Method for preparing splitting tiles by using Tai lake silt

A silt and drying technology, applied in the field of making split bricks by using Taihu silt, can solve the problems of poor mechanical properties, secondary pollution, soil damage, etc., and achieve excellent flexural strength, good erosion resistance, and avoid secondary pollution. Effect

Active Publication Date: 2014-03-19
JIANGSU LONG LEAPING ENG DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, Taihu Lake silt contains a large number of microorganisms, pathogens, heavy metals and organic pollutants. If it is not properly treated, it will cause secondary serious pollution, especially in the midsummer season. As the temperature rises, a large number of blue-green algae will be produced in Taihu Lake water. However, from the analysis of the production process of blue-green algae, it is found that it is not only related to water quality and temperature, but also closely related to the large amount of silt in Taihu Lake. At present, water conservancy and environmental protection departments at all levels deal with the silt in Taihu Lake every year. Landfill and incineration are the main means of treatment. Since the sludge contains a large amount of organic matter and heavy metals, if landfill is used, it will bring great harm to the soil. Landfilling sites can often cause secondary pollution
If incineration is used, the investment and operation costs are high, especially the energy consumption is large, and there is also the problem of waste gas treatment during incineration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Ingredients are made according to the following weight percentages: 1. Taihu Lake silt 35% (moisture content 35%), feldspar 33% (average particle size 30mm), kaolin 23%, quartz 4%, mica 2%, water 6%, Interface agent 2%.

[0019] 2. Dry and pulverize the Taihu Lake silt into fine granules first, when the water content reaches 35%, then mix it with the above materials evenly and then through vacuum extrusion, use an extruder to preform under the pressure of 20MPa, and the molding time is 2 Second.

[0020] 3. After the extruded bricks are placed under natural conditions for 3 hours, they are dried in a drying room at a temperature of 110°C for 5 hours, and then fired in a kiln for 9 hours at a temperature of 1120°C. The kiln yields the finished split brick. The average shrinkage rate is 4.1~4.5%, the average flexural strength is 26.7~28.9MPa, the average compressive strength is 18.7MPa, the frost resistance is -30~+30c, the color difference is less than 0.2, the seis...

Embodiment 2

[0022] 1. Ingredients are made according to the following weight percentages: 1. Taihu Lake silt 30% (moisture content 28%), feldspar 35% (average particle size 25mm), kaolin 17%, quartz 5%, mica 3%, water 7%, Interface agent 3%.

[0023] 2. Dry and crush Taihu Lake silt into fine particles first, so that the moisture content reaches 28%, then mix with the above materials evenly and then through vacuum extrusion, use an extruder to preform under the pressure of 13MPa, and the molding time is 3 Second.

[0024] 3. After the extruded bricks are placed under natural conditions for 2 hours, they are dried in a drying room at a temperature of 113°C for 4 hours, and then fired in a kiln for 8 hours at a temperature of 1140°C. The kiln yields the finished split brick. The average shrinkage rate is 3.9~4.5%, the average flexural strength is 23.4~24.5MPa, the average compressive strength is 19.8.MPa, the frost resistance is -29~+29c, the color difference is less than 0.15, the seismi...

Embodiment 3

[0026] 1. Ingredients are made according to the following weight percentages: 1. Taihu Lake silt 25% (moisture content 30%), feldspar 40% (average particle size 23mm), kaolin 20%, quartz 4%, mica 5%, water 5%, Binder 1%.

[0027] 2. Dry and pulverize Taihu Lake silt into fine granules first, when the moisture content reaches 30%, then mix with the above materials evenly and then through vacuum extrusion, use extruder to preform under 16MPa pressure condition, and the molding time is 4 Second.

[0028] 3. After the extruded bricks are placed under natural conditions for 1 hour, they are dried in a drying room at a temperature of 115°C for 4.5 hours, and then fired in a kiln for 7 hours at a temperature of 1160°C. The kiln yields the finished split brick. The average shrinkage rate is 4.3~4.5%, the average flexural strength is 23.3~25.5MPa, the average compressive strength is 18.MPa, the frost resistance is -31~+31c, the color difference is less than 0.16, the seismic intensit...

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Abstract

The present invention discloses a method for preparing splitting tiles by using Taihu silt. The method comprises: adding feldspar, kaolin, quartz, mica, a dry mixing agent and water to dried particles of a Taihu silt raw material, mixing and uniformly stirring, and then sequentially carrying out extruding forming, drying, and calcination to prepare the splitting tiles. According to the present invention, the difficulty of Taihu silt treatment can be solved from the source; with high temperature calcination, the problem of heavy metals, pathogens and organic pollutants in the Taihu silt is thoroughly solved so as to achieve regeneration resource utilization of the silt, and avoid secondary pollution generation; and the produced splitting tiles have characteristics of excellent flexural strength, anti-erosion property and the like, and do not produce secondary pollution after high temperature calcination, such that a large amount of land occupation required by landfill can be saved, and requirements of environmental protection and comprehensive utilization of resources in our country are met.

Description

technical field [0001] The invention belongs to the fields of environmental protection and resource utilization, and in particular relates to a method for preparing split bricks from Taihu Lake silt. Background technique [0002] At present, Taihu Lake silt contains a large number of microorganisms, pathogens, heavy metals and organic pollutants. If it is not properly treated, it will cause secondary serious pollution, especially in the midsummer season. As the temperature rises, a large number of blue-green algae will be produced in Taihu Lake water. However, from the analysis of the production process of blue-green algae, it is found that it is not only related to water quality and temperature, but also closely related to the large amount of silt in Taihu Lake. At present, water conservancy and environmental protection departments at all levels deal with the silt in Taihu Lake every year. Landfill and incineration are the main means of treatment. Since the sludge contains ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/22C04B33/132
CPCY02P40/60
Inventor 潘龙屈俊峰沈勇林曹跃峰滕素兰李勇李健马振杰王宙王永君赵富贵王程程
Owner JIANGSU LONG LEAPING ENG DESIGN
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