Influencing factors and mechanism of water absorption process of iron ores during sintering
来源期刊：International Journal of Minerals Metallurgy and Materials2014年第2期
论文作者：Guo-liang Zhang Sheng-li Wu Juan Zhu Yong-zhi Wang
文章页码：122 - 130
摘 要：The appropriate content and distribution of sinter moisture play an important role in the granulation of iron ores.In this study,the effects of porosity,size distribution,and particle shape on the water absorption rate（WAR）of four types of iron ores were analyzed by using the immersion method and capillary water absorption method.In addition,the mechanism underlying the water absorption process in iron ores was unraveled.It is found that the WARs of iron ores decrease quickly with the increase in water absorption time at the initial stages of water absorption.With further increase in absorption time,the WARs decrease gradually,until near 0.Iron ores with higher porosity,smaller particle size,and plate-like structure have the higher WARs.Compared with pores in the single-particle iron ore,voids among particles in the multi-particle iron oxide play an important role at the initial stages of water absorption.The water absorption mechanism of all single-particle and multi-particle iron ores analyzed in this study includes four steps,wherein the first three steps play a significant role in the sintering process.
Guo-liang Zhang1,2，Sheng-li Wu1,2，Juan Zhu1,2，Yong-zhi Wang1,2
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing2. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing
摘 要：The appropriate content and distribution of sinter moisture play an important role in the granulation of iron ores.In this study,the effects of porosity,size distribution,and particle shape on the water absorption rate（WAR）of four types of iron ores were analyzed by using the immersion method and capillary water absorption method.In addition,the mechanism underlying the water absorption process in iron ores was unraveled.It is found that the WARs of iron ores decrease quickly with the increase in water absorption time at the initial stages of water absorption.With further increase in absorption time,the WARs decrease gradually,until near 0.Iron ores with higher porosity,smaller particle size,and plate-like structure have the higher WARs.Compared with pores in the single-particle iron ore,voids among particles in the multi-particle iron oxide play an important role at the initial stages of water absorption.The water absorption mechanism of all single-particle and multi-particle iron ores analyzed in this study includes four steps,wherein the first three steps play a significant role in the sintering process.
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