Ferrosilicon alloy granules prepared through centrifugal granulation process  

作　　者：Wen-chao He Xue-wei Lv Zhi-ming Yan Gang-qiang Fan 

机构地区：[1]Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials,Chongqing University,Chongqing 400044,China [2]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China [3]State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China

出　　处：《Journal of Iron and Steel Research International》2020年第11期1247-1258,共12页

基　　金：the National Natural Science Foundation of China(Grant No.2018YFC1900501);Graduate Scientific Research and Innovation Foundation of Chongqing(CYB19003).

摘　　要：A novel granulation process that involved the use of a rotary multi-nozzles cup atomizer and water cooling was proposed for ferroalloy manufacturing.The effects of rotating speed and nozzle diameter on the properties of FeSi75 alloy(containing 75 wt.%Si)granules were investigated.Results indicated that median granule diameter decreased as rotating speed in creased,and initially increased and then decreased as nozzle diameter in creased.The optimal conditi ons for the gra nulation of FeSi75 alloy were a rotating speed of 150 r/min and nozzle diameter of 10 or 12 mm.The phase composition,micromorphology,and elemental distribution of the FeSi75 alloy granules were also studied by X-ray diffraction,scanning electron microscopy,and energy-dispersive X-ray spectrometry.In order to provide guidance for the layout and water depth of the tank,the solidification behavior of ferrosilicon alloy droplet was numerically studied.A simplified model was established to elucidate the traveling trajectory and heat transfer of alloy droplet in air and cooling water during the atomization process.The solidification time of droplet with different thicknesses of solidification layer increased with the in crease in alloy droplet diameter.

关 键 词：FeSi75 alloy Rotary multi-nozzles cup atomizer Size distribution Microstructural analysis Solidification behavior 

分 类 号：TG14[一般工业技术—材料科学与工程]