DIRECTIONAL CHANGES IN THE PROPERTIES OF ALUMINUM HYDROXIDE-OXIDES FOR INCREASE IN BAUXITE REACTIVITY IN HYDROMETALLURGICAL PROCESSING

摘要

Structural and chemical modifications of the essential Al-containing minerals of bauxite ores-boehmite and diaspore-are examined in the processes of mechanochemical preparation for opening. It is established that the violations changing the character of hydroxide bond and the reactivity of mineralogical bauxite components decrease under mechanical activation in the alpha Al(OH)_3-gamma AlOOH-alpha AlOOH series. The possibilities are considered for intensifying Al_2O_3 extraction in leaching.