A study of mineral recovery from waste ashes at an incineration facility using the mineral carbonation method

Mineral carbonation is a well-known method for recovering minerals. Recently, the process has been combined with carbon dioxide sequestration. However, mineral carbonation generally requires large amounts of energy and mineral resources to generate carbonates. In this study, the possibility of using...

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Bibliographic Details
Published in:International journal of mineral processing 2016-10, Vol.155, p.1-5
Main Authors: Park, Sangwon, Song, Kyungsun, Jeon, Chi Wan
Format: Article
Language:English
Subjects:
Ashes
Calcium carbonate
Carbon dioxide
Carbon dioxide sequestration
Carbonates
Carbonation
Combustion
Mineral carbonation
Minerals
Minerals recovery
Waste ashes
Wastes
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Summary:Mineral carbonation is a well-known method for recovering minerals. Recently, the process has been combined with carbon dioxide sequestration. However, mineral carbonation generally requires large amounts of energy and mineral resources to generate carbonates. In this study, the possibility of using waste ash and an intermediate solution to recover minerals is investigated, because waste ashes contain large amounts of calcium ions. Our approach is to prepare calcium carbonate by reacting calcium containing material with carbon dioxide. For this purpose, we used a solution containing 5wt% amine and 15vol% CO2 and ashes collected from an incineration facility. The experimental approach consisted of an extraction step and a carbonate formation step. The CO2 precipitate and waste ashes were analyzed by XRF, XRD, and SEM. Most of the CO2 emitted was precipitated, and the carbonate formed exhibited a cubic structure. Based on the results obtained, we conclude that valuable minerals can be recovered from waste materials. •This study aims to recover the minerals from waste ashes by using the mineral carbonation method.•Using this method, most of the generated CO2 was precipitated with metal ions in the waste materials.•This research demonstrated the possibility of recovering minerals from waste materials.
ISSN:0301-7516
1879-3525
DOI:10.1016/j.minpro.2016.08.001