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Method for preparing river mud sintered brick

A technology of river silt and sintered bricks, which is applied in the field of building materials, can solve the problems of complex process and long period, complex and diverse ingredients, low yield of fired bricks, etc., achieve high controllability and operability, improve production efficiency, and save water resource effect

Inactive Publication Date: 2017-07-11
JIANGSU ZHONGYI ECOLOGICAL SOIL INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a preparation method of river silt sintered bricks, which solves the technical problems in the prior art of river silt sintered bricks that the ingredients are complex and diverse, the process is complicated and the cycle is long, the yield of fired bricks is low, the quality is low, and the cost input is high.

Method used

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  • Method for preparing river mud sintered brick

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Experimental program
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Effect test

preparation example Construction

[0020] A preparation method of river silt sintered bricks, comprising:

[0021] Adding a modifier to the screened and removed river silt, and dehydrating to make the first silt material;

[0022] Stirring the first sludge material, and pressing to obtain brick adobe;

[0023] Drying the adobe at room temperature and drying room in sequence to obtain the adobe to be fired;

[0024] After the adobe to be fired is pre-fired in the range of 400-600°C, the temperature is raised continuously and the second-stage firing is carried out in the range of 850-1000°C.

[0025] Specifically:

[0026] Sludge preparation, river and lake sludge is sieved to remove impurities; pumped river and lake silt to the grid to sieve and remove impurities, then add modifier, and then filter through plate and frame filter press to form the first sludge material for standby, usually silt cake;

[0027] Preferably, the sand content of the first sludge material is ≤35%.

[0028] The particle size of the...

Embodiment 1

[0038] Add the modifier into the sludge, and mechanically dehydrate it through a plate and frame filter press to a moisture content of 21%; then stir with a strong mixer, press the stirred sludge into bricks, dry naturally and dry in a drying room, and then bake in an electric furnace. First pre-fire at 400°C for 60 minutes, then raise the temperature to 850°C with the furnace and keep it for 240 minutes; cool to room temperature with the furnace to obtain the product. The performance test results are shown in Table 1.

Embodiment 2

[0040] Add the modifier into the sludge, and mechanically dehydrate it through a plate and frame filter press to a moisture content of 26%; then stir it with a strong mixer, press the stirred sludge into bricks, dry naturally and dry in a drying room, and then bake in an electric furnace. First pre-fire at 450°C for 55 minutes, then raise the temperature to 900°C with the furnace and keep it for 180 minutes; cool to room temperature with the furnace to obtain the product. The performance test results are shown in Table 1.

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Abstract

The invention belongs to the technical field of building materials, and discloses a method for preparing a river mud sintered brick, and the method is as follows: adding a modifier into screened and purified river mud, and dewatering the river mud to obtain a first mud material; stirring the first mud material, pressing and molding to obtain a brick blank; drying the brick blank in turn at room temperature and in a drying chamber to obtain a to-be-burnt brick blank; pre sintering the to-be-burnt brick blank at 400 to 600 DEG C, and heating to 850 to 1000 DEG C for secondary-section firing. The invention provides the method for preparing an energy saving and consumption reducing river mud sintered brick.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a preparation method of river mud sintered bricks. Background technique [0002] Silt contains a large amount of clay, a small amount of sand, aquatic animals and plants, and heavy metals. After dredging, a large amount of silt is accumulated on the surface or even on the cultivated land, resulting in the waste of the cultivated land, and at the same time, the heavy metals deposited in the silt pollute the environment. The utilization of building materials is an effective way to solve the problem of river and lake silt, especially the preparation of sintered silt bricks with river and lake silt as the main raw material. The preparation process is relatively simple, the requirements for raw material composition are low, and the production cost is low, which has attracted widespread attention. . [0003] The existing process route of sintered silt bricks: natural dryin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/30C04B33/32
CPCC04B33/1321C04B33/30C04B33/32C04B2235/661C04B2235/77C04B2235/96Y02P40/60
Inventor 薛强张少华陈亿军姜利国
Owner JIANGSU ZHONGYI ECOLOGICAL SOIL INST
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