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Nano sericite and preparation method thereof

A sericite and nano-technology, applied in the field of nano-sericite and its preparation, to achieve good flow properties

Inactive Publication Date: 2019-05-21
安徽格锐新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing sericite products also have certain defects, so their components need to be improved to improve the quality of papermaking as much as possible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A nano-sericite, comprising the following components by weight: 43-50 parts of silicon dioxide, 28-38 parts of aluminum hydroxide, 3-5 parts of potassium oxide, 6-9 parts of sodium oxide, and 8-10 parts of dispersant , 1-5 parts of bleach and 0-1 part of water.

[0021] Wherein, the dispersant is anionic polyacrylamide, and the bleaching agent is any one of sodium dithionite, sodium metaphosphate, and sodium polyacrylate, preferably sodium polyacrylate.

[0022] The process for preparing the above-mentioned nano-sericite specifically comprises the steps:

[0023] (1) Put the dried schist sericite ore into the jaw crusher for coarse crushing to form sericite coarse particles, so that the particle size of sericite coarse particles is <5cm;

[0024] (2) Feed sericite coarse grains into a double roller machine for crushing to form sericite coarse ore powder of about 200 mesh;

[0025] (3) Mix sericite coarse ore powder and deionized water to form primary slurry and send i...

Embodiment 2

[0032] A nano-sericite, comprising the following components by weight: 43-50 parts of silicon dioxide, 28-38 parts of aluminum hydroxide, 3-5 parts of potassium oxide, 6-9 parts of sodium oxide, and 8-10 parts of dispersant , 1-5 parts of bleach, 1-3 parts of strong oxidizing agent and 0-1 part of water.

[0033] Wherein, the dispersant adopts anionic polyacrylamide, the bleaching agent adopts any one of sodium dithionite, sodium metaphosphate, and sodium polyacrylate, and the strong oxidant adopts L-ascorbic acid. Sodium polyacrylate is preferably used as bleaching agent.

[0034] The process for preparing the above-mentioned nano-sericite specifically comprises the steps:

[0035] (1) Put the dried schist sericite ore into the jaw crusher for coarse crushing to form sericite coarse particles, so that the particle size of sericite coarse particles is <5cm;

[0036] (2) Feed sericite coarse grains into a double roller machine for crushing to form sericite coarse ore powder o...

Embodiment 3

[0044] A nano-sericite, comprising the following components by weight: 43-50 parts of silicon dioxide, 28-38 parts of aluminum hydroxide, 3-5 parts of potassium oxide, 6-9 parts of sodium oxide, and 8-10 parts of dispersant , 1-5 parts of bleach, 1-3 parts of strong oxidizing agent and 0-1 part of water.

[0045] Wherein, the dispersant adopts anionic polyacrylamide, the bleaching agent adopts any one of sodium dithionite, sodium metaphosphate, and sodium polyacrylate, and the strong oxidant adopts L-ascorbic acid. Preference is given to using sodium dithionite as the bleaching agent.

[0046] The process for preparing the above-mentioned nano-sericite specifically comprises the steps:

[0047] (1) Put the dried schist sericite ore into the jaw crusher for coarse crushing to form sericite coarse particles, so that the particle size of sericite coarse particles is <5cm;

[0048](2) Feed sericite coarse grains into a double roller machine for crushing to form sericite coarse o...

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PUM

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Abstract

The invention relates to a nano sericite and a preparation method thereof. The nano sericite is prepared from, 43-50 parts of silica, 28-38 parts of aluminum hydroxide, 3-5 parts of potassium oxide, 6-9 parts of sodium oxide, 8-10 parts of a dispersant, 1-5 parts of a bleaching agent, 1-3 parts of a strong oxidant and 0-1 part of water. The preparation methods of nano sericite includes the following steps that coarse crushing of schist sericite ore, dual-roll crushing to form crude sericite powder, quartz ore separation, acid washing and bleaching, striping and untrafining, viscosity modification, and screening qualified products by airflow classification of superfine grinding powder. The produced sericite has the advantages of high whiteness and brightness and low viscosity.

Description

technical field [0001] The invention relates to the technical field of mica powder production, in particular to a nano-sericite and a preparation method thereof. Background technique [0002] Sericite is a natural non-metallic mineral material, which belongs to the subspecies of muscovite. It is a kind of natural fine-grained muscovite. Its crystals are scaly and silky, with a specific gravity of 2.6~2.7 g / cm 3 , hardness 2~3, the structure is a compound silicon-oxygen layer composed of two layers of silicon-oxygen tetrahedron sandwiching a layer of aluminum-oxygen octahedron, which is a layered silicate. Due to its unique chemical composition and structural characteristics, sericite has some special properties, such as being split into extremely thin sheets, having a large diameter-to-thickness ratio, high elasticity, and bendable (elastic modulus of 1,505~2,134MPa) ;Excellent electrical insulation, volume resistivity 10 13-15 Ω∙cm, relative dielectric constant 5~7, brea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/04C09C3/06C09C3/08C09C3/10B82Y30/00B82Y40/00
Inventor 朱朋利吕化奇王家俊王凯柴修安
Owner 安徽格锐新材料科技有限公司
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