Garbage incineration fly ash curing agent

Abstract

The invention discloses a garbage incineration fly ash curing agent. The curing agent is prepared by mixing heavy magnesium powder, bentonite and quicklime. The components include, by mass percent, 60%-75% of the heavy magnesium powder, 5%-15% of the bentonite and 15%-25% of the quicklime, and the sum of the content of the above components is 100%. The garbage incineration fly ash curing agent is formed by mixed powder of the heavy magnesium powder, the bentonite and the quicklime, due to optimization of the ratio of all the components, the prepared curing agent is good in curing effect, heavy metal ions in garbage fly ash are effectively cured, the curing age is short, the curing cost is greatly reduced, in addition, the curing agent is good in stability, the problem of leaching of harmful substances does not exist after curing, and other high-concentration waste cannot be generated.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a curing agent for waste incineration fly ash. Background technique [0002] As the centralized incineration method has gradually become the main method of municipal solid waste treatment in my country, the safe disposal and utilization of incineration fly ash has also become a common concern of scholars. Due to the impact of various environmental factors during the landfill process, heavy metals in waste incineration fly ash may migrate and transform. Therefore, how to deal with incineration fly ash has attracted more and more attention with the development of society. Stabilization and fly ash solidification must be carried out before the final disposal of incineration fly ash, because incineration fly ash contains heavy metals such as lead and cadmium with high leaching concentrations. Of course, the incineration fly ash can also be transported to a special h...

AI Technical Summary

Problems solved by technology

Cement-solidified fly ash technology is a relatively mature hazardous waste treatment technology, which has obvious advantages in terms of economy and operability. However, the high amount of cement used leads to a high volumetric expansion rate of the solidified body. Over time, the solidified body Some toxic substances may dissolve gradually, posing a long-term and potential threat to the environment;

[0005] 2. Melting solidification technology: The melting solidification technology is mainly to mix fly ash and fine glass, and after mixing and granulating to form, melt at a high temperature of 1000-1400 ℃. Good, but the fatal disadvantage is that some toxic substances will be volatilized, and exhaust gas treatment measures must be taken, so the system is more complicated and the operating cost is high;

Using the above-mentioned agents to treat fly ash can generally achieve better results. This method has the advantages of simple treatment process and less equipment investment, but the disadvantage is that it will produce high-concentration inorganic salt wastewater, which needs further treatment.