CRYSTALLIZATION BEHAVIOR OF MOLTEN BLAST FURNACE SLAG USING CONFOCAL SCANNING LASER MICROSCOPE

摘要

Extracting perovskite from high titanium-bearing blast furnace (BF) slag is a green and potential method to recover the second titanium resource. The non-isothermal crystallization process of perovskite in synthesized high titanium-bearing slag was studied in situ by confocal scanning laser microscope (CSLM) with cooling rate of 20 K/min. The results showed that perovskite was the primary phase formed during cooling process in the titanium-bearing synthesized slag (TiO_2=23%). Perovskite started to precipitate at 1719 K and finally presented an orthogonal straight lines morphology.