Municipal solid waste incineration fly ash curing method

Abstract

The invention discloses a municipal solid waste incineration fly ash curing method. The method comprises the steps of mixing waste incineration fly ash, cesium carbonate waste residue, potassium carbonate and cement according to the ratio of (40-50): (25-38): (3-6): (15-25); then, feeding right amount of purified water into the mixture, evenly mixing, enabling a molding model to be filled with the mixture, extruding and compacting; after that, standing the model in the air for 24 hours, and then demoulding to obtain a cured green body; maintaining the cured green body to obtain a cured body which can be directly buried, wherein the maintaining time is not shorter than 14 days. According to the method, the cesium carbonate waste residue is taken as an important raw material for curing the fly ash, so that the consumption of the cement is greatly reduced, waste recycling is realized, and the waste incineration fly ash curing cost is lowered. After the method is used, the compressive strength of the cured body and the heavy metal leaching completely meet the landfill requirements.

Description

technical field [0001] The invention relates to a technology for harmless treatment of domestic waste, in particular to a method for solidifying fly ash of domestic waste incineration, and belongs to the technical field of solidification treatment of domestic waste. Background technique [0002] Because waste incineration fly ash contains dangerous components such as heavy metals and organic pollutants (such as dioxin), it has been included in the list of hazardous waste by the state, so it must be treated innocuously before safe landfill and utilization. The solidification treatment of domestic waste incineration fly ash mainly considers two aspects: one is that the solidified body must have a certain compressive strength to reduce the environmental risk of leaching of harmful elements caused by the destruction of the solidified body; the other is the leaching of harmful elements in the solidified body The concentration meets the entry standard of the "Standards for Pollu...

AI Technical Summary

Problems solved by technology

The stabilization of chemical agents is the process of transforming toxic and harmful substances into soluble, low-migration and low-toxicity substances through chemical reactions. The heavy metals in the water will be leached due to leaching, resulting in secondary pollution, and the cost is high

Cement solidification has become a pretreatment method for the final disposal of incineration fly ash that is widely used in the world because of its easy-to-obtain materials and good treatment effects. However, cement production consumes too much energy and resources.

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