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http://dx.doi.org/10.7844/kirr.2019.28.4.15

Recycling of Coal Ash and Related Environmental Issues in Australia  

Park, Jin Hee (School of Crop Science and Agricultural Chemistry, Chungbuk National University)
Ji, Sang-Woo (Mineral Resources Division, Korea Institute of Geoscience and Mineral Resources)
Shin, Hee-Young (Mineral Resources Division, Korea Institute of Geoscience and Mineral Resources)
Jo, Hwanju (Mineral Resources Division, Korea Institute of Geoscience and Mineral Resources)
Ahn, Ji-Whan (Mineral Resources Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Resources Recycling / v.28, no.4, 2019 , pp. 15-22 More about this Journal
Abstract
Coal combustion products are generated during coal combustion and can be grouped into fly ash and bottom ash depending on collection methods. Fly ash and bottom ash can be recycled for various purposes based on their characteristics. Australia is the fourth largest coal production country in the world and reuses coal ash as cement, concrete, mine filler, and agricultural soil amendment. When fly ash is used as a supplement for cement and concrete, strength of the cement and the durability of the concrete can be improved. Use of coal combustion product for mine backfill stabilizes underground mine voids and stores a large amount of coal ash in the voids. Because of alkalinity of coal combustion products, it can neutralize acid mine drainage when used for mine backfill. In addition, it can be used as an agricultural soil amendment to improve acidity and physical properties of the soil and to supply plant nutrients. Recycling of fly ash in Australia will be further expanded because of its low trace element contents that can be toxic to plants and low radioactive element contents existing within soil background concentrations. The characteristics of coal combustion products are related to the characteristics of the coal used for combustion, and since Korea imports coal from Australia, Korean coal combustion products also can be recycled for various purposes.
Keywords
coal combustion product; fly ash; bottom ash; recycling; trace element;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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