Nano talcum powder and preparation method thereof

• Main Authors: WANG XIANGUANG, XU YUNFENG, YANG XIANRONG, DU GAOXIANG, FENG WENXIANG
• Format: Patent
• Language: Chinese; English
• Published: 21.07.2023
• Subjects: ADHESIVES; CHEMISTRY; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; PREPARATION OF CARBON BLACK; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

The invention provides nano talcum powder and a preparation method thereof, and relates to the technical field of mineral processing. Comprising the following steps: S1, adding talcum powder into water, adding a proper amount of a grinding aid A and a grinding aid B, and stirring and dispersing at a high speed to obtain slurry; s2, pumping the prepared slurry into a bead mill, and grinding until d90lt; the particle size is 100 nm, so that nanoscale talcum powder slurry is obtained; s3, filtering, drying and scattering the prepared nanoscale talcum powder slurry to obtain the nano talcum powder. In the invention, the nano talcum powder is prepared by adopting a wet grinding technology. Meanwhile, nano oxide or nano compound powder is used as one of the grinding aids, and agglomeration of nano-scale talcum powder is prevented by utilizing a steric hindrance effect, so that the problem of agglomeration caused by interlayer charge adsorption of a talc lamellar structure in wet grinding of talcum powder is solved.