煤泥的选择性絮凝研究

SELECTIVE FLOCCULATION OF COAL SLURRY

介绍了用选择性絮凝对煤中可燃体和非可燃体进行分离的煤泥分选方法。在对大屯、八一、大武口等多个煤样进行大量试验后，得出选择性絮凝方法可用于制取超纯精煤和对极细粒煤泥进行分选，并且具有较好的选择性。制取超纯精煤时，灰分＜３％，可燃体回收率和产率均在９０％左右，最高分别为９５．８８％和９４％。对极细粒煤泥分选，精煤灰分一般为１２％～１３％，可燃体回收率可在９０％以上。因此，是一种较有前途的方法，可用于制取超纯精煤，并为煤泥分级浮选中，细粒部分的处理方法开辟了一条新途径。

Selective flocculation is introduced to separate combustible and noncombustible components of coal.This method can be used to produce superclean coal and to separate ultrafine coal,and the result is fairly good after a number of selective flocculation tests of Datun, Bayi and Dawukou coal samples. The ash content of the superclean coal is less than 3%. The yield and recovery of combustibles are over 90%. The best one is 95.88% and 94%, respectively. The ash content of clean coal may reach 12%～13% and the combustible recovery is over 90% for ultrafine coal separation. Thus it is promising to utilize this technique in producing superclean coal and separating ultrafine coal in the flotation system .