Nanocrystalline microsphere additive and preparation method thereof

Abstract

The invention discloses a nanocrystalline microsphere additive and a preparation method thereof. The preparation method comprises the following steps: (1) putting one or more manganese oxides, industrial water, and a dispersant in a predetermined weight percentage into a mixing tank for Stir for 30 to 60 minutes to form a uniform slurry dispersion; (2) transport the slurry dispersion to a bead mill through the first pump for grinding; (3) grind the slurry through the bead mill The slurry dispersion is conveyed through the pipeline and the first pump and enters the bead mill again for cyclic grinding; (4) repeating step (3), until the particle size of the slurry dispersion reaches a predetermined range, stop grinding; ( 5) The slurry dispersion reaching the predetermined particle size is the nanocrystalline microsphere additive mother liquor, and the nanocrystalline microsphere additive mother liquor is diluted and dispersed to prepare the nanocrystalline microsphere additive. The preparation method of the present invention can carry out circular grinding and continuous feeding of the slurry dispersion, and the nano-bead mill adopted can be designed without a screen, which solves the problem that the existing bead mill system cannot meet the requirement that the powder grinding particle size reaches nanometer level, Moreover, the technical problems of continuous feeding production and low output are not possible.

Description

technical field [0001] The invention belongs to the field of nano-powder milling and dispersing, and in particular relates to a nano-crystalline microsphere additive and a preparation method thereof. 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] Due to various factors such as small market capacity and high entry threshold, the electrolytic manganese dioxide industry is less affected by the international and domestic economic crisis, and the relative declin...

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.

[0005] The bead mill used in the existing preparation process of nanocrystalline microsphere additives has a precise screen, its function is to make the slurry flow out from the screen, and the grinding beads are blocked by the screen and continue to flow in the chamber. work, but the bead mill has requirements for the gap of the screen, 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, and there are already 0.015mm Beads, the uniform gap of the screen is only 0.007mm, which is very difficult to manufacture, 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

In addition, the existing nanocrystalline microsphere additive preparation process is single-tank (barrel) circular grinding during grinding, which cannot be continuously fed and output. Only one groove (barrel) that passes the grinding can be discharged to the next barrel. (groove) milling with lower output and wider particle size distribution of the abrasive

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