Progress and developing trend of the research work on new coal slurry water treatment methods

The use of agents for treating coal slurry water is liable to cause environmental pollution, and is disadvantageous to realization of green cleaning and utilization of coal. Moreover, with the increase of the difficulty in clarification of the slurry water, the slurry water treatment technologies currently applied can not yield the required result. In order to address this issue, 3 new slurry water treatment methods are proposed, and analysis is made of the working principle of and the effect obtained with the use of each method. Practice shows that the use of the 3 methods are all effective, agents saving and low in cost. Nevertheless, there is still a large room for further improvement and the methods need to be incessantly optimized. For industrial application, an appropriate method needs to be selected according to operating conditions of the coal cleaning plant and the property of raw coal.