长期以来,我国炼焦煤选煤厂的产品结构基本上是精煤、中煤、煤泥和洗矸石。从六十年代开始,曾提出“煤泥厂内回收,洗水闭路循环”,有些选煤厂从煤泥中分出部分高灰分的尾煤。七十年代又提出“沸腾煤”问题。现在,尽管沸腾煤还没有正式列入国家商品煤目录,也没有 For a long time, the product structure of China's coal preparation plant is essentially clean coal, coal, slime and washing waste. Since the 1960s, it has proposed “recycling and water washing in the slime plant.” Some coal preparation plants separate part of the high-ash tailings from slime. The seventies again raised the issue of “boiling coal”. Now, although boiling coal has not been formally included in the national commodity coal list, there is no