Method for preparing pyroceram by melting garbage incineration flying ash in arc furnace

Abstract

The invention discloses a method for preparing pyroceram by melting garbage incineration flying ash in an arc furnace. The method comprises the following steps of: mixing pre-washed garbage incineration flying ash serving as a main raw material and one of nucleation agents TiO2 and Cr2O3; conveying the mixture to the arc furnace for high temperature melting treatment; directly pouring the flow-out liquid melted slag into a preheated molding die; and transferring the molded melted slag to a thermal treatment furnace for annealing and crystallization, and subsequently polishing to prepare the pyroceram. According to the method, the melted slag formed by melting the garbage incineration flying ash can be converted into recyclable available materials, additional economic benefits are supplied, and the melting treatment cost of the incineration flying ash is reduced effectively; furthermore, emission of acidic gas during melting of the flying ash can be reduced, erosion of chlorides in the flying ash to a fire resistant material of the melting furnace is eliminated, the physical sensible heat of the melted slag in the arc furnace is used effectively, and the energy consumption in the preparation process is reduced.

Description

Technical field

[0001] The invention relates to a method for treating and reusing solid waste, in particular to a method for preparing glass-ceramics by melting fly ash from garbage incineration in an electric arc furnace. Background technique

[0002] As the landfill site of domestic waste is becoming more and more restricted, incineration has become one of the main development directions of waste treatment in my country. However, after incineration of waste will produce about 3% to 5% of fly ash, which contains considerable amounts of fly ash. A large amount of toxic substances such as heavy metals and dioxins that are easy to leach. Heavy metals and dioxins cannot be chemically decomposed or biodegraded, and they have a strong bioaccumulation effect. Once they enter the environment, they will seriously endanger human survival and health. How to safely and effectively dispose of waste incineration fly ash and realize the recycling of resources has become an urgent problem to be...