Ceramicite using ash from incineration of refuse as raw material and its prodn. method

Abstract

A haydite is prepared from the fly ash (20-80 Wt%) generated by burning garbage and clay (rest) through mixing, granulating, and high-temp calcining at 1000-1400 deg.C.

Description

technical field [0001] The invention relates to a ceramsite and a preparation method thereof, in particular to a ceramsite using waste incineration fly ash as a raw material and a method thereof. Background technique [0002] The rapid growth of urban domestic waste has become an important issue restricting the sustainable development of cities. Statistics show that in 2001, the annual domestic waste in Chinese cities has reached 135 million tons, while the degree of harmless treatment is only 20%. The accumulated garbage over the years has reached 7 billion tons, occupying about 800,000 mu of land, causing potential impact and harm to the environment. Garbage incineration technology can effectively destroy organic toxic substances, greatly reduce the volume of garbage (generally can be reduced to 5% to 30% of the original volume), and the waste heat generated by incineration can also be recycled. One of the main methods of harmless and volume reduction technology. However...

AI Technical Summary

Problems solved by technology

The actual situation in China is: on the one hand, there is a shortage of land for landfills at present, and the construction investment is large, and the cost of cementing the fly ash before landfilling is too high (1500 yuan / ton to 2500 yuan / ton); on the other hand , the incineration fly ash is disposed of directly in landfill, and the harmfulness of the dissolution of heavy metals to human health and the living environment cannot be ignored.