Method for preparing molten glass body by utilizing complementarity of two fly ash components

Abstract

The invention discloses a method for preparing a molten glass body by utilizing complementarity of two fly ash components. The method comprises the following steps: uniformly mixing grate furnace fly ash and fluidized bed fly ash, and putting the mixture into a crucible; putting the crucible into a muffle furnace, setting the temperature, carrying out programmed heating to a certain temperature, and then carrying out heat preservation for a certain time; closing a gas inlet valve and opening a gas outlet valve in a heat preservation process, and keeping a reducing atmosphere in the furnace; and after the heat preservation is finished, immediately taking out the crucible from the muffle furnace, breaking the crucible after the crucible is naturally cooled, and taking out the glass body. The two kinds of hazardous waste are used for preparing the glass body, the operation steps are simpler, the economic cost is low, the melting temperature is reduced (energy consumption is reduced), the prepared glass body is high in stability and safety (for example, the heavy metal fixing effect is good, and the leaching toxicity is low) and good in application prospect, co-treatment of the two kinds of fly ash (hazardous waste) is achieved, and the application prospect is wide. And in addition, metal recovery can be achieved.

Description

technical field [0001] The invention relates to the technical field of environmental protection and resource comprehensive utilization, in particular to a method for preparing a molten glass body by utilizing the complementarity of two fly ash components. Background technique [0002] The proportion of incineration disposal of urban domestic waste in my country is constantly increasing, and has reached 54% (over 50%) at present, and the amount of incineration fly ash is also gradually increasing, because fly ash has high chlorine and high alkali characteristics. , high water-soluble salt content, enrichment of heavy metals and dioxin-like substances, etc., its treatment and disposal will also face huge challenges. [0003] Fly ash treatment technologies include solidification / stabilization landfill, high temperature sintering, cement kiln co-processing, plasma melting, high temperature melting and other technologies. For landfills, cement or stabilizers are usually used to s...

AI Technical Summary

Problems solved by technology

Although this technology has remarkable treatment effects and obvious advantages, the problem of high energy consumption has always been an important factor restricting its widespread use

[0006] (1) The reaction temperature is too high and the energy consumption is large

[0007] (2) Poor stability of the vitreous body and environmental risks

[0008] (3) The value of resource-based products is low

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