Beneficiation of an Indian non-coking coal by column flotation
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- 作者：N. Vasumathi ; T. V. Vijaya Kumar…
- 刊名：International Journal of Coal Science & Technology
- 出版年：2016
- 出版时间：June 2016
- 年：2016
- 卷：3
- 期：2
- 页码：206-214
- 全文大小：854 KB
- 刊物类别：Fossil Fuels (incl. Carbon Capture); Geotechnical Engineering & Applied Earth Sciences; Mineralogy;
- 刊物主题：Fossil Fuels (incl. Carbon Capture); Geotechnical Engineering & Applied Earth Sciences; Mineralogy;
- 出版者：China Coal Society
- ISSN：2198-7823
- 卷排序：3
文摘
Beneficiation of non-coking coal is gaining ground in India. It not only reduces the volume of inert content to be transported to the power plant and also lowers the wear in the boiler houses. For special applications such as the fuel for integrated gasification combined cycle plant (IGCC), the ash content in the coal should preferably be below 15 %. Indian coals are characterized by high inter-grown ash content mainly due to ‘drift origin’ of Gondwana formation in Permian age. This warrants fine grinding of non-coking coal in order to liberate the ash forming minerals from coal macerals. A non-coking coal sample of vitrinite type from India was ground to 44 µm (d80) and subjected to column flotation to improve its quality. The non-coking coal analyzing 34.6 % ash, 26.2 % volatile matter, 1.3 % moisture and 37.9 % fixed carbon could be upgraded to a concentrate/froth of 14.83 % ash at 72.18 % yield by optimizing collector and frother dosages and flotation column operating parameters, namely, froth depth, superficial feed velocity and superficial air velocity. The concentrate produced by this process is suitable as fuel for IGCC in coal-to-electricity route.KeywordsNon-coking coalWashabilityBeneficiationColumn flotationCoal gasification