粒度级配对神府煤成浆性能的影响

为提高神府煤制备水煤浆的成浆性能,分析了神府煤的原煤性质,说明神府煤的成浆指标为11.55,属于很难成浆煤种。对不同粒度级配的干基煤样进行粒度分析,通过粗、细煤粉单独制浆实验和不同粒度级配煤粉的成浆性实验,研究了不同粒度级配对水煤浆成浆性的影响。结果表明:经过级配的干基煤样具有双峰粒度分布特征,适宜制浆;粗煤粉不能单独成浆,细煤粉单独制浆的最大成浆浓度为61%;粗细煤粉质量比约为1∶2时,水煤浆具有较好的流动性和稳定性,最大成浆浓度可达63.8%,此时水煤浆黏度为1000 mPa·s,符合工业水煤浆制备标准,说明合理的粒度级配可降低水煤浆黏度,增强流动性及稳定性。 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 1000mPa·s. Each indicator meets the standard of industrial CWM preparation. So appropriate grading size helps to form high quality CWM