Calcium carbonate powder production technology

A production process and technology of calcium carbonate powder, applied in the field of production process of calcium carbonate powder, can solve the problems of affecting grinding efficiency and product quality, easy aggregation of fine powder, low production efficiency, etc., so as to achieve uniform product fineness and reduce Grinding time, low cost effect

Active Publication Date: 2016-05-04
SICHUAN YIXIN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, dry-milled coarse powder is directly configured into slurry, and then wet-milled to produce ultra-fine powder. The product has the characteristics of high output rate, high purity, and uniform particle size distribution. However, dry-milled coarse powder Part of the fine powder in the slurry will be repeatedly ground, resulting in low production efficiency and high energy consumption. At the same time, the fine powder in the slurry is also prone to aggregation during wet grinding, which affects the grinding efficiency and product quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: A kind of production technology of calcium carbonate powder, it comprises the following steps:

[0021] S1. Crushing: wash the calcite with high-pressure water to remove the soil and dust on the surface of the stone, and then crush it with a crusher until the particle size is ≤40mm;

[0022] S2. Homogeneous: Add sodium carbonate and dodecyl dimethyl benzyl ammonium chloride to the pulverized calcite powder and stir for 20min, the rotating speed of the mixer is 800r / min; The weight of methyl benzyl ammonium chloride is 80:1:1;

[0023] S3. Grinding: Add the homogenized calcite powder to a vertical mill for grinding. A water spray device is installed in the vertical mill to spray water during the grinding process to obtain a powder, wherein the vertical mill The grinding temperature is 40°C, the grinding pressure is 8MPa, and the moisture control index of the powder is ≤0.3%;

[0024] S4. Classification treatment: Classify the obtained powder once, the fine ...

Embodiment 2

[0027] Example 2: A kind of production technology of calcium carbonate powder, it comprises the following steps:

[0028] S1. Crushing: wash the calcite with high-pressure water to remove the soil and dust on the surface of the stone, and then crush it with a crusher until the particle size is ≤40mm;

[0029] S2. Homogeneous: Add sodium carbonate and dodecyl dimethyl benzyl ammonium chloride to the pulverized calcite powder and stir for 40min, the rotating speed of the mixer is 1200r / min; The weight of methyl benzyl ammonium chloride is 110:5:1;

[0030] S3. Grinding: Add the homogenized calcite powder to a vertical mill for grinding. A water spray device is installed in the vertical mill to spray water during the grinding process to obtain a powder, wherein the vertical mill The grinding temperature is 50°C, the grinding pressure is 12MPa, and the moisture control index of the powder is ≤0.3%;

[0031] S4. Classification treatment: Classify the obtained powder once, the f...

Embodiment 3

[0034] Example 3: A kind of production technology of calcium carbonate powder, it comprises the following steps:

[0035] S1. Crushing: wash the calcite with high-pressure water to remove the soil and dust on the surface of the stone, and then crush it with a crusher until the particle size is ≤40mm;

[0036] S2. Homogeneous: Add sodium carbonate and dodecyl dimethyl benzyl ammonium chloride to the pulverized calcite powder and stir for 28min, the rotating speed of the mixer is 1000r / min; The weight of methyl benzyl ammonium chloride is 90:2:1;

[0037] S3. Grinding: Add the homogenized calcite powder to a vertical mill for grinding. A water spray device is installed in the vertical mill to spray water during the grinding process to obtain a powder, wherein the vertical mill The grinding temperature is 43°C, the grinding pressure is 9MPa, and the moisture control index of the powder is ≤0.3%;

[0038] S4. Classification treatment: Classify the obtained powder once, the fin...

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PUM

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Abstract

The invention discloses a calcium carbonate powder production technology. The production technology comprises crushing, homogenizing, grinding, grading, wet grinding and drying. Through use of sodium carbonate and dodecyl dimethyl benzyl ammonium chloride in homogenizing, after grinding efficiency is improved and grinding time is reduced. A water spraying device is arranged in a grinder and the sprayed atomized water improves powder weight so that the powder does not easily suspend and a grinding disc material layer is stable. The atomized water, sodium carbonate and dodecyl dimethyl benzyl ammonium chloride produce synergism to promote grinding effects. According to the technology, coarse powder subjected to dry grinding is graded and the graded secondary coarse powder is subjected to wet grinding so that wet grinding efficiency is improved and production unit energy consumption is reduced, the product particle size distribution is narrow and product fineness is uniform. The technology has the advantages of good product quality, high efficiency, simple processes, preparation convenience and low cost and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic mineral materials, in particular to a production process of calcium carbonate powder. Background technique [0002] Ground calcium carbonate, also known as ground calcium, is a powder product made of natural calcite, marble, chalk, etc., which is mechanically crushed and ground to a certain fineness. It is generally called finely ground calcium carbonate (FGCC) internationally. In order to distinguish precipitated calcium carbonate in the paper industry, GCC and PCC are used for abbreviation respectively. Generally, products with an average particle size below 12 μm are called heavy fine calcium carbonate to distinguish general heavy calcium carbonate. Calcium carbonate products are divided into special calcium for granite, special calcium for sealant, special calcium for rubber, special calcium for papermaking, special calcium for plastic, special calcium for paint and coating, special cal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00
CPCB02C21/00
Inventor 彭贵明陈华平雷礼强李林富王晓洪
Owner SICHUAN YIXIN NEW MATERIAL CO LTD
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