煤炭转化2026，Vol.49Issue(1)：43-51,9.DOI:10.19726/j.cnki.ebcc.202601004
分级条件及颗粒粒级对新疆煤气化渣水流分级提炭的影响
Effect of classification conditions and particle size on carbon-ash separation of Xinjiang coal gasification slag by water-flow classifier
摘要
Abstract
Based on the problems of large consumption of reagents and low separation effi-ciency of carbon-ash in traditional flotation,a new type of water-flow classifier is developed to extract and separate the carbon from coal gasification coarse slag(CGCS)by the synergistic effect of rising water-flow and impeller speed without reagent addition.The effects of impeller speed and water velocity on the water-flow classifier and carbon-ash separation performance of Xinjiang coal-water slurry gasification coarse slag were investigated,and the optimal conditions were obtained.The sepa-rated product characteristics of CGCS with different particle sizes obtained by wet screening were fur-ther discussed.The results show that with the increase of impeller speed and water velocity,the yield of floated slag increases,the yield of sunk slag decreases,the loss on ignition(LOI)of floated slag and comprehensive efficiency increases first and then decreases,while the loss on ignition of sunk slag decreases continuously to 7.35%.In the optimized conditions,the carbon-rich product with a loss on ignition of 84.95%is obtained,at which the combustibles recovery rate is 38.04%,and the compre-hensive efficiency is 36.84%.The carbon-ash separation can be further realized by water-flow classi-fier of CGCS with different particle sizes,and the loss on ignition of the obtained floated slag decreases with the decrease of particle size.However,the structural analysis shows that the density,specific surface area,and pore volume of the floating slag and sunk slag particles are significantly dif-ferent.The products with the enrichment of carbon can be obtained by wet screening of CGCS,and after further water-flow classified,the combustible recovery rate and efficiency are higher than that of the CGCS directly subjected to water-flow classification.The LOI of the floated slag from screening followed by water-flow classification decreases with the decrease of particle size,and the structural analysis shows that the density,specific surface area,and pore volume of floated slag and sunk slag are significantly different.This study shows that the water-flow classifier can realize efficient carbon-ash separation of CGCS.关键词
煤气化粗渣/粒级/水流分级/烧失量/提炭分质Key words
coal gasification coarse slag/particle size/water-flow classifier/loss on igni-tion/carbon-ash separation分类
化学化工引用本文复制引用
高晨明,张乾,魏洋,吕剑明,张宝霖,彭泽宇,黄伟..分级条件及颗粒粒级对新疆煤气化渣水流分级提炭的影响[J].煤炭转化,2026,49(1):43-51,9.基金项目
中国神华煤制油化工有限公司科技创新项目(MZYHG202103)和山西省基础研究计划面上项目(202303021211073) （MZYHG202103）
