Abstract
ABSTRACTDry magnetic separation of different sizes of Yiluo fine coal was carried out to purify deleterious elements. It was found that dry magnetic separation can effectively reduce a variety of harmful trace elements in raw coal. Regardless of coal particle size, the rejection efficiency of Cd, Hg, As, and Mn is 39.07%–57.16%, 33.89%–49.94%, 30.49%–47.52%, and 27.10%–52.28%, respectively. Relatively high removal efficiency of Pb, Cu, and Se is obtained, which is 26.23%–35.32%, 27.25%–39.41%, and 25.05%–32.84%, respectively. Moreover, the results show that sulfur rejection of 33.87% and reductions in ash of 41.19% are obtained with particle size of 80–120 mesh, while the combustible recovery reaches 83.68%.
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