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Investigation on the granulation behavior of iron ore fine in a horizontal high-shear granulator

查看全文 作　　者：Yang [1,2]You;Jiabao [1,2]Guo;Gang [1,2]Li;Zhuang [1,2]Zheng;Yong [1,2,4]Li;Yaowei [3]Yu;Xuewei [1,2]Lv 高影响力作者 机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;[2]Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials,Chongqing University,Chongqing 400044,China;[3]State Key Laboratory of Advanced Special Steel,Shanghai Key Laboratory of Advanced Ferrometallurgy,School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;[4]State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China高影响力机构 出　　处：《Particuology》索引2022年第20卷第9期,共8页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(grant Nos.51974048,52004046);China Postdoctoral Science Foundation(grant Nos.2021T140783,2020M673131);the Postdoctoral Science Foundation of Chongqing(grant No.cstc2020jcyj-bshX0030). 摘　　要：High-shear granulation is widely used in many particulate industries for its good capability to improve the size,strength and composition uniformity of powder substances.This work conducted an experimental study to investigate the granulation behavior of iron ore fine in a horizontal high-shear granulator,such as granules size distribution,granules growth rate,and permeability of the granules bed.The results show that the granule size and permeability of packed granules bed increase gradually with increasing the granulation time,and the growth of granules can be divided into three stages:the rapid growth stage,the slow growth stage and the relatively stable stage.Both the higher rotational speed and larger number of impellers increase the kinetic energy and collision frequency of the particles,which causes the increase of average granule size,growth rate and permeability of granules packed bed.On the other hand,the shear damage effect of the impellers on the granules is also enhanced with the increase of rotational speed and impeller number,resulting in significant granule size segregation. 关 键 词：High shear granulation Iron ore PARTICLE Size distribution
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