强化制粒对含铬型钒钛混合料烧结的影响

doi:10.13228/j.boyuan.issn0449-749x.20140230

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Abstract Cr-bearing vanadium and titanium magnetite(V-Ti-Cr) mixture is of poor granulating efficiency and poor permeability，and has a serious impact on the development of low temperature and high material layer sintering. The effects of many parameters，including burnt lime addition，mixture moisture，wetting time and granulation time，on the sintering of V-Ti-Cr mixture were performed by sinter pot test and the effects of enhanced granulation were investigated on the basis of reference scheme .The results show that [d]，GI0，[E]，[B] increase from 2.26 mm，66.30%，54.11%，48.15% to 2.58 mm，80.43%，90.82%，73.53%，respectively. And sintering rate，yield，productivity，strength increase from 16.54 mm/min，70.39%，1.22 t/(m2·h)，55.36% to 19.70mm/min，77.94%，1.64 t/(m2·h)，59.36%，respectively，under the conditions of 5% burnt lime addition，7.5% moisture，wetting for 10min and granulation for 8 min when the basicity of the mixture is 2.15，with 3.20% carbon. The moisture fluctuations of V-Ti-Cr mixture with a high sensitivity to moisture should be controlled strictly. The amount of calcium ferrite was increased and the mineral composition and structure of V-Ti-Cr sinter were improved，which was achieved by improving the oxygen in the bed with a higher permeability for the enhanced granulation，resulting in higher yield and quality.

Key words： Cr-bearing vanadium and titanium magnetite enhanced granulation burnt lime moisture sinter

Received: 15 April 2014 Published: 18 March 2015

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	ZHOU Mi
	JIANG Shou
	XUE Xiang-Xin

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ZHOU Mi,JIANG Shou,XUE Xiang-Xin. Effect of enhanced granulation on Cr-bearing vanadium and titanium magnetite sintering[J]. Iron and Steel, 2015, 50(3): 39-43.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20140230 OR http://www.chinamet.cn/Jweb_gt/EN/Y2015/V50/I3/39

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