Method for stabilizing treatment of refuse burning fly ash by using accelerated carbonation process |
Title： |
| Method for stabilizing treatment of refuse burning fly ash by using accelerated carbonation process |
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Application Number： |
200610144280 |
Application Date： |
2006/12/01 |
Announcement Date： |
2007/05/16 |
Pub. Date： |
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Publication Number： |
1963304 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
F23J 15/00, B09B 3/00 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Jiang Jianguo, Chen Maozhe, Xu Xin, Zhang Yan |
Key Words： |
accelerated carbonation process, stabilizing treatment, fly ash |
Abstract： |
The carbonization speeding up technique for stabilizing the heavy metals in the burnt fly ash belongs to the field of hazardous solid wastes treatment. Filling 10-50% of water into the fly ash of the burnt residue and making it into the fly ash with certain ratio of water, putting it into a shakable or a turnover container, then let the burnt fly ash have carbonization reaction with CO2 intermittently or continuously input. Small portion of heavy metal and large portion of limestone in the burnt fly ash carbonize with CO2 and turn into carbonate material that can last stably in the natural world. The carbonization process promotes the stabilization of the burnt fly ash, with water against limestone equaling to 20%, reducing Pb intensity to 0.081mg/1. Besides, the burnt fly ash absorbs CO2 well, with dried burnt fly ash can absorb CO2 3% of its own weight. The invention is low in cost and feasible for mechanical operation. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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