Production method of high-quality superfine light calcium carbonate

A light calcium carbonate and production method technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve the problems affecting the performance of ultrafine light calcium carbonate, wide particle size range, Problems such as high slurry viscosity

Inactive Publication Date: 2017-12-01
广西华洋矿源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many ways to prepare superfine calcium carbonate. However, in the existing production methods, the produced calcium carbonate has a large strength, a wide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A production method of high-quality superfine light calcium carbonate, comprising the following steps:

[0024] (1) take limestone as raw material, put into reaction furnace and heat and calcinate to obtain calcium oxide, seal after cooling for subsequent use;

[0025] (2) Calcium oxide is added into impurity-free water, stirred for 2 hours, and the calcium hydroxide slurry is obtained after cooling down;

[0026] (3) carbon dioxide gas is passed into the calcium hydroxide slurry at room temperature for carbonization, and the calcium hydroxide slurry is carbonized to a pH of 6.5 to obtain a calcium carbonate slurry and stop carbonization;

[0027] (4) put the calcium carbonate slurry that step (3) obtains into storage tank and leave standstill 10h, make its pH value stabilize;

[0028] (5) the calcium carbonate slurry of step (4) is added to each component of following and calcium carbonate weight ratio respectively: the triethanolamine of 1%, the sodium pyrophosphate ...

Embodiment 2

[0037] A production method of high-quality superfine light calcium carbonate, comprising the following steps:

[0038] (1) take limestone as raw material, put into reaction furnace and heat and calcinate to obtain calcium oxide, seal after cooling for subsequent use;

[0039] (2) Calcium oxide is added into impurity-free water, stirred for 3 hours, and the calcium hydroxide slurry is obtained after cooling down;

[0040] (3) Pass carbon dioxide gas into the calcium hydroxide slurry at room temperature for carbonization, carbonize the calcium hydroxide slurry to a pH of 7, obtain the calcium carbonate slurry, and stop carbonization;

[0041] (4) put the calcium carbonate slurry that step (3) obtains into storage tank and leave standstill 11h, make its pH value stabilize;

[0042] (5) the calcium carbonate slurry of step (4) is added respectively to each component of following and calcium carbonate weight ratio: 2% triethanolamine, 1% sodium pyrophosphate, 0.8% sodium polyacryl...

Embodiment 3

[0051] A production method of high-quality superfine light calcium carbonate, comprising the following steps:

[0052] (1) take limestone as raw material, put into reaction furnace and heat and calcinate to obtain calcium oxide, seal after cooling for subsequent use;

[0053] (2) Calcium oxide is added into impurity-free water, stirred for 4 hours, and the calcium hydroxide slurry is obtained after cooling down;

[0054] (3) carbon dioxide gas is passed into the calcium hydroxide slurry at room temperature for carbonization, and the calcium hydroxide slurry is carbonized to a pH of 7.5 to obtain a calcium carbonate slurry and stop carbonization;

[0055](4) put the calcium carbonate slurry that step (3) obtains into storage tank and leave standstill 12h, make its pH value stabilize;

[0056] (5) the calcium carbonate slurry of step (4) is added respectively to each component of following and calcium carbonate weight ratio: 3% triethanolamine, 1.2% sodium pyrophosphate, 0.9% s...

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Abstract

The invention discloses a production method of high-quality ultrafine light calcium carbonate, belonging to the technical field of calcium carbonate production. A production method of high-quality ultrafine light calcium carbonate is characterized in that it comprises the following steps: (1) using limestone as raw material, putting it into a reaction furnace for heating and calcining to obtain calcium oxide, and sealing it for later use after cooling; Calcium is added to impurity-free water, stirred for 2-4h, and calcium hydroxide slurry is obtained after cooling down; (3) Carbon dioxide gas is introduced into the calcium hydroxide slurry at room temperature for carbonization, and carbonized to the pH of the calcium hydroxide slurry It is 6.5-7.5, obtains calcium carbonate slurry, stops carbonization; (4) puts the calcium carbonate slurry that step (3) obtains into storage tank and leaves standstill 10-12h, makes its pH value stabilize. The object of the present invention is to provide a production method of high-quality ultrafine light calcium carbonate, which is simple in operation, stable in quality, and capable of efficiently preparing high-quality ultrafine light calcium carbonate.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate production, and in particular relates to a production method of high-quality ultrafine light calcium carbonate. Background technique [0002] Calcium carbonate is a widely used inorganic salt industrial product. It can be used as a filling and modification material in plastics, rubber, paint, adhesives, papermaking, food processing, pharmaceuticals and other industries. It is closely related to people's daily life. Relationship. There are many ways to prepare superfine calcium carbonate. However, in the existing production methods, the produced calcium carbonate is relatively strong, with a wide range of particle sizes and uneven distribution. The resulting slurry has high viscosity and poor stability. Affects the performance of ultra-fine lightweight calcium carbonate. Contents of the invention [0003] The object of the present invention is to provide a production method of high-qu...

Claims

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Application Information

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IPC IPC(8): C01F11/18
CPCC01F11/181C01F11/182C01F11/183
Inventor 李文康张宸宇欧西江
Owner 广西华洋矿源材料有限公司
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