Fly ash baked brick prepared by washed incineration fly ash of house refuse and preparation method thereof

Abstract

The invention discloses a fly ash baked brick prepared by washed incineration fly ash of house refuse and a preparation method thereof. The fly ash baked brick consists of 25-35% of washed incineration fly ash of house refuse, 45-70% of clay and 5-20% of feldspar in percentage by weigh. The preparation method comprises seven steps of washing treatment of incineration fly ash of house refuse, pretreatment before crushing materials, material crushing, aging of raw materials, forming of raw materials, green body drying and sintering to form brick. Finally, the fly ash baked brick prepared by washed incineration fly ash of house refuse is obtained. In the invention, the washed incineration fly ash of house refuse is used to prepare the baked brick; by calcining, dioxin in the incineration flyash can be destroyed thoroughly and heavy metals in the fly ash can be cured, thereby achieving the purpose of innocent treatment of incineration fly ash of house refuse and turning the waste into valuable. The manufacturing process of the fly ash baked brick is simple and the fly ash baked brick has good macroscopic properties and can be used for paving roads.

Description

technical field [0001] The invention relates to a method for preparing fly ash sintered bricks made of domestic waste incineration fly ash washed with water. Background technique [0002] With the rapid development of waste incineration technology, the amount of fly ash produced is increasing. Fly ash is a recognized hazard because it contains dioxins (polychlorinated dibenzodioxins, polychlorinated dibenzofurans) and a large amount of heavy metals. Waste, its dioxins and heavy metals are difficult to deal with. However, fly ash contains more silicates and aluminosilicates, which is a useful material and can be used as a resource. The development of sintered bricks with fly ash not only realizes the resource utilization of waste, but also can destroy the dioxins in the fly ash during the calcination process, and the dense structure of the finished product can solidify the heavy metals in the fly ash, so as to achieve the harmlessness of the fly ash It has certain theoreti...

AI Technical Summary

Problems solved by technology

At the same time, since the disposal of fly ash landfills cannot destroy dioxins, and the heavy metals in them cannot be degraded, once leakage occurs, it will cause great harm to society, so there are certain hidden dangers; fly ash landfills cannot be reused after they are closed. use, resulting in a large waste of resources

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