重介中煤破碎再选研究

针对炼焦煤资源枯竭和夹矸煤含量增加问题,为了最大限度地保护稀缺煤种资源,以屯兰选煤厂重介中煤为研究对象,通过煤质分析和破碎解离的研究,探求了破碎粒度与中煤解离度之间的关系,提出了中煤破碎TBS分选以及浮选工艺,并对屯兰选煤厂中煤破碎再选进行了分析。结果表明:将3~0.5 mm粒级的粗煤泥采用TBS分选,0.5 mm以下细煤泥采用浮选后,选煤厂每年可增加收益为1 152.05万元,验证了中煤破碎再选的可行性。

Study on recleaning technology for dense medium middlings

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.