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Wet-to-dry dispersant-free method for producing ultrafine nanoscale dry powder and involved device

An ultra-fine nanotechnology, production method, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, which can solve the problem of equipment energy consumption and parts loss, high temperature caused by equipment grinding, and increased maintenance costs. and other problems, to achieve the effect of improving quality, improving operation speed, and improving product quality

Inactive Publication Date: 2013-08-28
薛运河
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when using the wet method to produce nanomaterials, a dispersant must be added to prevent the agglomeration of the material, but the product added with a dispersant will limit its application in high-tech industries
[0004] When using the dry method to produce nanomaterials, the addition of grading components to the production equipment will increase the investment cost and increase the maintenance cost; moreover, the grinding of the equipment in the dry method will generate high temperature, and the energy consumption of the equipment and the loss of parts will be large

Method used

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  • Wet-to-dry dispersant-free method for producing ultrafine nanoscale dry powder and involved device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Include the following steps:

[0045] 1) Ingredients: mix the barite ore with water evenly, and the solid weight accounts for 30%-40% of the total weight; the BaSO of the barite ore used 4 ≥98%, particle size 80-100 mesh;

[0046] 2) Grinding: Grinding the material obtained in step 1) through a four-stage circulating grinding system until the D90 is 100nm. The grinding medium used in the grinding process is yttrium-stabilized zirconia beads, and then heated and concentrated until the solid content of the material is ≥ 60%;

[0047] 3) The material obtained in step 2) is dried by ultra-low temperature vacuum sublimation to obtain ultrafine nano-dry powder with a particle size of D90-100nm, and finally packed.

Embodiment 2

[0049] A method for producing ultrafine nano-dry powder without dispersant and wet-to-dry method, comprising the following steps:

[0050] 1) Ingredients: mix the quartz stone ore with water evenly, and the solid weight accounts for 30%-40% of the total weight; the quartz stone ore used is SiO 2 ≥99.99%, particle size 80-100 mesh.

[0051] 2) Grinding: The material obtained in step 1) is ground through a three-stage circulating grinding system until the D90 is 100-300nm. The grinding medium used in the grinding process is yttrium-stabilized zirconia beads, and then heated and concentrated until the solid content of the material is ≥60 %;

[0052] 3) The material obtained in step 2) is vacuum-dried at ultra-low temperature to obtain an ultrafine nano-dry powder with a particle size D90 of 100-300nm, and finally packed.

Embodiment 3

[0054] A method for producing ultrafine nano-dry powder without dispersant and wet-to-dry method, comprising the following steps:

[0055] 1) Ingredients: mix the quartz stone ore with water evenly, and the solid weight accounts for 35% of the total weight; the quartz stone ore used is SiO 2 ≥99.99%, particle size 80-100 mesh.

[0056] 2) Grinding: The material obtained in step 1) is ground through a four-stage circulating grinding system until the D90 is 100nm. The grinding medium used in the grinding process is yttrium-stabilized zirconia beads, and then heated and concentrated until the solid content of the material is ≥ 60%;

[0057] 3) The material obtained in step 2) is vacuum-dried at ultra-low temperature to obtain ultrafine nano-dry powder with a particle size of D90 30-100nm, and finally packed.

[0058] In addition, the method and device provided by the present invention are not only suitable for barite or quartz stone, other water-insoluble inorganic materials or...

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Abstract

The invention discloses a wet-to-dry dispersant-free method for producing ultrafine nanoscale dry powder and an involved device. The method comprises the following steps of grinding materials by a multistage wet grinding technology, carrying out heating concentration, and carrying out ultralow-temperature vacuum-sublimation drying to obtain nanoscale loose uncaked ultrafine dry powder. The nanoscale loose uncaked ultrafine dry powder reaches a domestic even world advanced level. The method adopts conventional equipment, advanced processes and a wet grinding technology, avoids dispersant use, better guarantees product quality and is suitable for popularization.

Description

technical field [0001] The invention relates to the field of nanometer material production; in particular, it relates to a method and a device for producing superfine nanometer dry powder by a wet-to-dry method without using a dispersant. Background technique [0002] Our country still lags behind the international level in the processing of powder materials. Although my country's 863 plan has broken through 5000-8000 purpose production equipment in the research of powder equipment, there is still a big gap compared with developed countries. Especially in the production of nanomaterials, some enterprises in our country adopt the method of combining Chinese and foreign equipment. So far, according to the analysis of published data, there are several companies that produce nanomaterials in my country with a particle size below D90-500nm in wet nano products, and only Foshan Anyi Nano Materials Co., Ltd. in dry powder with D97-900nm. Ltd. has public reports. [0003] In the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00F26B7/00B82Y30/00
Inventor 薛运河
Owner 薛运河
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