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US 2023/0053620 A1Published application
Particle size control method
AssigneeCoatex
InventorsBenoit MAGNY, Celine METHIVIER, Jacques MONGOIN
Life of this patent
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Abstract
The invention relates to a method for grinding phosphate rock in the presence of a particular anionic polymer having a molecular weight of between 1000 and 90000 g/mol, which makes it possible to control the extent (S) of the volume distribution of the particle size of obtained phosphate mineral particles. The invention also relates to a method for improving the production yield of a phosphate rock grinding method.
Claims17
A method for preparing an aqueous suspension of phosphate mineral particles, comprising:
- grinding a of at least one phosphate material in the presence of water and an anionic polymer (P) with a molecular mass by weight (MW) between 1,000 and 90,000 g/mol, wherein the anionic polymer (P) is obtained by polymerisation reaction of at least one acid selected from the group consisting of acrylic acid, methacrylic acid and salts thereof,
- wherein a span (S) of a volume distribution of particle sizes [(d0.9−d0.1)/d0.5] measured by laser diffraction is less than 4.1.
An aqueous suspension of mineral particles of a phosphate material, comprising:
- at least one anionic polymer (P) with a molecular mass by weight (MW) between 1,000 and 90,000 g/mol, wherein the anionic polymer (P) is obtained by polymerisation reaction of at least one acid selected from the group consisting of acrylic acid, methacrylic acid and salts thereof,
- wherein a span (S) of a volume distribution of particle sizes [(d0.9−d0.1)/d0.5] measured by laser diffraction is less than 4.1.
-19. (canceled)
Dependencies are inferred from the claim text.