Study on recleaning technology for dense medium middlings
Li Xuanhuai
Abstract：In view of the coking coal resources depletion and the increase of the content of thick coal seam,the dense medium middlings of Tunlan coal preparation plant was used as the research object to save the scarce coal resources.The study of coal quality analysis and crushing dissociation was employed to explore the relationship between crushing grain size and middlings dissociation.The TBS separation of middlings crushing and flotation technology was proposed,and its economic benefit was analyzed.Results indicate that coal preparation plant could increase the income of 11.520 5 million yuan a year if utilize coarse coal slime with 3-0.5 mm by TBS separation process and the fine slime by flotation under 0.5 mm.It proves the feasibility of recleaning for dense medium middlings.
Keywords：dense medium separationmiddlingscrushingdissociationTBSflotation
Publication Date：2017-01-01