Study of aluminosilicate microspheres using SEM – EPMA

Abstract

This work discusses the studies based on the microstructural properties of the improved ash and slag materials obtained after flotation enrichment with SEM-EPMA analysis (Scanning Electron Microscope and Electron Probe Microanalysis). According to the results of the analysis aluminosilicate microspheres was found in all four samples with a certain concentration and their similar morphology were identified. The microspheres are characterized by a spherical shape and a rough shell surface. Moreover, the shells are characterized by different morphology, which is typical after flotation enrichment. The size of the microspheres is less than 100 microns. The chemical composition of all four samples are inhomogeneous and was found by linear EDS (Energy-dispersive X-ray spectroscopy) analysis. However, the average values of the content of elements are quite close to each other. The special significance of the work is emphasized by the cross section of the shells of microspheres, which are similar to the crystallization structure of molten metal. They play an important role as materials in the construction industry. According to the results of SEM-EPMA studies, it is recommended to apply ash and slag materials, containing aluminosilicate microspheres, obtained after flotation enrichment, in construction industry.