Method for melting and solidifying heavy metal in waste burning fly ash

A technology of waste burning, melting and solidification, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve problems such as non-reporting, and achieve the effect of good control of heavy metal leaching effect and obvious effect of heavy metal solidification.

Inactive Publication Date: 2017-10-17
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no reports on the application of this kind of metallurgical solid waste to the treatment of heavy metal pollution in garbage fly ash.

Method used

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  • Method for melting and solidifying heavy metal in waste burning fly ash

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 10g of blast furnace gas mud and 90g of waste combustion fly ash for grinding to achieve thorough mixing, then put it into a tube furnace, raise the temperature to 800°C, and keep it warm for 0.5 hours. Finally, for the solidified product, As, Cd, Cr, Cu , Ni, Pd and Zn heavy metal leaching detection.

Embodiment 2

[0020] Take 20g of blast furnace gas mud and 80g of waste combustion fly ash and grind them to achieve thorough mixing, then put them into a tube furnace, raise the temperature to 900°C, and keep it warm for 1 hour. , Ni, Pd and Zn heavy metal leaching detection.

Embodiment 3

[0022] Take 30g of blast furnace gas mud and 70g of waste combustion fly ash for grinding to achieve full mixing, then put it into a tube furnace, raise the temperature to 1000°C, keep it warm for 1.5 hours, and finally carry out As, Cd, Cr, Cu for the solidified product according to national standards , Ni, Pd and Zn heavy metal leaching detection.

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Abstract

The invention discloses a method for melting and solidifying heavy metal in waste burning fly ash and belongs to the technical field of solid waste utilization and pollution control. According to the method, the waste fly ash and blast furnace gas mud are mixed with the proportion being 9-1:1 and heated to 800-1200 DEG C, heat preservation is conducted for 0. 5-3 hours, and finally a molten solidified product is obtained. According to the national standard, the molten solidified product is subjected to leaching test of the heavy metal of As, Cd, Cr, Cu, Ni, Pd and Zn, and the result shows that the solidified product completely meets the national emission standard. Compared with a traditional method, the blast furnace gas mud is utilized to melt and solidify the heavy metal in the waste burning fly ash at the high temperature, leaching of the heavy metal in the fly ash and environmental pollution can be effectively reduced, thus the limit that an existing heavy metal solidifying technology solely relies on first resources and chemical reagents is overcome, and a new way is also provided for harmlessness and resource utilization of the blast furnace gas mud while heavy metal pollution of the waste burning fly ash is reduced.

Description

technical field [0001] The invention belongs to the technical field of solid waste utilization and pollution control, and in particular relates to a method for reducing heavy metal pollution by taking blast furnace gas ash and garbage combustion fly ash as research objects and melting at high temperature after mixing. Background technique [0002] Waste incineration fly ash contains a certain amount of harmful substances, especially heavy metals, which are easy to fly and disperse. Volatile elements such as Cl, Pb, Cd, Zn, Sb, Se compounds and monomer enrichments, if not Disposal of direct discharge will pollute soil and groundwater, causing harm to the environment. At present, the stabilization treatment methods of incineration fly ash mainly include: normal temperature solidification treatment technology, including cement solidification method, asphalt solidification method and lime solidification method; chemical combination disposal technology, including chemical stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00B09B3/40
Inventor 高志芳龙红明吴照金春铁军吴雪兰
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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