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A resource utilization method of waste incineration fly ash and industrial solid waste

A technology for waste incineration fly ash and industrial solid waste, applied in the direction of cement production, etc., can solve the problems of pollution degree of industrial solid waste recycling, improper treatment of waste incineration fly ash, insufficient utilization, etc., so as to avoid secondary pollution and realize resource utilization. The effect of chemical utilization and promotion of utilization

Active Publication Date: 2020-04-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems in the above-mentioned prior art, such as improper disposal of waste incineration fly ash, pollution caused by insufficient utilization, and insufficient recycling of industrial solid waste, the present invention aims to provide a resource recovery method for waste incineration fly ash and industrial solid waste

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  • A resource utilization method of waste incineration fly ash and industrial solid waste

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Effect test

Embodiment 1

[0068] A method for resource utilization of waste incineration fly ash and industrial solid waste, said method comprising the steps of:

[0069] (1) Extraction of chlorine salts: first mix the waste incineration fly ash with water at a mass ratio of 1:5, then wash with magnetic stirring for 90 minutes, wash with water for 3 times, and filter with 400-mesh nylon filter cloth after washing. Filtrate, add polyaluminum iron silicate to the filtrate at a ratio of 1.5g / L, let it stand for 2 hours for flocculation and precipitation, and obtain supernatant and sediment; take the supernatant and enter the decalcification centrifuge for decalcification, after decalcification The crystal slurry is passed into the MVR evaporator to concentrate to obtain the crystal slurry, which gradually increases the particle size of the crystalline salt through the thickener and then is discharged into the desalination centrifuge for brine separation to obtain chlorine salt; the precipitate after floccu...

Embodiment 2

[0075] A method for resource utilization of waste incineration fly ash and industrial solid waste, said method comprising the steps of:

[0076] (1) Extraction of chlorine salts: first mix the waste incineration fly ash with water at a mass ratio of 1:5, then wash with magnetic stirring for 90 minutes, wash with water for 3 times, and filter with 400-mesh nylon filter cloth after washing. Filtrate, add polyaluminum iron silicate to the filtrate at a ratio of 1.5g / L, let it stand for 2 hours for flocculation and precipitation, and obtain supernatant and sediment; take the supernatant and enter the decalcification centrifuge for decalcification, after decalcification The crystal slurry is passed into the MVR evaporator to concentrate to obtain the crystal slurry, which gradually increases the particle size of the crystalline salt through the thickener and then is discharged into the desalination centrifuge for brine separation to obtain chlorine salt; the precipitate after floccu...

Embodiment 3

[0082] A method for resource utilization of waste incineration fly ash and industrial solid waste, said method comprising the steps of:

[0083] (1) Extraction of chlorine salts: first mix the waste incineration fly ash with water at a mass ratio of 1:5, then wash with magnetic stirring for 90 minutes, wash with water for 3 times, and filter with 400-mesh nylon filter cloth after washing. Filtrate, add polyaluminum iron silicate to the filtrate at a ratio of 1.5g / L, let it stand for 2 hours for flocculation and precipitation, and obtain supernatant and sediment; take the supernatant and enter the decalcification centrifuge for decalcification, after decalcification The crystal slurry is passed into the MVR evaporator to concentrate to obtain the crystal slurry, which gradually increases the particle size of the crystalline salt through the thickener and then is discharged into the desalination centrifuge for brine separation to obtain chlorine salt; the precipitate after floccu...

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Abstract

The invention relates to a method for performing resource utilization on garbage incineration fly ash and industrial solid waste. The method comprises the following steps: 1) performing pretreatment on the garbage incineration fly ash: mixing the garbage incineration fly ash and water, repeatedly washing the garbage incineration fly ash for three times, performing magnetic stirring while washing,filtering after washing, obtaining wet fly ash after filtering, drying at 100 DEG C for 2 hours and grinding the dried product for future use; 2) preparing raw material balls from raw materials such as fly ash, desulfurized gypsum and aluminum ash which are pretreated in the step 1), calcining, and cooling at room temperature to obtain clinker; and 3) crushing, grinding and sieving the calcined clinker in the step 2), and adding the gypsum to obtain a sulfur aluminate cementing material. By the method, the garbage incineration fly ash can be treated completely and the problem of secondary pollution caused by treatment on the garbage incineration fly ash is effectively avoided.

Description

technical field [0001] The invention belongs to the field of preparation of sulfoaluminate gelling materials, and in particular relates to a resource utilization method of waste incineration fly ash and industrial solid waste. Background technique [0002] The use of incineration to dispose of municipal solid waste is currently a relatively effective method of waste disposal at home and abroad. In the past five years, the average annual waste incineration in my country has reached 60 million tons. However, with the establishment and long-term operation of waste incineration power plants, the problem of secondary pollution continues to emerge. Toxic organic substances such as dioxins, heavy metals, and soluble salts produced during the incineration process can be enriched in fly ash, so Incineration fly ash is considered a hazardous waste and must be stabilized. However, the disposal capacity of hazardous waste in most cities in China is seriously insufficient, and there are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B11/26C04B7/32C04B7/26
CPCC04B7/26C04B7/32C04B11/264Y02P40/10
Inventor 毛岩鹏吴含王文龙宋占龙赵希强孙静薛超
Owner SHANDONG UNIV
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