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http://dx.doi.org/10.7844/kirr.2018.27.2.55

The Characteristic Study on Bottom Ash Flotation of Vegetable Oil as a Collector  

Kim, Min Sik (Department of Energy and Mineral Resources Engineering, Dong-A University)
Cha, Jong Mun (Department of Energy and Mineral Resources Engineering, Dong-A University)
Kang, Heon Chan (Department of Energy and Mineral Resources Engineering, Dong-A University)
Publication Information
Resources Recycling / v.27, no.2, 2018 , pp. 55-62 More about this Journal
Abstract
This study aims to investigate the characteristics on bottom ash flotation using vegetable oils as a collector. The experiment of changing the kerosene dosage as a collector for the flotation of coal ashes, the recovery of unburned carbon and unburned carbon content were 80% and 63%, respectively, when the dosage of kerosene was 9 kg/ton. The experiment of using soybean oil as a collector to improve flotation efficiency, the recovery of unburned carbon and unburned carbon content increased to 95% and 68%, respectively, when the dosage of soybean oil was 9 kg/ton. The recovery of unburned carbon and unburned carbon content were 99% and 78%, respectively, when safflower oil containing more poly unsaturated fats with double bonds than soybean oil was 9 kg/ton. The calorific value of the unburned carbon was 5,803 cal/g, confirming that it was possible to be used as a fuel for thermal power plants. Lastly, using vegetable oil as a collector it showed higher recovery of unburned carbon and higher unburned carbon than kerosene, which was mineral oil. Moreover, oil containing a large amount of poly unsaturated fat with two or more double bonds was found to have higher unburned carbon than other vegetable oils; thus showing excellent adsorbability for unburned carbon.
Keywords
Bottom ash; Flotation; Vegetable oil; Safflower oil;
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Times Cited By KSCI : 1  (Citation Analysis)
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