由于机械化采煤不断增加,人选原煤中的细粒含量越来越多,在洗选各环节中又产生大量再生煤泥,致使选煤厂煤泥水浓度不断提高。如何解决煤泥水澄清问题,成为选煤生产中的一个重大研究课题,而随着四化建设的不断深入,环境保护也越来越被重视,因而实现煤泥水闭路循环势在必行。为此,作为澄清煤泥水的一种有效药剂-高分子聚丙烯酰胺在选煤生产中得到了广泛运用。聚丙烯酰胺的生产在我国发展很快。目前全国每年生产约6000吨,包括胶体、粉末 Due to the continuous increase of mechanized coal mining, more and more fines are contained in raw coal candidates, and a large amount of regenerated slimes are produced in all stages of the washing process, resulting in a continuous increase in the concentration of slime water in the coal preparation plant. How to solve the problem of clarification of slime water has become a major research topic in the process of coal preparation. With the deepening of the four modernizations, environmental protection has also been paid more and more attention. Therefore, it is imperative to achieve closed circulation of slime water. To this end, as an effective agent to clarify the slime water - polymer polyacrylamide in the coal preparation has been widely used. Polyacrylamide production in China is developing rapidly. The current annual production of about 6,000 tons, including colloidal, powder