Ultrafine nepheline syenite
AssigneeUnimin Corporation
InventorsJerry William Janik, Scott Van Remortel
Life of this patent
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Abstract
A useable particulate nepheline syenite having a grain size to provide an Einlehner Abrasive Value of less than about 100 is described. The particulate nepheline syenite is generally free from agglomeration and moisture free. At least 99% of the nepheline syenite particles have a size less than 10 microns. In practice, the nepheline syenite grain size is less than about 5 microns and the distribution profile of the particulate system is generally 4-5 microns.
Claims21
1-38. (canceled)
A nepheline syenite powder with a particle size where at least 99% of the particles of said powder has a particle size of less than 10 microns, said powder made by milling nepheline syenite in a ball mill operated substantially dry to produce a feedstock and classifying said feedstock to remove particles greater than said particle size.
A nepheline syenite powder with a particle size where at least 99% of the particles of said powder has a particle size of less than 10 microns and the distribution of particle size is in the range of 4-5 microns.
A nepheline syenite powder with a particle size where at least 99% of the particles of said powder has a particle size of less than 10 microns, said powder having a D50 particle size of less than about 2.0 microns and wherein particles having a size of less than about 0.2 microns are removed.
Dependencies are inferred from the claim text.