Prediction of density and volume variation of hematite ore particles during in-flight melting and reduction

作     者：Zhi-yuan Chen Ying-xia Qu Christiaan Zeilstra Jan Van Der Stel Jilt Sietsma Yong-xiang Yang 

作者机构：Department of Materials Science and EngineeringDelft University of TechnologyDelft 2628 CDThe Netherlands School of Metallurgical EngineeringNortheastern UniversityShenyang 110819LiaoningChina Tata Steel EuropeIjmuiden 1970 CAThe Netherlands 

出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)

年 卷 期：2019年第26卷第12期

页      面：1285-1294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）] 080502[工学-材料学] 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：Dutch government Technische Universiteit Delft, TU Delft Materials innovation institute, M2i 

主　　题：Ironmaking process HIsarna Smelting reduction Ore density change Phase transformation Hematite ore particle 

摘      要：HIsarna is a promising ironmaking technology to reduce CO2 *** of phase transformation is essential for reaction analysis of the cyclone reactor of the HIsarna *** addition,data of density and volume of the ore particles are necessary for estimation of the residence time of the particles in the cyclone *** transformation of iron ore particles was experimentally studied in a drop-tube furnace under simulated cyclone conditions and compared with thermodynamic *** the pre-reduction process inside the reactor,the mineralogy of iron ore particles transforms sequentially from hematite to *** density changes of the particles during the melting and reduction can be predicted based on the phase composition and ***,density models in the studies were evaluated with reported experimental data of *** a result,a more reliable density model was developed to calculate the density of the formed slag containing mainly FeO–*** density and volume of the partially reduced ore particles or melt droplets were estimated based on this *** results show that the density of the ore particles decreases by 15.1%at most along the progressive reduction ***,the model results also indicate that heating,melting and reduction of the ore could lead to 6.63%–9.37%swelling of the particles,which is mostly contributed by thermal *** would result in corresponding variation in velocity of the ore particles or melt droplets during the flight inside the reactor.