水铝石型高铝褐铁矿粉烧结液相生成特性

doi:10.13228/j.boyuan.issn0449-749x. 20130741

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Abstract Sinter is consolidated by melt phase through adhering the adjacent unreacted nucleus and therefore the melt formation ability of iron ore fine with CaO is very important to guarantee the quality of the sinter. The high temperature simultaneous thermal analyzer was used to examine the melt formation phenomena of Sierra Leone high alumina iron ore fine with CaO. The melt amount increased with the increasing of CaO content and the melt formation peak temperature of the iron ore was stably kept at around 1 209 ℃. The amount of melt decreased and the melt formation temperature decreased first and then increased with the particle size decreasing. The Sierra Leone high alumina iron ore fine with diameter from 0.074 mm to 0.180 mm had the lowest melt formation temperature. The formation temperature and amount of the melt could be both significantly increased with the increasing of flux particle size. When using limestone as the calcium resource, the melt formation temperature was lower and the amount of melt was more than using the calcined lime. Compared with the other kinds of iron ores, the sierra leone high alumina iron ore had the highest melt formation temperature. The medium alumina content limonite had the relatively lower melt formation temperature. The magnetite iron ore fine had the best melt formation property. The sintering pot test result showed that the yield of sinter decreased from 78.37% to 73.36% and the tumbling index decreased from 60.5% to 49.6% with the increasing of Sierra Leone iron ore addition. The appropriate addition ratio should be less than 20% of the ore blender.

Key words： high alumina iron ore sintering melt formation phenomena TG-DSC

Received: 30 December 2013 Published: 02 November 2014

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TF046

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	Articles by authors
	YU An
	DONG Jie-Ji
	LI Hua
	ZUO Mao-Pang
	XUE Qiang-Guo

Cite this article:

YU An,DONG Jie-Ji,LI Hua等. Melt Formation Phenomena of High Alumina Limonite of Gibbsite Type in Sintering Process[J]. Iron and Steel, 2014, 49(11): 25-30.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x. 20130741 OR http://www.chinamet.cn/Jweb_gt/EN/Y2014/V49/I11/25

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