褐煤煤泥浮选降灰试验研究

为探索内蒙古白音华煤田褐煤降灰的可能性,对该煤田褐煤干燥过程中产生的褐煤粉煤进行小浮沉试验和捕收剂条件试验,在此基础上进行浮选降灰试验。试验结果表明:该煤田褐煤煤泥具有分选降灰的可能性,当浮选精煤灰分为18%时,精煤产率为70%,精煤可燃体回收率为84.31%,此时该褐煤属于易浮煤;当浮选精煤灰分<15%时,精煤可燃体回收率为65.04%,此时该褐煤属于中等可浮煤。该试验说明褐煤煤泥可通过浮选降灰提质,为褐煤脱硫降灰提供一定的数据支持。

Experimental study on ash reduction of lignite slime by flotation

To research the feasibility of ash reduction of lignite from Baiyinhua coal field,the float-and-sink and collector condition tests were done on the fine coal produced from the lignite drying process,and based that conducted the ash reduction test by flotation.The test result shows that there is feasibility for ash reduction for the lignite slime mined from that coal field.When the ash content of flotation clean coal is 18%,the clean coal yield is 70%,and the combustible material recovery rate is 84.31%,the lignite belongs to easy to float coal;when the ash content of clean coal less than 15% and the combustible material recovery rate is 65.04%,the lignite belongs to medium to float coal;the tests indicated that the ash content of lignite slime can reduced and the quality can improved by flotation,which provide certain data support for ash reduction and desulfurization of lignite.