Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of porous material prepared from solid waste

A technology of porous materials and waste straw, applied in the field of building materials, can solve the problems of affecting performance, high cost, and water storage effect discount, and achieve the effects of good sound absorption, small smoke volume, and less closed cells

Inactive Publication Date: 2021-07-20
WUHAN UNIV OF TECH
View PDF7 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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 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 0.0744W·m...

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 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 0.049...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a porous material by using solid waste such as tailings and polluted soil. The raw materials for preparing the porous material include the following material components in weight content: 20-35% of tailings and 20-35% of polluted soil , 25-50% of straw, 4-10% of waste glass powder, and 1-3% of borax are molded and dried, and then sintered to obtain a porous material. The invention has high waste utilization rate, heavy metal solidification efficiency and large product porosity, and can be widely used in the fields of energy-saving materials, sound-absorbing materials, water storage materials and the like.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com