Nepheline syenite powder with controlled particle size and method of producing the same

摘要

An ultra-fine nepheline syenite powder produced from a pre-processed nepheline syenite powder feedstock. The powder having a controlled maximum grain size D95 or D99 of less than about 20 microns and a controlled minimum grain size D5 in the range of 2-8 microns with a particle size spread D5-D95 of less than about 12 microns.