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Preparation methods of illite/montmorillonite clay nanometer slurry and illite/montmorillonite clay nanometer powder

A technology of nano-powder and smectite, applied in the field of development and preparation of nano-materials, can solve problems such as inability to prepare, and achieve the effects of reducing agglomeration, good stability and high dispersion efficiency

Inactive Publication Date: 2015-02-25
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defect that existing physical methods cannot prepare nanoscale I / Mongolian clay nano-slurries and powders, the purpose of the present invention is to provide a preparation method for I / Mongolian clay nano-slurries and powders. Il / Mongolian clay nano-powder obtained by powder preparation method has good uniformity and dispersibility

Method used

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  • Preparation methods of illite/montmorillonite clay nanometer slurry and illite/montmorillonite clay nanometer powder
  • Preparation methods of illite/montmorillonite clay nanometer slurry and illite/montmorillonite clay nanometer powder
  • Preparation methods of illite/montmorillonite clay nanometer slurry and illite/montmorillonite clay nanometer powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Dry crushing: Mechanically crush natural Illuminate / Mongolian clay minerals into small pieces of Illuminate mixed layer clay minerals with a particle size of less than 5cm;

[0042] 2) Soaking: Soak the Ilmen-Mongolian mixed layer clay ore pieces obtained in step 1) with water for 12 hours to obtain Il / Mongolian clay slurry; the total mass of the slurry is 100%, wherein the solid content in the slurry is 45wt%;

[0043] 3) Pounding: Use 0.1mol / L NaOH solution to adjust the pH value of the Iraqi / Mongolian clay slurry to 8, add WF-211 dispersant, and use a sand mill disperser to disperse the slurry; among them, WF-211 disperses The addition of agent is 3wt% of solid content in the described slurry; The rotating speed of sand mill disperser is 1000rpm, and stirring time is 60min;

[0044] 4) Screening: pass the slurry after step 3) pounding and dispersion through a 500-mesh sieve to obtain the under-screen slurry;

[0045] 5) Iron removal: use a high gradient magnetic...

Embodiment 2

[0054] 1) Dry crushing: Mechanically crush natural Illuminate / Mongolian clay minerals into small pieces of Illuminate mixed layer clay minerals with a particle size of less than 5cm;

[0055] 2) Soaking: Soak the Ilmen-Mongolian mixed-layer clay ore pieces obtained in step 1) with water for 24 hours to obtain Il / Mongolian clay slurry; the total mass of the slurry is 100%, wherein the solid content in the slurry is 45wt%;

[0056] 3) Slurry: add 0.1mol / L NaOH solution to adjust the pH value of the Iraqi / Mongolian clay slurry to 10, add WF-211 dispersant, and use a sand mill disperser for slurry dispersion; among them, WF-211 dispersant The addition of agent is 1wt% of solid content in the described slurry; The rotating speed of sand mill disperser is 700rpm, and stirring time is 30min;

[0057] 4) Screening: pass the slurry after step 3) pounding and dispersion through a 500-mesh sieve to obtain the under-screen slurry;

[0058] 5) Iron removal: Use a high gradient magnetic s...

Embodiment 3

[0067] 1) Dry crushing: Mechanically crush natural Illuminate / Mongolian clay minerals into small pieces of Illuminate mixed layer clay minerals with a particle size of less than 5cm;

[0068] 2) Soaking: soak the block of Ilmen-Mongolian mixed-layer clay ore obtained in step 1) with water for 20 hours to obtain Il / Mongolian clay slurry; the total mass of the slurry is 100%, wherein the solid content in the slurry is 45wt%;

[0069] 3) Slurry: add 0.1mol / L NaOH solution to adjust the pH value of the Iraqi / Mongolian clay slurry to 9, add WF-211 dispersant, and use a sand mill disperser for slurry dispersion; among them, WF-211 dispersant The addition of agent is 2wt% of solid content in the described slurry; The rotating speed of sand mill disperser is 800rpm, and stirring time is 45min;

[0070] 4) Screening: pass the slurry after step 3) pounding and dispersion through a 500-mesh sieve to obtain the under-screen slurry;

[0071] 5) Iron removal: use a high gradient magnetic ...

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Abstract

The invention discloses preparation methods of illite / montmorillonite clay nanometer slurry and illite / montmorillonite clay nanometer powder and belongs to the field of development and preparation of nanometer materials. The preparation method of the illite / montmorillonite clay nanometer powder comprises the following steps: (1) mechanically breaking natural illite / montmorillonite clay mineral; (2) soaking in water so as to obtain illite / montmorillonite clay slurry; (3) adjusting the pH value of the illite / montmorillonite clay slurry, puddling and dispersing; (4) sieving the puddled and dispersed slurry by using a 50-mesh sieve; (5) removing iron from the slurry; (6) chemically bleaching the slurry; (7) grinding the bleached slurry by adopting a high-energy density stirred mill so as to obtain nanometer slurry; (8) adding a dispersing agent to the nanometer slurry to carry out dispersing treatment; (9) adding a modifying agent to the slurry to carry out swelling treatment; (10) evaporating and drying; and (11) carrying out mechanical pulverization so as to obtain the illite / montmorillonite clay nanometer powder in the end. The illite / montmorillonite clay nanometer powder prepared by the method can reach the nanoscale and has good powder uniformity and dispersity.

Description

technical field [0001] The invention relates to a preparation method of illite / mongolan clay nano slurry and powder, and belongs to the field of development and preparation of nano materials. Background technique [0002] Il / Mongolian clay is a new non-metallic mineral material. At present, the research on Il / Mongolian clay is mainly related to the geological field, and almost no one pays attention to the preparation, drying and modification of Ilmon nanoclay powder. However, due to the characteristics of easy mining, large storage capacity, low price and natural flakes, the application value of Yi / Mongolian clay in traditional industries such as building materials and light industry and modern industrial development has attracted more and more attention. The methods for preparing nanoclays can be specifically divided into physical methods and chemical synthesis methods. At present, materials can be processed to the nanometer level basically by chemical synthesis, but this ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40B82Y30/00B82Y40/00
Inventor 潘志东王燕民邱金勇向龙华黄岩
Owner SOUTH CHINA UNIV OF TECH
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