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Tech, for sintering pottery floor tile by urban sewage mud

A technology for urban sewage and dewatered sludge, which is applied in manufacturing tools, ceramic molding machines, etc., can solve the problems of low strength of finished products, low dosage, lack of performance and influencing factors, and achieve good environmental benefits, not easy to leaching, and good economy. effect of benefit

Inactive Publication Date: 2006-06-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using sludge to make building materials can achieve good environmental benefits and good economic benefits, but there is a lack of specific systematic research on its performance and influencing factors
[0003] In previous studies, sludge is usually added to cement in the form of incineration ash after proper pre-treatment or incineration to make blocks, or added to clay to be fired into ceramsite. The dosage is generally low, and the strength of the finished product is not high. high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] 1. Raw materials:

[0025] Sludge powder: Dry the dewatered sludge from Changsha No. 2 Sewage Treatment Center, grind it, and pass through 28-mesh and 100-mesh sieves respectively to make coarse and fine sludge powder. The particle size of the coarse sludge powder is 0.63-0.150mm, fine sludge powder particle size <0.150mm;

[0026] Kaolin: chemically pure

[0027] Feldspar powder: particle size about 0.150mm

[0028] SiO 2

al 2 o 3

Fe 2 o 3

CaO

MgO

TiO 2

K 2 o

Na 2 o

Loss on ignition

15.99

6.58

5.09

2.05

0.62

0.33

0.61

0.059

67.09

[0029] 2. Process steps:

[0030] 1) Ingredients: use sludge powder: kaolin: feldspar powder = 1:4:2 mass ratio ingredients, mix evenly;

[0031] 2) Add water: add water with a dry weight of 11% of the total ingredients in the ingredients, and mix evenly;

[0032] 3) Storage: Store in a constant temperature box (LRH-2...

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PUM

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Abstract

The invention relates to a technology that could fire city sewage sludge into ceramic floor tile. The process including the following steps: mixing 13%-15% city sewage sludge powder, 55%-60% kaolin, 26-30% feldspar powder equally, adding 10-12% water, storing for 14-16 in constant temperature of 18-22 degree centigrade, pressing and molding under 90MPa, heating to 400 degree centigrade at the speed of 50 degree centigrade per ten minutes, when reaching 100 degree centigrade, keeping for 1 hour, heating to 700 degree centigrade by the speed of 50 degree centigrade per ten minutes from 400 degree centigrade, and heating to 1200 degree centigrade by the speed of 70 degree centigrade per ten minutes from 700 degree centigrade, keeping for 2 hours; naturally cooling to room temperature to gain finished product. The invention has great environment benefit and economic benefit.

Description

technical field [0001] The invention relates to the production of building materials, and further refers to the technology of firing ceramic floor tiles from urban sewage sludge. Background technique [0002] A large amount of sludge produced after sewage treatment contains a large amount of toxic and harmful substances. If it is not properly disposed of, it will cause great harm to the environment. At present, various new environmentally friendly and effective resource utilization methods for sludge disposal have been discussed at home and abroad, such as sludge composting, biogas utilization, sludge brick production, and biochemical fiberboard production. reports. The use of sludge to make building materials can achieve good environmental benefits and good economic benefits, but there is a lack of specific systematic research on its performance and influencing factors. [0003] In previous studies, sludge is usually added to cement in the form of incineration ash after p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/18B28B1/29C04B35/00C04B35/622C04B35/64
Inventor 施周李淑展
Owner HUNAN UNIV
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