Aluminium silicate ore granulate - is produced by loosening the mineral structure and agglomerating moist particles in pressureless manner

摘要

Al silicate contg. ores are formed into stable granulates which are suitable for digestion with acid, by first loosening the mineral structure of the ore to such a degree that the primary structure is destroyed and then agglomerating the fine particles pressureless and at a moisture content of 20-30%. This gives agglomerates of >2 mm dia, which are subsequently calcined at 650 degrees - 850 degrees C. The stable granulates give a greater yield and the formation of a suspension of finely dispersed insoluble solids when being digested with the acid is avoided.