Influence of grading size on slurryability of Shenfu coal
ZHU Xuedan
Abstract：In order to enable Shenfu coal to have a better slurryability,analyze its raw coal characteristics.Its slurrying index is 11.55 which indicates that the coal is difficult to form coal water mixture(CWM).Conduct the screen analysis of different dry coal samples.Taking coarse powder,fine powder and different grading size coal respectively as research object,investigate their slurryability.The results show that,after particle size gradation,the coal samples have double-peak particle size distribution which is benefical to the formation of CWM. The coarse powder can’t form CWM alone,the maximum CWM concentration is 61% when using fine powder.When the ratio of coarse and fine coal powder is 1 ∶ 2,the CWM has good liquidity and stability.The highest CWM concentration can reach 63.8%,the viscosity is 1000 mPa.s.Each indicator meets the standard of industrial CWM preparation.So appropriate grading size helps to form high quality CWM.
Keywords：coal water mixturegrading sizeslurryabilitysize distributiondouble-peak
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-3,6 )