Method using city sludge to produce ceramic floor tiles

A technology for urban sludge and floor tiles, applied in the field of producing ceramic floor tiles, can solve problems such as high equipment operating costs, inability to recycle, air pollution, etc., achieve good resource utilization, short treatment time, and solve the effects of polluting the environment

Inactive Publication Date: 2018-06-12
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, using incineration to treat municipal sludge requires large investment and high equipment operating costs. Dioxin and other highly toxic substances will also be produced during combustion, causing serious pollution to the atmosphere.
In addition, none of the above-mentioned sludge treatment methods can recycle valuable substances in the sludge, and cannot make the sludge be used as a resource.

Method used

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  • Method using city sludge to produce ceramic floor tiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1, weighing municipal sludge, adding it to a muffle dryer, and drying it at 110°C for 24 hours to obtain dry unroasted sludge;

[0028] Step 2, according to the weight ratio of the dry unroasted sludge and the standard floor tile mixture is 5%, respectively weigh the dry unroasted sludge and the standard floor tile mixture, add them into a horizontal mixer for stirring and mixing, and obtain the mixture I.

[0029] Step 3, the mixture I was left standing for 2h to obtain the mixture II.

[0030] Step 4: According to the weight ratio of water and mixture II is 5%, weigh mixture II and water respectively, put them into an automatic laboratory hydraulic press, and dry press at 30 MPa to obtain rectangular tile sample I.

[0031] In step 5, the rectangular tile sample I was added to a laboratory dryer, and dried at 110° C. for 24 hours to obtain tile sample II.

[0032] In step 6, the tile sample II was placed in a muffle furnace, and fixed at 750° C. for 30 minutes t...

Embodiment 2

[0035] Step 1, weighing municipal sludge, adding it to a muffle dryer, and drying it at 110°C for 24 hours to obtain dry unroasted sludge;

[0036] Step 2, according to the weight ratio of the dry unroasted sludge and the standard floor tile mixture is 10%, respectively weigh the dry unroasted sludge and the standard floor tile mixture, add them into a horizontal mixer for stirring and mixing, and obtain the mixture I.

[0037] Step 3, the mixture I was left standing for 2h to obtain the mixture II.

[0038] Step 4: According to the weight ratio of water and mixture II is 5%, weigh mixture II and water respectively, put them into an automatic laboratory hydraulic press, and dry press at 30 MPa to obtain rectangular tile sample I.

[0039] In step 5, the rectangular tile sample I was added to a laboratory dryer, and dried at 110° C. for 24 hours to obtain tile sample II.

[0040] In step 6, the tile sample II was placed in a muffle furnace, and fixed at 750° C. for 30 minutes ...

Embodiment 3

[0043] Step 1, weighing municipal sludge, adding it to a muffle dryer, and drying it at 110°C for 24 hours to obtain dry unroasted sludge;

[0044] Step 2, according to the weight ratio of the dry unroasted sludge and the standard floor tile mixture is 15%, respectively weigh the dry unroasted sludge and the standard floor tile mixture, add them into a horizontal mixer for stirring and mixing, and obtain the mixture I.

[0045] Step 3, the mixture I was left standing for 2h to obtain the mixture II.

[0046] Step 4: According to the weight ratio of water and mixture II is 5%, weigh mixture II and water respectively, put them into an automatic laboratory hydraulic press, and dry press at 30 MPa to obtain rectangular tile sample I.

[0047] In step 5, the rectangular tile sample I was added to a laboratory dryer, and dried at 110° C. for 24 hours to obtain tile sample II.

[0048] In step 6, the tile sample II was placed in a muffle furnace, and fixed at 750° C. for 30 minutes ...

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Abstract

The invention provides a method using city sludge to product ceramic floor tiles. The method is characterized by including the steps of firstly, weighing the city sludge, adding into a Muffle drying machine, and drying to obtain dried sludge which is not calcined; secondly weight the dried sludge and a standard floor tile mixture, and stirring and mixing in a horizontal stirring device to obtain amixture I; thirdly, allowing the mixture I to stand for a certain period of time to obtain a mixture II; fourthly, weighing the mixture II and water, and subjecting the mixture II and the water to dry pressing in an automatic laboratory hydraulic machine to obtain rectangular tile samples I; fifthly, drying the rectangular tile samples I in a laboratory drying device to obtain tile samples II; sixthly, fixing the tile samples II in a Muffle furnace to obtain tile samples III; seventhly, continuing firing the tile samples III under highest temperature to obtain ceramic floor tile samples. Themethod is simple in process flow, short in processing time, low in production cost and capable of sufficiently utilizing the city sludge resources.

Description

technical field [0001] The invention relates to a method for producing ceramic floor tiles using municipal sludge. Background technique [0002] Municipal sludge is an inevitable product of sewage treatment plants and sewage treatment. With the rapid development of my country's social economy and urbanization, the discharge of urban sludge in my country has also increased. Because urban sludge contains many harmful substances such as dangerous pathogens, toxic heavy metals, and endocrine disruptors, sludge that has not been properly treated will directly cause secondary pollution to water bodies and the atmosphere after entering the environment, which not only reduces the sewage treatment system. Effective processing capacity, and pose a serious threat to the ecological environment and human activities. Therefore, how to deal with sludge reasonably and effectively has become a very urgent issue. [0003] At present, the methods of treating municipal sludge include landfil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132
CPCC04B33/1321C04B2235/96Y02P40/60
Inventor 张守玉宋晓冰吴渊默陶欣陈陆剑
Owner UNIV OF SHANGHAI FOR SCI & TECH
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