Porous material prepared by utilizing solid waste

A technology for solid waste and porous materials, applied in the field of porous materials and their preparation, can solve the problems of high cost, affect performance effect, discount on water storage effect, etc., and achieve the effects of low cost, good sound absorption effect and small smoke volume

Inactive Publication Date: 2018-09-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these technologies use chemical foaming to make holes, most of the pores are closed-cell structures, which greatly affects the performance effect, and except for the gold tailings slag, which is recycled waste, most of the other raw materials are expensive. Higher chemical products have higher cost and are not suitable for large-scale use; some articles have also mentioned the straw pore-making technology. The maximum amount of straw added in the existing straw pore-making technology is only 20%. The spaces are separated by solid-phase substances, which cannot guarantee mutual penetration, so that the water storage effect is greatly reduced, but it is difficult to ensure the strength after increasing the amount of straw added.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A porous material prepared from solid waste, the preparation method comprising the steps of:

[0028] 1) Weigh each raw material according to the ratio, and the mass percentage of each raw material is: 30% of tailings, 30% of heavy metal contaminated soil, 30% of straw, 9% of waste glass powder, and 1% of borax;

[0029] 2) Place the weighed tailings and heavy metal-contaminated soil in a ball mill for 2 hours and then sieve (200 mesh), then add waste straw, waste glass powder and borax, and add water accounting for 35% of the total weight of the raw materials to mix and stir. Make small balls of about 10-20 mm by a ball forming machine, put them into an oven for drying (80° C., drying time 2 hours), and finally sinter (850° C. holding time 10 minutes); the porous material is obtained.

[0030] After testing, the compressive strength of the porous material obtained in this example is 17.18MPa, the porosity is 63.14%, and the thermal conductivity is about 0.1087W·m -1 ·...

Embodiment 2

[0032] A porous material prepared from solid waste, the preparation method comprising the steps of:

[0033] 1) Weigh each raw material according to the ratio, and the mass percentage of each raw material is: 30% of tailings, 30% of heavy metal contaminated soil, 30% of straw, 9% of waste glass powder, and 1% of borax;

[0034] 2) Place the weighed tailings and heavy metal-contaminated soil in a ball mill for 2 hours and then sieve (200 mesh), then add waste straw, waste glass powder and borax, and then add water accounting for 35% of the total weight of the raw materials to mix and stir, Make small balls of about 10 mm to 20 mm by a ball forming machine, put them into an oven for drying (80° C., drying time 2 hours), and finally sinter (900° C. holding time 20 minutes); the porous material is obtained.

[0035] After testing, the compressive strength of the porous material obtained in this example is 18.35MPa, the porosity is 58.77%, and the thermal conductivity is about 0.07...

Embodiment 3

[0037] A porous material prepared from solid waste, the preparation method comprising the steps of:

[0038] 1) Weigh each raw material according to the ratio, and the mass percentage of each raw material is: 30% of tailings, 30% of heavy metal contaminated soil, 30% of straw, 9% of waste glass powder, and 1% of borax;

[0039] 2) Place the weighed tailings and heavy metal-contaminated soil in a ball mill for 2 hours and then sieve (200 mesh), then add waste straw, waste glass powder and borax, and then add water accounting for 35% of the total weight of the raw materials to mix and stir, Make small balls of about 10 mm to 20 mm by a ball forming machine, put them into an oven for drying (80° C., drying time 2 hours), and finally sinter (950° C. holding time for 30 minutes); the porous material is obtained.

[0040] After testing, the compressive strength of the porous material obtained in this example is 20.03MPa, the porosity is 52.16%, and the thermal conductivity is about ...

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PUM

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Abstract

The invention discloses a method for utilizing solid waste such as gangue and polluted soil to prepare a porous material. The porous material is prepared from the raw materials, in content by weight:20-35% of gangue, 20-35% of polluted soil, 25-50% of straw, 4-10% of waste glass powder and 1-3% of borax, after the raw materials are formed, dried, and sintered, the porous material is obtained. Theporous material has the high waste utilization rate, the high heavy metal curing efficiency and the large product porosity, and can be widely applied to fields of energy-saving materials, sound absorption materials and water retaining materials.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a porous material prepared by using heavy metal polluted soil, tailings and other solid wastes and a preparation method thereof. Background technique [0002] Due to its special porous structure, porous materials have many excellent physical and chemical properties such as high specific surface area, high porosity, high permeability, high adsorption, and assembleability, so they are widely used. In addition, a large amount of solid waste produced by mineral resources development, soil chemical pollution, etc., and straw waste produced by agricultural activities have brought serious environmental and social problems. [0003] At present, the research on the preparation of porous materials by using solid waste such as tailings and heavy metal-contaminated soil has been reported at home and abroad. For example, the patent "Method for Preparing Porous Water-collecting S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/13C04B38/06
CPCC04B33/13C04B33/132C04B38/0675C04B2235/3409C04B2235/36C04B2235/5418C04B2235/5427C04B2235/5436C04B2235/656C04B2235/6567C04B2235/96C04B2235/9607Y02P40/60
Inventor 蹇守卫李宝栋余后梁吴任迪郅真真马保国李相国谭洪波黄健苏英
Owner WUHAN UNIV OF TECH
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