Effect of process parameters on dry centrifugal granulation of molten slag by a rotary disk atomizer
作者机构：The State Key Laboratory of Refractories and MetallurgyWuhan University of Science and TechnologyWuhan430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of EducationWuhan University of Science and TechnologyWuhan430081HubeiChina Technical CenterHBIS Group Hansteel CompanyHandan056001HebeiChina
出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)
年 卷 期：2021年第28卷第3期
页 面：263-271页
核心收录：
学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080601[工学-冶金物理化学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学]
基 金：This work was financially supported by the National Key Research and Development Program of China(2018YFC1900602) the Open Youth Fund of the State key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology(2018QN03)
主 题：Blast furnace slag Centrifugal granulation Process parameter Disk property Grindability Vitreous content
摘 要：Dry centrifugal granulation(DCG)experiments for blast furnace slag(BFS)were performed by means of a rotary disk atomizer since water quenching method can create a series of *** results showed that the DCG method can granulate the BFS,but the results are easily affected by the slag flow rate,disk rotating speed,disk radius,disk material and slag falling *** granulating parameters with an excessive flow rate,low rotating speed,SiN–SiC disk,stainless steel disk and low slag falling height are detrimental to the granulation *** most suitable parameters for granulation are a slag flow rate of 5.1×10^(−5) m^(3)/s,a disk rotating speed of 1500–2300 r/min,a slag falling height of 0.8 m and a smooth graphitic disk with the radius of 0.1 *** the absence of an off-center flow,the overall best granulating effect produces round particles with mean diameter of 3.43 mm without creating slag *** vitreous content of the BFS particles granulated by graphite disks is 92%,which meets the requirements of cement raw *** Bond work index of dry granulated BFS is 18.4 kWh/t,and the grindability of dry granulated slag and water-quenched slag is similar.
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