Method for preparing ceramic handicraft by utilizing dried sludge

A technology of ceramic handicrafts and dried sludge, which is applied in the production and application of clay products and ceramic materials, can solve the problems of complex preparation process, poor performance of ceramic products, high cost, etc., and achieve low glass transition temperature, simple composition, high The effect of added value

Pending Publication Date: 2022-08-02
广州市净水有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing ceramic handicrafts by using dried sludge, which solves the problems of high cost, poor performance of the prepared ceramic products and complicated preparation process in the resource utilization method of dried sludge provided by the prior art

Method used

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  • Method for preparing ceramic handicraft by utilizing dried sludge
  • Method for preparing ceramic handicraft by utilizing dried sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The present embodiment provides a method for preparing a ceramic flowerpot by using dried sludge, comprising the following steps:

[0041] The dried sludge of the municipal sewage plant with a moisture content of 38% was heat-treated at 400°C for 60 minutes, then pulverized to 100 mesh, and then the dried sludge was mixed with clay (particle size of 100 mesh) in a mass ratio of 70:30, and water was added. The mud sticks with a moisture content of 25% are obtained; the mud sticks are drilled for 5 minutes with a mud mixer, and the air bubbles in the mud are discharged; then the mud blocks after mud training are put into the mold, and the mud blocks are pressed at 4 MPa for 1 min by a hydraulic device , and air-dried at room temperature for 12 hours after pressing to obtain a clay embryo; the clay embryo was glazed and fired at 950° C. for 60 minutes, and taken out when the temperature dropped to room temperature to obtain a ceramic flower pot.

[0042] The actual picture...

Embodiment 2

[0044] The present embodiment provides a method for preparing a ceramic flowerpot by using dried sludge, comprising the following steps:

[0045]The dried sludge of the municipal sewage plant with a moisture content of 39% was heat-treated at 410 ° C for 45 minutes, then pulverized to 200 mesh, and then the dried sludge was mixed with clay (particle size of 200 mesh) according to the mass ratio of 65:35, and water was added. The mud sticks with a moisture content of 29% were obtained; the mud sticks were drilled for 6 minutes with a mud mixer, and the air bubbles in the mud were discharged; then the mud blocks after mud training were put into the mold, and the mud blocks were pressed at 6MPa for 2 minutes by a hydraulic device , and air-dried at room temperature for 18 hours after pressing to obtain a clay embryo; the clay embryo was glazed and fired at 900° C. for 50 minutes, and taken out when the temperature dropped to room temperature to obtain a ceramic flowerpot.

[0046...

Embodiment 3

[0048] The present embodiment provides a method for preparing a ceramic flowerpot by utilizing dried sludge, comprising the following steps:

[0049] The dried sludge of the municipal sewage plant with a moisture content of 35% was heat-treated at 370 ° C for 40 minutes, then pulverized to 150 mesh, and then the dried sludge was mixed with clay (particle size of 150 mesh) according to the mass ratio of 75:25, and water was added. The mud sticks with a moisture content of 34% are obtained; the mud sticks are drilled for 10 minutes with a mud mixer, and the air bubbles in the mud are discharged; then the mud blocks after mud training are put into the mold, and the mud blocks are pressed at 9 MPa for 1 min by a hydraulic device , and air-dried at room temperature for 24 hours after pressing to obtain a clay embryo; the clay embryo was glazed and fired at 850° C. for 50 minutes, and taken out when the temperature dropped to room temperature to obtain a ceramic flower pot.

[0050]...

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Abstract

The invention belongs to the technical field of sludge treatment, and discloses a method for preparing ceramic artware from dried sludge. The method comprises the following steps: sequentially carrying out heat treatment and crushing on dried sludge, and then mixing with clay and water to obtain sludge strips; sequentially performing pugging, pressing and air drying on the mud strips to obtain a mud blank; and glazing the mud blank, and firing to obtain the ceramic handicraft. According to the invention, the dried sludge is subjected to heat treatment, so that organic matters are removed, and the proportion of the sludge in the formula is increased; moreover, the raw material components are simple, additional additives are not needed, and the cost of the raw materials is reduced. According to the invention, through firing after glazing, the release of heavy metals is avoided, and the obtained ceramic artware reaches the relevant standards of the ceramic industry and has a relatively high additional value; and the firing temperature is lower than the conventional ceramic glass transition temperature, and the production process is more energy-saving.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for preparing ceramic handicrafts by using dried sludge. Background technique [0002] With the increase in the number of sewage treatment plants, the amount of sewage treatment has increased year by year, followed by the production of a large amount of excess sludge. With the acceleration of urbanization, the amount of sludge generated will be increasing. Its high moisture content, large volume, poor mechanical properties and other problems bring difficulties to stacking and transportation, and the sludge contains a large amount of toxic substances. If it cannot be properly disposed of, it will bring serious environmental problems. [0003] At present, the mature sludge treatment methods are: sanitary landfill, land use, drying and incineration, etc., but these methods have their own shortcomings, so it is of great significance to study a new sludge treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/34
CPCC04B33/1321C04B33/34C04B2235/96Y02P40/60
Inventor 李碧清孙伟唐霞李炜李子逵张立国杨海燕吴学伟黄俊熙李鹏飞
Owner 广州市净水有限公司
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