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.
Claims35
1-58. (canceled)
A nepheline syenite powder with a particle size where at least 99% of the particles have a particle size less than 10 microns, said powder having a D 50 particle size of less than 2.0 microns and wherein particles having a size of less than about 0.2 microns are removed and the D 5 particle size is substantially less than 0.5 microns.
A nepheline syenite powder free of added moisture, said powder being ultra-fine with a controlled particle size D 99 of said powder is less than 10 microns.
A new nepheline syenite powder free of added moisture, said powder being ultra-fine with a particle size distribution where the D 99 particle size of said powder has a controlled value in the range of 5-10 microns.
A new nepheline syenite powder free of added moisture, said powder being ultra-fine with a particle size distribution where the maximum particle size of said powder is less than 6 microns.
Dependencies are inferred from the claim text.