Alkali activated solidification and stabilization treatment method of refuse incineration fly ash

Abstract

The invention relates to an alkali activated solidification and stabilization treatment method of refuse incineration fly ash. The method comprises the following steps of: A: carrying out a pretreatment on the refuse incineration fly ash; B, then adding water and heavy metal stabilizing agents and fully stirring so as to fully integrate soluble heavy metals in the fly ash with the heavy metal stabilizing agents and then realizing a mineralization stability; C, adding alkali activating agents into fly ash slurry after finishing the B step and fully stirring; D, carrying out a heating treatment on a water bath after finishing the C sep, controlling a heating temperature and a heating time, and aperiodically stirring so as to uniformly heat the fly ash slurry materials; and E, finally shaping and maintaining the mixed materials so as to further blockade mineralized heavy metals in the fly ash and simultaneously solidify dioxin in the fly ash, and finally realizing the harmless solidification and stabilization of the fly ash. According to the method provided by the invention, the gelling reaction of the fly ash is generated by using the alkali activating agents to activate the fly ash activity only on a base of regulating the fly ash activity, and the double-effect stabilization of the fly ash is obtained by simultaneously supplementing the heavy metal stabilizing agents; moreover, the method has the advantages of low cost, good effect, low increase-volume rate and no secondary pollution.

Description

technical field

[0001] The present invention relates to the destruction of solid waste or the conversion of solid waste into useful or harmless things, especially to the solidification stabilization and harmless treatment of potentially active hazardous solid waste, especially to the use of alkali activators to activate fly ash activity , A treatment method that causes the fly ash to undergo a gelation reaction to achieve solidification and stability. Background technique

[0002] Waste incineration fly ash refers to the residue collected in the waste incineration flue gas purification system. It not only enriches a large amount of toxic heavy metals such as mercury, cadmium, lead, and zinc, but also enriches a large amount of dioxins. , is a kind of waste with both heavy metal hazard characteristics and environmental persistent organic toxic substance hazard characteristics, which is extremely harmful to human health and the ecological environment. It must be stabilized be...