Nanometer bead milling system and nanocrystalline microsphere preparation method

Abstract

The invention discloses a nanometer bead milling system and a nanocrystalline microsphere preparation method. The nanometer bead milling system comprises a bead mill, a plurality of centrifugal machines, a stirring tank and a central control unit. The bead mill comprises a milling cylinder. The milling cylinder is internally provided with a spindle. A centrifugal separation disk and stirring impellers are mounted on the spindle. The centrifugal machines are connected in sequence. Each centrifugal machine comprises an inlet, a heavy liquid outlet and a light liquid outlet. The inlet of the first centrifugal machine is connected with an outlet of the bead mill. The heavy liquid outlets of the centrifugal machines are connected with an inlet of a pump. The light liquid outlet of one centrifugal machine is connected with an inlet of a next stage of centrifugal machine. The stirring tank is used for containing slurry. An outlet of the stirring tank is connected with the inlet of the pump. An outlet of the pump is connected with an inlet of the bead mill. The central control unit is connected with the bead mill, the centrifugal machines, the stirring tank and the pump. The nanometer bead milling system solves the technical problems that the particle size of powder milled through an existing bead milling system cannot reach the nano-scale size, continuous charge production cannot be realized, and the output is low.

Description

technical field [0001] The invention belongs to the field of nano-powder grinding and dispersing, and in particular relates to a nano-bead milling system and a preparation method of nano-crystal microspheres. Background technique [0002] Nanotechnology is an important technical field in the development of science and technology today. Nanotechnology will create another wave of technological innovation and industrial revolution, and its application fields are very extensive, covering the electronics industry, optoelectronics industry, medical biochemical industry and basic industries. Regardless of the field of application, nanoscale materials are required. How to obtain nano-scale powder has become a joint research topic among production, learning and research. [0003] In the past ten years, although there have been several bead mills capable of preparing nano-scale powders, such as disc-type bead mills and pin-type bead mills, they all have shortcomings. Due to the unr...

AI Technical Summary

Problems solved by technology

Due to the unreasonable design of the grinding chamber, the grinding media (beads) are irregularly gathered at the slurry outlet of the grinding chamber, which cannot give full play to the full performance of the microbeads and affects the dispersion effect of the powder pulverizer.

[0004] The bead mills in the prior art all have a precise screen, its function is to make the slurry flow out from the screen, and the grinding bead particles are blocked by the screen and continue to work in the cavity, but the bead mill has no effect on the screen. There are requirements for the gap of the mesh, and the gap must not be larger than half of the average diameter of the grinding medium (beads). Due to the advancement of technology, the particle size of the grinding medium is getting smaller and smaller. There are already 0.015mm beads, and the screen is uniform. The gap is only 0.007mm, which is very difficult to manufacture and difficult to use and maintain. If finer beads continue to appear, the screen structure will not be realized

As of today, the above deficiencies have not been resolved

[0005] In addition, the bead mills of the prior art are all single-trough (barrel) circular grinding during grinding, and cannot continuously feed materials and output continuously. Only one groove (barrel) that passes the grinding can be discharged to the next barrel (trough). ) milling, the output is low, and the particle size distribution of the abrasive is wide

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