Experimental study on selective separation of macerals using flocculation-flotation combined process

The study is made with the coal produced by Dagaoliang Mine as the object. The study is directed toward the enrichment of macerals by using flocculation-flotation combined process for achieving a better result in separation of maceral through flotation process. The effect on flotation performance produced by different types of collectors and flocculants and the combined use of these 2 types of reagents are extensively investigated. Result of test shows that: with the use of cationic collector, a better separation result can be expected, and a highest rate of enrichment of float vitrinite and sink inertinite can be attained with the use of amino dodecane as collector, which are up to 83. 29% and 47. 44% respectively; when flocculation-flotation process is made with aluminum polychloride as flocculant, a satisfactory separation result can be achieved, and with the combined use of amino dodecane and aluminum polychloride as flocculant, the enrichment rate of the abovementioned vitrinite and inertinite goes up to 93. 29% and 50. 79% respectively.