Preparation method of ceramic granules

A technology of ceramsite and disc granulator, which is applied in the field of ceramsite manufacturing, can solve the problems of ceramsite and low strength that cannot be used for high-strength oil fracturing proppant, and achieve obvious economic and environmental benefits. The effect of high strength and low water absorption

Inactive Publication Date: 2011-05-18
SHAANXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ceramsite prepared by this method can only be used as building filler, and its strength is low, so it cannot be used as a high-strength oil fracturing proppant ceramsite.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, the first step: molding and bisque firing of ceramsite: first, according to mass fraction, 80% fly ash, 18% kaolin, 1% ferric oxide of chemical purity and 1% chemical purity Put basic magnesium carbonate into a ball mill, add water, wet mill for 3 hours, and then pass the slurry through a 300-mesh standard sieve; secondly, dry and crush the slurry to form powder A for preparing ceramsite; then, add powder A to the disc manufacturing In the granulator, atomized distilled water with a mass fraction of 10% of the powder A is sprayed, and the powder A is made into spherical particles with a particle size of 40 mesh or less; finally, the spherical particles are put into a muffle furnace and subjected to the following temperature. Firing: from room temperature to 150°C at a heating rate of 1°C / min, and hold for 1 hour; then raise the temperature to 900°C at a heating rate of 2°C / min, keep warm for 1 hour, and then naturally cool to room temperature to make bisque...

Embodiment 2

[0021] Embodiment 2, the first step: molding and bisque firing of ceramsite: first, according to mass fraction, 81% fly ash, 13% kaolin, 5% chemically pure ferric oxide and 1% chemically pure Put basic magnesium carbonate into a ball mill, add water, wet mill for 3 hours, and then pass the slurry through a 300-mesh standard sieve; secondly, dry and crush the slurry to form powder A for preparing ceramsite; then, add powder A to the disc manufacturing In the granulator, atomized distilled water with a mass fraction of 13% of the powder A is sprayed, and the powder A is made into spherical particles with a particle size below 40 mesh; finally, the spherical particles are put into a muffle furnace and subjected to the following temperature. Firing: from room temperature to 150°C at a heating rate of 1°C / min, and hold for 1.5 hours; then raise the temperature to 900°C at a heating rate of 4°C / min, keep warm for 2 hours, and then cool naturally to room temperature to make bisque fir...

Embodiment 3

[0026] Embodiment 3, the first step: molding and bisque firing of ceramsite: first, put 82% fly ash, 15% kaolin and 3% ferric oxide of chemical purity into the ball mill and add water according to the mass fraction After wet milling for 3 hours, pass the slurry through a 300-mesh standard sieve; secondly, dry and crush the slurry to form powder A for preparing ceramsite; Atomize distilled water with a fraction of 15%, and make powder A into spherical particles with a particle size below 40 mesh; finally, put the spherical particles into a muffle furnace for bisque firing at the following temperature: from room temperature at 2°C / min Raise the heating rate to 150°C and keep it warm for 2 hours; then raise the temperature to 900°C at a heating rate of 4°C / min, keep it warm for 2 hours and then cool it down to room temperature naturally to make bisque fired ceramsite;

[0027] Step 2: Preparation and wrapping of glass-ceramic powder: First, make the expansion coefficient less tha...

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PUM

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Abstract

The invention relates to a preparation method of ceramic granules, which comprises the following steps: drying and crushing coal ash, kaolin, ferric oxide and basic magnesium carbonate into powder after wet grinding; carrying out the biscuit firing treatment on the powder to prepare biscuit-firing granules after spherical granules are prepared; preparing microcrystal glass powder by utilizing an Li-Al-Si system; pouring the prepared microcrystal glass powder into a granulator to be stirred; preparing the biscuit-firing granules packaged by the microcrystal glass powder after the surface of the biscuit-firing granules is completely packaged by the microcrystal glass powder; placing the biscuit-firing granules packaged by the microcrystal glass powder into the granulator; adding the powder;preparing the ceramic granules to be treated through the biscuit firing after the biscuit-firing granules packaged by the microcrystal glass powder are completely packaged by the powder; and preparing the ceramic granules after the ceramic granules to be treated through the biscuit firing are placed into a muffle furnace to be sintered and crushed. In the invention, a packaging method is adopted to prepare the ceramic granules, the inner layer of the prepared ceramic granules is completely packaged by the glass powder, and the gas of the inner layer is prevented from discharging in the sintering course so that the inner layer is in a loose porous structure, thereby greatly reducing the water absorption rate of the ceramic granules and decreasing the specific gravity.

Description

technical field [0001] The invention relates to a method for manufacturing ceramsite, in particular to a method for preparing high-strength ceramsite. Background technique [0002] Ceramsite, as the name suggests, is ceramic particles. Most of the appearance characteristics of ceramsite are round or elliptical spheres, but there are also some gravel-like ceramsites that are not round or elliptical spheres, but irregular gravel. The appearance and color of ceramsite vary with the raw materials and techniques used. The color of roasted ceramsite is mostly dark red and ocher red, and some special varieties are gray-yellow, gray-black, gray-white, blue-gray, etc. The particle size of ceramsite is generally 5-20mm, and the maximum particle size is 25mm. Ceramsite is generally used to replace gravel and pebbles in concrete. [0003] Because there are many raw materials for the production of ceramsite, and there are many varieties of ceramsite, so there are many colors. Due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00
Inventor 郭宏伟李文福谭树英刘新年高档妮周小华盖言成刘盼
Owner SHAANXI UNIV OF SCI & TECH
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