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Method for preparing building aggregate from household garbage incineration slag

A domestic waste incineration and slag technology, which is applied in the direction of sustainable waste treatment, solid waste management, and climate sustainability, can solve problems such as high safety risks, structural defects, and durability defects, so as to improve particle strength and reduce waste. Small pores, good practical effect

Active Publication Date: 2021-11-09
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a method for preparing building aggregates from domestic waste incineration slag, aiming to solve the problems of durability and structural defects and safety risks in the prior art when domestic waste incineration slag is reused as building aggregates to a certain extent high technical issues

Method used

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  • Method for preparing building aggregate from household garbage incineration slag
  • Method for preparing building aggregate from household garbage incineration slag
  • Method for preparing building aggregate from household garbage incineration slag

Examples

Experimental program
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Embodiment 1

[0055] The present embodiment provides a method for preparing a novel high-quality aggregate, comprising the following steps:

[0056] S01. Use a vibrating screen to pass the domestic waste incinerator slag through a 20mm sieve as it is, use a jaw crusher to crush the domestic waste incinerator slag larger than 20mm as it is (after removing metal impurities), and take out the crushed aggregates and mix them to a life size smaller than 20mm. From the waste incineration slag as it is, domestic waste incineration slag having a size of less than 20 mm described in this specification was obtained.

[0057] S02. Place the domestic waste incineration slag smaller than 20mm in a crucible, place the crucible in the muffle furnace, and heat up from room temperature to 680-750°C at a rate of 10-30°C / min, and keep the temperature for 1-2h after , The domestic waste incineration slag is immediately taken out from the furnace, and the concrete waste water of the mixing station is extremely ...

Embodiment 2

[0062] As another embodiment of the present invention, different from the first embodiment, in step S05 of this embodiment, the curing temperature is (40±1)° C., the relative humidity is (40±5)%, and the CO2 concentration is (70 ±5)%, the curing time is 5d.

Embodiment 3

[0064] As another embodiment of the present invention, different from the first embodiment, in step S05 of this embodiment, the curing temperature is (60±1)° C., the relative humidity is (60±5)%, and the CO2 concentration is (50 ±5)%, the curing time is 2d.

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Abstract

The invention belongs to the technical field of solid waste resource utilization and wastewater treatment, and discloses a method for preparing building aggregate from household garbage incineration slag, which comprises the following steps: performing high-temperature heating and low-temperature tempering treatment on the household garbage incineration slag to obtain a first solid material; dispersing the first solid material into concrete wastewater of a mixing plant for water bath, conducting oscillating in a reciprocating manner, and then conducting draining and drying to obtain a second solid material; and subjecting the second solid material to carbonization curing in the atmosphere of set temperature, set humidity and set CO2 concentration, so as to obtain the building aggregate. According to the method for preparing the building aggregate from the household garbage incineration slag, the household garbage incineration slag, mixing plant concrete wastewater and greenhouse gas CO2 can be efficiently recycled and reused, the novel high-quality building aggregate is prepared through modification treatment by utilizing the specific physical and chemical properties of waste, and the risk of generating durability defects and structural defects is reduced.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization and wastewater treatment, in particular to a method for preparing building aggregates with domestic waste incineration slag. Background technique [0002] Domestic waste incineration slag is the product of domestic waste incineration, accounting for 20 to 30% of the total weight of waste. The annual output of waste incineration slag is huge, and its resource reuse is an important way of harmless treatment, but the actual reuse situation is not. ideal. The content of heavy metals in the domestic waste incineration slag is low, the leaching toxicity of heavy metals is far lower than the national standard, and the heavy metal elements are relatively stable under natural conditions. , in the utilization of resources, the disturbance to the environment is small, and it will not cause great harm to the environment. Therefore, the domestic waste incineration slag is used as a ge...

Claims

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Application Information

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IPC IPC(8): C04B20/04C04B20/02C04B18/10
CPCC04B20/04C04B20/023C04B20/02C04B18/10Y02W30/91
Inventor 陈珍李江山薛强向罗京陈新凌海波
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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