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Method for manufacturing building sheet material by utilizing solid wastes

A technology for building boards and solid waste, applied in the field of building materials, can solve the problems of insufficient consumption capacity and secondary utilization, and achieve the effects of saving resources, good heat insulation effect, and abundant resources

Inactive Publication Date: 2018-01-09
肇庆高新区恒泰信息服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, using red mud and phosphogypsum to make building materials is the most likely way to improve the utilization rate of these two solid wastes. However, most of the current technologies use these two solid wastes separately. Seriously underutilized

Method used

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  • Method for manufacturing building sheet material by utilizing solid wastes

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A method of making building boards from solid waste, the method comprising the steps of:

[0031] (1) Modification of red mud: mix red mud and phosphogypsum at a weight ratio of 2:1, add water and stir for 1 hour, filter to remove water, and dry the obtained mixture naturally, bake at 800°C for 2 hours, and cool to obtain Modified red mud. After the modified red mud is crushed, ground and screened at high speed, the modified red mud powder with a mesh number of 150-200 mesh can be obtained;

[0032] (2) Add crop straw, ammonium persulfate, and calcium hydroxide to boiling water and cook for 8 hours, remove and drain, dry naturally until the water content is ≤15%, and then finely grind with a fine mill to obtain plant fiber powder;

[0033] (3) Add modified red mud powder, plant fiber powder, Portland cement, fly ash, montmorillonite, zinc borate, and calcium lignosulfonate to the reaction kettle in sequence, control the stirring temperature to 70°C, and stir for 1 hour ...

Embodiment 2

[0037] A method of making building boards from solid waste, the method comprising the steps of:

[0038] (1) Modification of red mud: mix red mud and phosphogypsum at a weight ratio of 2:1, add water and stir for 1 hour, filter to remove water, dry the obtained mixture naturally, bake at 850°C for 2 hours, and cool to obtain Modified red mud. After the modified red mud is crushed, ground and screened at high speed, the modified red mud powder with a mesh number of 150-200 mesh can be obtained;

[0039] (2) Add crop straw, ammonium persulfate, and calcium hydroxide to boiling water and boil for 10 hours, remove and drain, dry naturally until the water content is ≤15%, and then finely grind with a fine mill to obtain plant fiber powder;

[0040] (3) Add modified red mud powder, plant fiber powder, Portland cement, fly ash, montmorillonite, zinc borate, and sodium lignosulfonate to the reaction kettle in sequence, control the stirring temperature to 70°C, and stir for 1 hour Fin...

Embodiment 3

[0044] A method of making building boards from solid waste, the method comprising the steps of:

[0045] (1) Modification of red mud: mix red mud and phosphogypsum at a weight ratio of 2:1, add water and stir for 1 hour, filter to remove water, and dry the obtained mixture naturally, bake at 750°C for 2 hours, and cool to obtain Modified red mud. After the modified red mud is crushed, ground and screened at high speed, the modified red mud powder with a mesh number of 150-200 mesh can be obtained;

[0046] (2) Add crop straw, ammonium persulfate and calcium hydroxide to boiling water and cook for 5 hours, remove and drain, dry naturally until the water content is ≤15%, and then finely grind with a fine mill to obtain plant fiber powder;

[0047] (3) Add modified red mud powder, plant fiber powder, Portland cement, fly ash, montmorillonite, zinc borate, and magnesium lignosulfonate to the reaction kettle in sequence, control the stirring temperature to 70°C, and stir for 1 hour...

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Abstract

The invention provides a method for manufacturing a building sheet material by utilizing solid wastes and relates to the field of building materials. The method comprises the following steps: modifying red mud, extracting plant cellulose from crop straws, manufacturing a sheet material blank, molding, dehydrating, drying and maintaining to obtain the building sheet material. The building sheet material has high thermal stability, corrosion resistance, bending strength and static bending strength, relatively low density and high heat-insulation and heat-preservation effects, and is one buildingsheet material with excellent performance; the method takes phosphogypsum and the red mud as raw materials, so that the consumption capability of the two solid wastes is increased, and the environment is protected; the utilization of traditional resources including wood, sandstones and cement is also reduced, and the resources are saved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for making building boards from solid waste. Background technique [0002] Red mud is the solid waste discharged during the alumina production process, and about 1.0-2.0 tons of red mud is discharged for every ton of alumina produced. At present, the comprehensive utilization rate of red mud in my country is only 4%, and the accumulated stockpile has reached hundreds of millions of tons. Most alumina factories in my country use open-air dams to stockpile red mud. This disposal method not only occupies a large area of ​​land, but also the alkali in the red mud will seep into the ground, causing groundwater and soil pollution. At the same time, the fine dust formed by exposed red mud drifts with the wind, which will also pollute the atmosphere, deteriorate the ecological environment, and seriously affect the survival of humans, animals and plants. Therefore, how to deal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/04C04B20/02C04B18/04C04B18/24
CPCY02W30/91
Inventor 黄丹
Owner 肇庆高新区恒泰信息服务有限公司
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