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A kind of preparation method of high-purity nano quartz powder

A nano-quartz powder, high-purity technology, used in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of stable performance, less impurities, and simple preparation methods

Active Publication Date: 2022-05-13
江西省矿产资源保障服务中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to different ore-forming geological conditions, its purification technology and equipment are the biggest bottleneck restricting the large-scale mining of silica minerals

Method used

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  • A kind of preparation method of high-purity nano quartz powder
  • A kind of preparation method of high-purity nano quartz powder
  • A kind of preparation method of high-purity nano quartz powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 1. Using the new minerals analyzed above as raw materials, mix them evenly with zirconia ceramic balls and water at a mass ratio of 1:4:0.8, and add a sodium polycarboxylate dispersant with a new mineral content of 0.1%, in a media stirring mill Grinding for 4 hours; the diameter of zirconia ceramic media is 0.8-2.0mm, making the powder d 50 90 <20μm, get dispersed slurry;

[0065] 2. Separate the prepared dispersion slurry from the ceramic medium, add deionized water to the dispersion slurry, adjust the solid content to 1%, add new-type mineral content of 5% absolute ethanol, let it stand for 30 minutes, and take the upper slurry ;

[0066] 3. Put the upper layer slurry in a glass container, add sodium hypochlorite 3 times the mass of the upper layer slurry to oxidize and remove carbon, the temperature is 30°C, and the time is 100h, to obtain the reaction slurry;

[0067] 4. Centrifuge the reaction slurry at 10,000r / min for 3 minutes with a high-speed centrifuge, pou...

Embodiment 2

[0074] 1. Using new minerals from Fengcheng County, Yichun City, Jiangxi Province as raw materials, mix the new minerals with zirconia ceramic balls and water at a mass ratio of 1:5:2.0, and add sodium polycarboxylate with a new mineral content of 1.0% Dispersant, grind in a media stirring mill for 40min; the diameter of the zirconia ceramic medium is 0.8-2.0mm, making the powder d 50 90 <20μm, get dispersed slurry;

[0075] 2. Separate the prepared dispersion slurry from the ceramic medium, add deionized water to the dispersion slurry, adjust the solid content to 5%, add 30% of the new mineral content of absolute ethanol, let it stand for 10 minutes, and take the upper slurry material;

[0076] 3. Put the upper layer slurry in a glass container and add ClO with 5 times the mass of the upper layer slurry 2 Carry out oxidation and carbon removal at a temperature of 95°C for 2 hours to obtain a reaction slurry;

[0077] 4. Use a high-speed centrifuge to centrifuge the reactio...

Embodiment 3

[0082] 1. Using new minerals from Fengcheng County, Yichun City, Jiangxi Province as raw materials, mix the new minerals with zirconia ceramic balls and water at a mass ratio of 1:4.5:1.0, and add sodium polycarboxylate with a new mineral content of 0.5% Dispersant, grind in a media stirring mill for 2 hours; the diameter of the zirconia ceramic medium is 0.8-2.0mm, and the powder d 50 90 <20μm, get dispersed slurry;

[0083] 2. Separate the prepared dispersion slurry from the ceramic medium, add deionized water to the dispersion slurry, adjust the solid content to 3%, add 20% of the new mineral content of absolute ethanol, let it stand for 20 minutes, and take the upper slurry material;

[0084] 3. Put the upper layer slurry in a glass container, add a mixture of sodium hypochlorite and hydrogen peroxide 4 times the mass of the upper layer slurry to oxidize and remove carbon, the temperature is 90 ° C, and the time is 4 hours to obtain a reaction slurry;

[0085] 4. Use a h...

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Abstract

The invention generally belongs to the field of inorganic non-metallic materials, and in particular relates to a preparation method of high-purity nano-quartz powder. The preparation method uses new minerals as raw materials, and first adds a dispersant for the first grinding pretreatment to obtain small molecular particles, which is conducive to subsequent separation and removal of impurities; and then adds absolute ethanol and deionized water to obtain a suspension to accelerate the carbon sedimentation rate. The flocculated carbon will settle in the lower layer of the suspension, and then add an oxidant for decarburization treatment to effectively remove carbon; after that, the suspended silica particles are collected by high-speed centrifugation, washed with acid solution to remove inorganic impurities; finally, nano High-purity nano-quartz powder can be obtained by chemical grinding. The method of the present invention is simple to prepare, easy to operate, low in energy consumption and low in cost, uniform in particle size, and the prepared high-purity nano-quartz powder d 90 <100nm, SiO 2 The content is greater than 99.9%, and can be widely used in various fields such as biology, medicine, construction, spices, fiber and energy storage.

Description

technical field [0001] The invention generally belongs to the field of inorganic non-metallic materials, and in particular relates to a preparation method of high-purity nano-quartz powder. Background technique [0002] Quartz is a non-metallic mineral with abundant reserves, with a Mohs hardness of 7, strong acid resistance, and excellent electrical insulation. Ultrafine quartz powder is a high-quality neutral inorganic filler, which is widely used in industries such as plastics, rubber, coatings, electronics and high-tech products. strict requirements. The application fields of nano-quartz powder are very extensive, almost involving all the original SiO 2 Powder industry, such as the original must use SiO 2 Products made of powder materials as fillers. While not changing its original process flow, switch to nano-SiO 2 As a filler, the functions and performance indicators of its products will be greatly improved. [0003] At present, there are two main ways to prepare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/18B82Y30/00B82Y40/00
CPCC01B33/18B82Y30/00B82Y40/00C01P2004/64C01P2002/72C01P2002/88C01P2004/03
Inventor 王先广杜高翔唐绍文黄秋芸詹天卫
Owner 江西省矿产资源保障服务中心