ABSTRACT

The ease or difficulty of implementing the dewatering process is determined by the state of filter cake pores. These pores are the channels vacated by the filtrate and represent the storage space for water. In this study, the effects of particle size distribution on the filter cake pore structure and the coal slurry dewatering process were studied through visual and quantitative methods. Experimental results indicated that the proportion of micropores increased with the fine particle content. The uniformity of the pore size distribution first decreased and then increased; thereafter, its skewness and kurtosis gradually decreased. In the dewatering experiment, the filter cake moisture gradually increased with the increase in the −0.074 mm particle content, and the filter cake formation time increased. Moreover, the solid content proportion of the filtrate increased, and the filtration dewatering rate of the coal slurry decreased.

摘要

实施脱水过程的难易程度取决于滤饼孔隙的状态。这些孔隙是滤液腾出的通道，代表水的储存空间。本研究通过视觉和定量的方法研究了粒度分布对滤饼孔隙结构和煤浆脱水过程的影响。实验结果表明，微孔的比例随着细颗粒含量的增加而增加。孔径分布的均匀性先下降后上升；此后，其偏度和峰度逐渐降低。在脱水实验中，随着-0.074 mm颗粒含量的增加，滤饼水分逐渐增加，滤饼形成时间增加。而且，