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Method for preparing high-performance insulating brick from solid waste sludge

A high-performance technology for insulating bricks, which is applied in the field of preparing high-performance insulating bricks from solid waste sludge, can solve the problems of low sludge utilization efficiency and poor performance of insulating bricks, and achieve low prices, avoid cracking and deformation, and save energy. resource effect

Pending Publication Date: 2021-12-14
LONGYAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, more and more achievements have been made in the research on insulating bricks made of river silt, but there are still many problems such as low utilization efficiency of silt and poor performance of the prepared insulating bricks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The specific steps of using solid waste sludge to prepare high-performance insulation bricks are as follows:

[0035] (1) 10 parts of coal gangue, 15 parts of iron tailings, 7 parts of shale and 3 parts of boron-magnesium mud are mixed and then added to 200 parts of solid waste sludge, and the resulting mixture is stirred evenly to obtain mixed sludge;

[0036] (2) The mixed silt obtained in the step (1) was naturally aired indoors for 2 days, and the average temperature was controlled to be 26 degrees during airing, and the humidity was 70%. The water content in the partially dehydrated mixed silt measured after the air was 29.7%. ; Add 2 parts of quicklime and 3 parts of waste materials in the calcium silicate production process to the partially dehydrated mixed sludge, mix them evenly and put them into a hydroforming machine to make bricks under 30MPa pressure;

[0037] (3) Put the adobe prepared in step (2) into microwave drying equipment for microwave heating and d...

Embodiment 2

[0040] The specific steps of using solid waste sludge to prepare high-performance insulation bricks are as follows:

[0041] (1) After mixing 12 parts of coal gangue, 13 parts of iron tailings, 10 parts of shale and 7 parts of boron-magnesium mud, they were added to 200 parts of solid waste sludge, and the resulting mixture was stirred evenly to obtain mixed sludge;

[0042] (2) The mixed silt obtained in the step (1) was naturally aired indoors for 2 days, and the average temperature was controlled to be 26 degrees during airing, and the humidity was 70%, and the water content in the partially dehydrated mixed silt measured after the air was 29.1%. ; Add 5 parts of quicklime and 8 parts of waste materials in the calcium silicate production process to the mixed sludge after partial dehydration, put it into a hydroforming machine after mixing evenly, and make adobe under 30MPa pressure;

[0043](3) Put the adobe prepared in step (2) into microwave drying equipment for microwave...

Embodiment 3

[0046] The experimental step of using solid waste sludge to prepare high-performance thermal insulation bricks refers to Example 2. The difference is that the amount of waste in the calcium silicate production process in step (2) is adjusted to 2 parts, and the rest of the steps are the same as in Example 2. . According to the national standard GB26538-2011, the prepared insulation bricks were characterized, and the results are as follows: the heat transfer coefficient is 0.14 / W·(m 2 ·K) -1 , the compressive strength is 128kg / cm 3 , the bulk density is 1.39g / cm 3 , The porosity is 73.7%.

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Abstract

The invention discloses a method for preparing a high-performance insulating brick from solid waste sludge. The method comprises the following specific steps: (1) mixing coal gangue, iron tailings, shale and boron magnesium sludge, adding the formed mixture into solid waste sludge, and carrying out uniform stirring to obtain mixed sludge; (2) partially dehydrating the mixed sludge, adding a fluxing agent and a pore-forming agent, carrying out uniform mixing, and putting the formed mixture into a hydraulic forming machine to prepare a green brick; and (3) drying the green brick, and firing the green brick in a kiln to obtain the insulating brick. According to the preparation method provided by the invention, the pore-forming agent is added to prepare the insulating brick, so the problems of low activity and difficult forming of solid waste raw materials such as sludge are solved, the additional value of a sludge-based sintered brick is improved, and the application range of the sludge-based sintered brick is widened. The insulating brick prepared by the preparation method provided by the invention also has excellent heat-insulating property and compression resistance, and the sludge is used for making the brick, so pollution is eliminated, resources are saved, an urban environment is protected, the reutilization of the waste is effectively realized, and good economic benefits can be brought.

Description

technical field [0001] The invention belongs to the technical field of solid waste silt recycling and utilization, in particular to a method for preparing high-performance insulation bricks from solid waste silt. Background technique [0002] There are many rivers in our country, and the intricate water network has brought people abundant water resources and convenient transportation; however, affected by environmental factors and human factors, for example: with the continuous increase of urban population, it is easy to accumulate a large amount of water in the river Garbage and sludge, and the increase of river silt will not only hinder the flow of river water, but may also cause floods during the rainy season, which threatens the safety of the surrounding people; therefore, one of the major tasks of river management is to clean up river silt Work (Xu Yang, Yan Changhong, Xu Baotian, Shao Yong, Ruan Xiaohong. Preliminary study on the characteristics of urban river silt and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B35/622C04B33/132C04B33/13
CPCC04B38/02C04B35/62204C04B35/622C04B33/1321C04B33/13C04B2235/349C04B2235/3272C04B2235/602C04B2235/656C04B2235/6567C04B2235/3418C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3409C04B2235/606C04B2235/77C04B2235/96C04B2235/9607Y02P40/60
Inventor 周云龙胡志彪张夏红
Owner LONGYAN UNIV
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