Method for physical and chemical separation of waste incineration fly ash and preparation of cementing material

Abstract

The invention discloses a method for physical and chemical separation of waste incineration fly ash and preparation of a cementing material. The invention discloses the method for physical and chemical separation of the waste incineration fly ash and preparation of the cementing material, wherein the method is characterized by comprising the following steps: dispersing fly ash in an organic solvent, and carrying out physical separation and filtration to obtain a calcium material, a chlorine material and a carbon material; adding a stabilizer, a curing agent, a pore reducing agent and a plasticizer into the calcium material, and uniformly mixing to obtain the cementing material; adding water and a trapping agent into the chlorine material, and filtering to obtain metal slag and a chlorine salt solution; and feeding the carbon material into a garbage incinerator for combustion. The method has the characteristics of low production cost and high efficiency.

Description

technical field [0001] The invention relates to the field of resource utilization of domestic waste incineration fly ash, in particular to the separation and high-quality application of components in the incineration fly ash. The method can be used in other waste resource utilization fields. Background technique [0002] With the rapid increase in the amount of urban domestic waste, simple direct landfill can no longer meet the needs of urban development. In recent years, waste incineration technology has become more mature. The waste incineration fly ash (hereinafter referred to as fly ash) produced during the waste incineration process is listed as HW18 hazardous waste by the state because it contains heavy metals such as Zn, Cd, Pb, Hg, and organic pollutants such as dioxin. According to data from the National Bureau of Statistics, as of 2018, there are about 400 waste incineration power plants that have been built and operated nationwide, and the annual output of fly ash...

AI Technical Summary

Problems solved by technology

[0003]Aiming at problems such as ineffective recycling of waste incineration fly ash and environmental pollution, avoid direct washing of fly ash with large water consumption, poor on-site working conditions, and energy loss during salt concentration. Due to the disadvantage of high consumption, this patent provides a method for physical and chemical separation and high-quality application of various components in incineration fly ash, so as to promote its resource utilization

Images