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High-strength hollow ceramsite and preparation method thereof

A high-strength ceramsite and cavity technology, which is applied to ceramic products, clay products, and other household appliances, can solve the problems of high energy consumption for sintering and high packing density of sintered ceramsite, and achieve reduced preparation costs, good performance, and less clay The effect of resource application

Active Publication Date: 2020-02-07
GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of high bulk density of sintered ceramsite and high energy consumption of sintering, etc., and provides a high-strength cavity ceramsite and its preparation method, and at the same time realizes the resource utilization of solid waste such as fly ash

Method used

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  • High-strength hollow ceramsite and preparation method thereof
  • High-strength hollow ceramsite and preparation method thereof
  • High-strength hollow ceramsite and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a preparation method of high-strength cavity ceramsite, such as figure 2 shown, including the following steps:

[0040] (1) According to the ratio of raw materials, the cavity pore forming agent and the coating agent are added into the mixer and mixed evenly;

[0041] (2) Add the mixture and remaining other raw materials in the step (1) to the granulator, and add an appropriate amount of water to granulate;

[0042] (3) Add the prepared granules into a sintering machine for sintering, and the sintering temperature is 1000-1200°C;

[0043] (4) Quenching the sintered ceramsite, and cooling naturally to obtain the finished product of ceramsite.

[0044] Specifically, in step (1), the rotational speed of the mixer is ≥1000r / min.

[0045] Specifically, the quenching temperature in step (4) is 500-900°C.

[0046] Specifically, the preparation method of the coating agent is: add feldspar, bauxite, calcined kaolin, manganese powder and wat...

Embodiment 1

[0050] A high-strength cavity ceramsite, prepared from the following raw materials in mass fractions, fly ash 21.3wt%, coal gangue 58.7wt%, slag 8.6wt%, illite 2wt%, wollastonite 2.8wt%, naphthalene series 0.2wt% superplasticizer; 1wt% coating agent; 5.4wt% polyurethane.

[0051] The coating agent consists of 10 parts by weight of feldspar, 16 parts by weight of bauxite, 18 parts by weight of calcined kaolin, 2.1 parts by weight of manganese powder, 51 parts by weight of water and 2.9 parts by weight of vinyltriethoxysilane (A151) prepared.

[0052] The preparation method of the high-strength cavity ceramsite in the present embodiment comprises the following steps:

[0053] (1) According to the ratio of raw materials, polyurethane and coating agent are added into the mixer and mixed evenly, and the speed of the mixer is 1000r / min;

[0054] (2) Add the mixture and remaining other raw materials in the step (1) to the granulator, and add an appropriate amount of water to granul...

Embodiment 2

[0059] A high-strength cavity ceramsite, prepared from the following raw materials in mass fractions, fly ash 37.5wt%, coal gangue 39.2wt%, slag 5.8wt%, china clay 3.2wt%, diopside 3.8wt%, fatty acid system 0.4wt% superplasticizer; 1.7wt% coating agent; 8.4wt% polystyrene.

[0060] The coating agent is prepared from 19.6 parts by weight of feldspar, 10.1 parts by weight of bauxite, 5.2 parts by weight of calcined kaolin, 7.8 parts by weight of manganese powder, 53.7 parts by weight of water and 3.6 parts by weight of silane coupling agent .

[0061] The preparation method of the high-strength cavity ceramsite in the present embodiment comprises the following steps:

[0062] (1) According to the ratio of raw materials, polystyrene and coating agent are added into the mixer and mixed evenly, and the speed of the mixer is 2000r / min;

[0063] (2) Add the mixture and remaining other raw materials in the step (1) to the granulator, and add an appropriate amount of water to granula...

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Abstract

The invention relates to the field of solid waste recycle and in particular to a high-strength hollow ceramsite and a preparation method thereof. For solving the problems such as high stacking densityand high sintering energy consumption of existing sintered ceramsites, the invention provides a high-strength hollow ceramsite and a preparation method thereof, and meanwhile, the recycle of solid wastes such as coal ash is realized. The high-strength hollow ceramsite disclosed by the invention takes a film covering agent as a composite layer, so that the problem that a hollow pore forming agenton an organic layer cannot be bonded with a mineral material on an inorganic layer to result in pelletizing difficulty is solved; and meanwhile, the film covering agent is attached to the inner side of the inorganic layer after being melted in a high-temperature state, so that a cavity inside the hollow ceramsite is stopped from absorbing water, and the water absorption rate of the hollow ceramsite is greatly reduced. Due to the adoption of the internal cavity structure , the sintering temperature and the stacking density of the ceramsite are also reduced. The ceramsite is prepared by taking the solid wastes such as coal ash, gangue and mineral slag as raw materials, so that an effective approach is provided for the recycle of the solid wastes; in addition, the raw materials of the ceramsite are available, so that the preparation cost of the ceramsite is reduced.

Description

technical field [0001] The invention relates to the field of solid waste reuse, in particular to a high-strength cavity ceramsite and a preparation method thereof. Background technique [0002] Among the existing ceramsites, clay ceramsites account for the vast majority. With the rapid development of society and economy, human beings have over-exploited the soil, resulting in less and less arable soil, especially for my country, a country with many people and little land. In terms of soil, the reduction of arable soil will lead to a decline in crop yields, seriously affecting the economic development of our country. Therefore, it is necessary to find a raw material that can replace clay to prepare ceramsite. [0003] Fly ash, coal gangue, slag and other solid wastes are piled up in a large amount in my country and their utilization rate is low. Long-term stacking will cause environmental pollution and endanger human health. Therefore, it is necessary to provide new ways for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/135C04B33/132C04B33/13C04B33/04C04B33/32
CPCC04B38/067C04B33/1352C04B33/132C04B33/13C04B33/04C04B33/323C04B38/009C04B2235/3463C04B2235/3217C04B2235/40C04B2235/77C04B2235/96C04B38/0067Y02P40/60
Inventor 张宏生窦明岳王光
Owner GUANGDONG TSINGDA TONGKE ENVIRONMENTAL PROTECTION TECH CO LTD
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