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Preparation method of calcium carbonate special for sealant

A technology of calcium carbonate and sealant, applied in the field of calcium carbonate, can solve the problems of poor particle diameter control and unstable sealant quality, and achieve the effect of stable quality

Inactive Publication Date: 2013-01-16
CHIZHOU DAHENG BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Calcium carbonate has many functions and is widely involved in all aspects of the national economy and people's livelihood. Among them, the calcium carbonate used in sealants has high requirements on particle size. The traditional production method does not control the particle diameter effectively, resulting in unstable sealant quality.

Method used

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Experimental program
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Effect test

Embodiment Construction

[0016] Below, the present invention will be further described in conjunction with specific embodiments:

[0017] The present invention is achieved like this: a kind of special calcium carbonate preparation method for sealant, it comprises

[0018] In the first step, the 500-mesh Dafangjie calcium carbonate raw material is mixed with water, wherein the ratio of water to raw material is 1:3;

[0019] The second step is to filter the slurry to remove impurities;

[0020] The third step is to grind, keep the slurry temperature at 80°C±2°C during the grinding process, and control the particle size so that D50=1.00um, D97=1.8um, D98=1.90um;

[0021] The fourth step is to put the qualified slurry into the fluidized bed for drying;

[0022] The fifth step is to pulverize the dried powder;

[0023] The sixth step is to modify the surface of the synthesized surfactant; the surfactant used is animal fat hard fat plus aluminum-titanium composite coupling agent, and the amount is 4 / ...

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Abstract

The invention relates to calcium carbonate, in particular to a preparation method of calcium carbonate. A preparation method of calcium carbonate special for sealant includes: step one, mixing 500-mesh calcite calcium carbonate with water, wherein the ratio of water to the calcium carbonate is 1:3; step two, filtering slurry and removing impurities; step three, grinding, keeping the temperature of the slurry to be 80+ / -2 DEG C during grinding, and controlling particle size to satisfy equations that D50=1.00um, D97=1.8um and D98=1.90um; step four, feeding qualified ground slurry into a fluidized bed for drying; step five, crushing dried powder; step six, subjecting synthesized surfactant to surface modification; step seven, re-powdering the modified powder; and step eight, screening and packaging. The particle size of the calcium carbonate meets the requirements.

Description

technical field [0001] The invention relates to calcium carbonate, in particular to a preparation method of calcium carbonate. Background technique [0002] Calcium carbonate has many functions and is widely involved in all aspects of the national economy and people's livelihood. Among them, the calcium carbonate used in sealants has high requirements on particle size. Traditional production methods do not control the particle diameter effectively, resulting in unstable sealant quality. Contents of the invention [0003] The invention aims to overcome the defects of the prior art and provides a method for preparing calcium carbonate special for sealant. The particle size of the product of the present invention meets the requirements. [0004] In order to solve the above-mentioned technical problems, the present invention is achieved in that a kind of preparation method of calcium carbonate special for sealant, it comprises [0005] In the first step, the 500-mesh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/04C09C3/08
Inventor 潘俊杰
Owner CHIZHOU DAHENG BIOCHEM