选煤厂要达到最大产率,要得到较高的经济效益,这就给选煤工作者提出了进行改革选煤工艺流程和改变洗煤产品结构的问题。本文就改革选煤工艺流程,对原煤分级入洗问题,进行初步探讨。分级与不分级的问题,一直存在着分歧。英、美等国曾经推广原煤不分级洗 Coal preparation plant to achieve the maximum yield, to get higher economic benefits, which gives coal preparation workers to carry out the reform process of coal preparation and coal washing product structure change. This article on the reform of coal preparation process, the classification of raw coal into the washing problem, a preliminary discussion. There have always been differences between grading and grading. Britain, the United States and other countries have promoted the classification of raw coal washing