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Waste incineration fly ash all-solid waste solidification stabilization material and its solidification method

A waste incineration fly ash and solidification method technology, which is applied in cement production and other directions, can solve the problems of low strength of solidified body, resource waste environment, and difficult-to-handle solid waste, etc., and achieves simple preparation method, compact and stable structure, and low processing cost Effect

Active Publication Date: 2021-10-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a waste incineration fly ash all-solid waste solidification stabilization material and its curing method to solve the problem of the low strength of the solidified body of Portland cement solidified waste incineration fly ash and the resistance to some heavy metal ions. Low solidification efficiency and the use of a large amount of cement lead to high solidification costs, as well as the problem of resource waste and environmental pollution caused by the large amount of hard-to-handle solid waste in the fields of metallurgy and chemical industry, such as desulfurization ash and calcium phosphate slag.

Method used

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  • Waste incineration fly ash all-solid waste solidification stabilization material and its solidification method

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Effect test

Embodiment 1

[0044] A waste incineration fly ash solid waste solidification stabilization material is prepared from the following raw materials in weight percentage:

[0045] Slag powder: 25%, steel slag powder: 35%, desulfurization ash: 15%, calcium phosphate slag: 25%.

[0046] A solidification method for all solid waste solidification stabilization material solidification waste incineration fly ash, specifically comprises the following steps:

[0047] (1) Dry the slag, steel slag, desulfurization ash and calcium phosphate slag to a moisture content of 0.01% to 0.1%, and then grind the slag, steel slag, desulfurization ash and calcium phosphate slag to a specific surface area of ​​510, 445, 670, 650m 2 / g, 4 kinds of raw materials are mixed homogeneously in mixer, obtain all solid waste curing stabilization material;

[0048] (2) Mix solid waste solidification and stabilization materials with waste incineration fly ash A at a dry weight of 1:4, and add water to the above mixture at a w...

Embodiment 2

[0052] A waste incineration fly ash all-solid waste solidification stabilization material is prepared from the following raw materials in weight percentage: slag micropowder: 35%, steel slag micropowder: 30%, desulfurization ash: 10%, calcium phosphate slag: 25%.

[0053] A solidification method for all solid waste solidification stabilization material solidification waste incineration fly ash, specifically comprises the following steps:

[0054] (1) Dry the slag, steel slag, desulfurization ash and calcium phosphate slag to a moisture content of 0.01% to 0.1%, and then grind the slag, steel slag, desulfurization ash and calcium phosphate slag to a specific surface area of ​​582, 515, 720, 824m 2 / g, 4 kinds of raw materials are mixed homogeneously in mixer, obtain all solid waste curing stabilization material;

[0055] (2) Mix solid waste solidification and stabilization materials with waste incineration fly ash B at a dry weight of 1:3.5, and add water to the above mixture ...

Embodiment 3

[0059] A waste incineration fly ash all-solid waste solidification stabilization material is prepared from the following raw materials in weight percentage: slag micropowder: 18%, steel slag micropowder: 37%, desulfurization ash: 12%, calcium phosphate slag: 33%.

[0060] A solidification method for all solid waste solidification stabilization material solidification waste incineration fly ash, specifically comprises the following steps:

[0061] (1) Dry the slag, steel slag, desulfurization ash and calcium phosphate slag to a moisture content of 0.01% to 0.1%, and then grind the slag, steel slag, desulfurization ash and calcium phosphate slag to a specific surface area of ​​476, 595, 525, 642m 2 / g, 4 kinds of raw materials are mixed homogeneously in mixer, obtain all solid waste curing stabilization material;

[0062] (2) Mix solid waste solidification and stabilization materials with waste incineration fly ash C at a dry weight of 1:3, and add water to the above mixture at...

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Abstract

The invention provides a waste incineration fly ash all-solid waste solidification and stabilization material and a solidification method thereof, which belong to the technical field of industrial waste recycling and hazardous waste treatment and environmental protection. According to the mass percentage, the material includes 15%-40% of slag, 20%-45% of steel slag, 5%-15% of desulfurization ash, 15%-40% of calcium phosphate slag, and the raw materials are all from industrial waste slag, desulfurization ash and calcium phosphate The slag belongs to the refractory waste slag, and the comprehensive utilization rate is low. The solidification and stabilization material can solidify and stabilize the heavy metals in the fly ash by the hydration product of the gelling system and the phosphate in the calcium phosphate slag. Waste treatment has realized the harmless treatment of waste incineration fly ash and the resource utilization of industrial waste residue.

Description

technical field [0001] The invention relates to the technical field of industrial waste recycling and hazardous waste treatment and environmental protection, in particular to a waste incineration fly ash solid waste solidification stabilization material and a solidification method thereof. Background technique [0002] With the acceleration of urbanization in my country, the urban population has increased significantly, and the amount of urban domestic waste has also increased sharply. At present, the cumulative stock of urban domestic waste has exceeded 7 billion tons, and the annual output of national waste is increasing at a rate of about 8% per year. In 2011, the annual output of municipal solid waste will reach 323 million tons. The waste incineration method has the advantages of significant capacity reduction, stable residue, and energy recovery, and has been rapidly developed and applied. However, after waste incineration, a large amount of fly ash may be collected in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/26C04B28/22
CPCC04B7/26C04B28/186C04B2201/50C04B18/141C04B18/142C04B18/062C04B18/0481C04B18/106C04B22/002Y02P40/10
Inventor 傅平丰倪文胡文韬方贵稳许伟航
Owner UNIV OF SCI & TECH BEIJING
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