A new analysis method based on serial sectioning and three-dimensional（3 D）reconstruction was developed to characterize the mineral microstructure of iron ore sinter.Through the 3 Dreconstruction of two types of iro...A new analysis method based on serial sectioning and three-dimensional（3 D）reconstruction was developed to characterize the mineral microstructure of iron ore sinter.Through the 3 Dreconstruction of two types of iron ore sinters,the morphology and distribution of minerals in three-dimensional space were analyzed,and the volume fraction of minerals in a 3 Dimage was calculated based on their pixel points.In addition,the microhardness of minerals was measured with a Vickers hardness tester.Notably,different mineral compositions and distributions are obtained in these two sinters.The calcium ferrite in Sinter 1 is dendritic with many interconnected pores,and these grains are crisscrossed and interwoven;the calcium ferrite in Sinter 2 is strip shaped and interweaves with magnetite,silicate and columnar pores.The calculated mineral contents based on a two-dimensional region are clearly different among various layers.Quantitative analysis shows that Sinter 1 contains a greater amount of calcium ferrite and hematite,whereas Sinter 2 contains more magnetite and silicate.The microhardness of minerals from highest to lowest is hematite,calcium ferrite,magnetite and silicate.Thus,Sinter 1 has a greater tumbler strength than Sinter 2.展开更多
基金financial support from the National Natural Science Foundation of China(51474164)the China Postdoctoral Science Foundation(2016M602378)
文摘A new analysis method based on serial sectioning and three-dimensional（3 D）reconstruction was developed to characterize the mineral microstructure of iron ore sinter.Through the 3 Dreconstruction of two types of iron ore sinters,the morphology and distribution of minerals in three-dimensional space were analyzed,and the volume fraction of minerals in a 3 Dimage was calculated based on their pixel points.In addition,the microhardness of minerals was measured with a Vickers hardness tester.Notably,different mineral compositions and distributions are obtained in these two sinters.The calcium ferrite in Sinter 1 is dendritic with many interconnected pores,and these grains are crisscrossed and interwoven;the calcium ferrite in Sinter 2 is strip shaped and interweaves with magnetite,silicate and columnar pores.The calculated mineral contents based on a two-dimensional region are clearly different among various layers.Quantitative analysis shows that Sinter 1 contains a greater amount of calcium ferrite and hematite,whereas Sinter 2 contains more magnetite and silicate.The microhardness of minerals from highest to lowest is hematite,calcium ferrite,magnetite and silicate.Thus,Sinter 1 has a greater tumbler strength than Sinter 2.
