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Wall thermal insulation material utilizing dangerous solid waste and preparation method thereof

A thermal insulation material and a dangerous technology, applied in the field of wall thermal insulation materials using hazardous solid waste and its preparation, can solve the problems of substandard detection of heavy metal leaching toxicity, poor cement curing effect, and poor mechanical properties of cement products. The effect of large-scale production and simple preparation method

Active Publication Date: 2021-03-26
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents are for the solidification of waste incineration fly ash or red mud with cement, which can not only realize the stabilization and harmless treatment of hazardous waste such as waste incineration fly ash and red mud, but also achieve the purpose of resource reuse of solid waste. However, if the amount of waste incineration fly ash or red mud is too much, the cement curing effect will be poor, and the toxicity test of heavy metal leaching will not meet the standard. If the amount of waste incineration fly ash or red mud is too small, the mechanical properties of the prepared cement products will be poor.

Method used

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  • Wall thermal insulation material utilizing dangerous solid waste and preparation method thereof
  • Wall thermal insulation material utilizing dangerous solid waste and preparation method thereof
  • Wall thermal insulation material utilizing dangerous solid waste and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1

[0034] T1. Prepare an aqueous solution of dihexenetriaminepentamethylenephosphonic acid with a molar concentration of 0.1mol / L, add waste incineration fly ash with a particle size of 30 μm at a solid-to-liquid weight ratio of 1.25:1, stir until uniform, and then Place it for 48 hours, and finally vacuum-dry it in an oven at 60°C;

[0035] T2. Add the dry solid waste obtained in step T1 into a mixer, add 0.15 wt% of the mass of γ-aminopropyltriethoxysilane and stir until uniform, and obtain the modified hazardous solid waste.

preparation example 2

[0037] The rest is the same as Preparation Example 1, except that in step T1, waste incineration fly ash is added at a solid-to-liquid weight ratio of 1.6:1.

preparation example 3

[0039] The rest is the same as Preparation Example 1, except that in step T1, waste incineration fly ash is added at a solid-to-liquid weight ratio of 2:1.

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Abstract

The invention relates to a wall thermal insulation material utilizing dangerous solid waste and a preparation method thereof. The thermal insulation material comprises the following raw materials: modified dangerous solid waste, blast furnace slag, fly ash, cement and polypropylene, wherein the modified dangerous solid waste is dangerous solid waste which is modified by an organic polybasic phosphonic acid wet method and modified by an aminoalkyl silane coupling agent dry method. According to the invention, the organic polybasic phosphonic acid and the aminoalkyl silane coupling agent are usedfor modifying the dangerous solid waste so as to stabilize heavy metals in the dangerous solid waste, and it is accidentally found that the modified dangerous solid waste is used as a raw material ofthe wall thermal insulation material, so that the dosage of cement for curing can be reduced on the premise that the leaching toxicity of the heavy metals reaches the standard through detection, andthe mechanical property and the heat insulation effect are improved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and recycling, and in particular relates to a wall insulation material utilizing hazardous solid waste and a preparation method thereof. Background technique [0002] Waste incineration fly ash is the substance collected by the flue gas dust collector after domestic waste incineration, and its main components include CaO, SiO 2 , Al 2 o 3 , Fe 2 o 3 , which is very close to auxiliary cementitious materials such as blast furnace slag and fly ash commonly used at present, is considered as hazardous waste because it contains heavy metal substances (Cu, Mn, Pb, Zn, Cr, etc.) that can be leached by water, and must be Carry out harmless treatment; red mud is an industrial waste generated in the alumina production process, the main component is SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, and also contain a small amount of heavy metal elements such as Cr, Ni, Cu, Zn, As, Cd, Cs, Pb that ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/02
CPCC04B28/04C04B20/023C04B2201/50C04B2201/32C04B18/142C04B18/08C04B24/2611C04B18/0409C04B18/10
Inventor 刘晓明李勇王亚光杜根杰李泽鹏张未
Owner UNIV OF SCI & TECH BEIJING
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