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Method for producing architectural materials by using paper making sludge

A technology for papermaking sludge and building materials, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the environmental pollution of papermaking sludge and other problems, and achieve the effect of low cost, good performance and beautiful appearance

Inactive Publication Date: 2011-07-20
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above technical deficiencies, the present invention provides a method of using papermaking sludge to produce building materials, which solves the environmental pollution problem of papermaking sludge, alleviates global warming, and prepares building materials with good performance and beautiful appearance

Method used

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  • Method for producing architectural materials by using paper making sludge
  • Method for producing architectural materials by using paper making sludge
  • Method for producing architectural materials by using paper making sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The papermaking sludge from a paper mill in Zibo is selected as the main raw material, and its chemical composition and weight percentage are:

[0031]

[0032] Industrial quicklime is selected as the auxiliary raw material, and its main component is CaO.

[0033] Take 60kg of papermaking sludge, 40kg of quicklime, 100kg of raw materials, crush them, add water, mix them evenly, and press them into 76×38×8mm 3 of semi-finished panels. Industrial waste gas carbon dioxide is used for accelerated carbonization treatment, the concentration of carbon dioxide is 35% by weight, and the accelerated carbonization temperature is 30-80°C. After 2 hours of reaction, the finished plate is made.

[0034] After accelerated carbonization, the weight increase is to absorb about 8% of carbon dioxide, and the carbonization rate exceeds 16%. The flexural strength of the carbonized papermaking sludge sheet is about 3MPa, and the compressive strength is about 12MPa.

[0035] The XRD ana...

Embodiment 2

[0038] Select papermaking sludge (same as Example 1) and steel slag from Jinan Iron and Steel Group as main raw materials. The chemical composition and weight percentage of steel slag are:

[0039]

[0040] Take 25kg of papermaking sludge, 75kg of steel slag, and crush 100kg of raw materials, add water, mix evenly, and press into 76×38×12mm 3 of semi-finished bricks. Industrial waste gas carbon dioxide is used for accelerated carbonization treatment, the concentration of carbon dioxide is 35% by weight, the pressure of carbon dioxide gas is 2.5bar, and the accelerated carbonization temperature is 30-60°C. After 6 hours of reaction, the finished brick is made.

[0041] After accelerated carbonization, the weight increases by absorbing about 10% of carbon dioxide, and the carbonization rate exceeds 20%. The flexural strength of carbonized paper sludge brick is about 4MPa, and the compressive strength is about 17MPa.

Embodiment 3

[0043] Select papermaking sludge (same as Example 1), steel slag (same as Example 2), lime and waste cement concrete as raw materials. The chemical composition and weight percentage of waste concrete are:

[0044]

[0045] Take 35kg of paper-making sludge, 20kg of steel slag, 20kg of lime and 25kg of waste concrete, crush 100kg of raw materials, add industrial lime water, mix evenly, and press into 76×38×12mm 3of semi-finished bricks. Industrial waste gas carbon dioxide is used for accelerated carbonization treatment, the concentration of carbon dioxide is 25% by weight, the pressure of carbon dioxide gas is 4bar, and the accelerated carbonization temperature is 30-60°C. After 14 hours of reaction, the finished brick is made.

[0046] After accelerated carbonization, the weight increases by absorbing about 5% of carbon dioxide, and the carbonization rate exceeds 10%. The flexural strength of carbonized papermaking sludge bricks is about 2.5MPa, and the compressive strengt...

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Abstract

The present invention belongs to the technical field of environmental protection, and relates to a method for preparing a building material by using industrial wastes (paper making sludge, different steel slag, furnace cinders, waste concrete) as main raw materials and applying an accelerated carbonation technology, in particular to the method for producing the building material by using the paper making sludge. The method comprises the following steps: according to the weight ratio of between 1 to 0.5 and 1 to 4, mixing the paper making sludge with a carbonized material; adding water into the mixture and mixing the mixture evenly; pressing the mixture into a semi-finished product of the building material; and preparing the semi-finished product of the building material into a finished product of the building material under the curing of accelerated carbonation. The method effectively makes use of the industrial wastes such as the paper making sludge, reduces the emission of the greenhouse gas of carbon dioxide, and prepares the building material with excellent performance and beautiful appearance. The method has the advantages of favorability for waste recycling, environmental protection, energy conservation, and low cost.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for preparing building materials by using industrial waste (papermaking sludge, different steel slag, slag, and waste concrete) as main raw materials and applying accelerated carbonization technology, in particular to a method for using papermaking sludge Methods of producing building materials. Background technique [0002] With the consumption of a large amount of fossil energy, atmospheric CO 2 content is increasing year by year, from the greenhouse gas CO 2 The greenhouse effect caused by environmental pollution is also intensified, which has serious negative impacts on society and economy. my country's papermaking industry is a relatively serious pollution industry. A large amount of waste residue and sludge are produced in the production process, which constitutes a huge pollution to the surrounding environment. In papermaking waste, sludge is the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/30C04B22/08
CPCC04B18/243C04B2111/00017C04B28/10Y02W30/91C04B12/04C04B18/142C04B22/064C04B22/106C04B2103/10
Inventor 常钧叶正茂黄世峰吴昊泽丁亮潘正昭
Owner UNIV OF JINAN
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