一、前言目前,我国重介质选煤使用的磁铁矿精粉,平均年耗量达3万吨左右,随着重介质选煤工艺的发展,磁铁矿用量还将大大增加。但磁铁矿粉是钢铁的原料,过多地使用是不适宜的。因此,研究采用选煤厂的浮选尾煤和矸石粉作加重质,在一定条件下不仅可取代磁铁矿介质,而且能简化工艺,是一种既经济又能变废为宝的好 I. Preface At present, the average annual consumption of magnetite concentrate used in heavy medium coal preparation in China is about 30,000 tons. With the development of heavy medium coal preparation technology, the amount of magnetite will also increase greatly. Magnetite powder, however, is a raw material for steel, which is not suitable for excessive use. Therefore, the use of coal preparation plant flotation tailings and gangue powder as a heavier, under certain conditions can not only replace the magnetite medium, but also to simplify the process, is both economical and turning waste into treasure good