Inner Mongolia Donghua Energy Corporation Ltd.
Inner Mongolia Tianrun Fertilizer Corporation Ltd.
China Coal Technology & Engineering Clean Energy Corporation Ltd.

对气化细灰高碳组分和化工污泥与煤协同制浆进行研究,有助于气化细灰和煤化工污泥的减量化及资源化利用,可为开发煤化工固废与煤协同制备高质量气化水煤浆技术提供支撑。针对气化细灰高碳组分和化工污泥在与煤协同制浆过程中存在的煤浆质量差的关键问题,采用气化细灰高碳组分和改性化工污泥与煤掺混制浆,通过分析固废不同研磨时间和掺混比例对混合煤浆黏度、流动性、粒度分布、纳米CT技术和接触角的影响,揭示煤化工固废的掺入对煤浆性能的作用机制。结果表明,改性污泥和高碳细灰与煤直接掺混制浆,掺混量每增加1个百分点,煤浆浓度降低约0.3~0.7个百分点;通过细磨或超细磨则可改善改性污泥、高碳细灰对煤浆成浆浓度的影响,在相同条件下与不进行研磨的制浆工艺相比,细磨后的煤浆浓度提升0.3~0.4个百分点。由于细灰和污泥的加入而使制浆原料与水的接触角降低,成浆性变差,煤浆浓度降低;细磨后的细灰、污泥与煤之间形成粒度级配,超细颗粒包覆在粗颗粒表面而具有润滑的作用,从而导致研磨后的固废掺入对煤浆浓度的影响降低。

Research on the synergistic production of gasification fine ash and high carbon components, as well aschemical sludge and coal, is helpful for the reduction and resource utilization of gasification fine ash and coal chemi⁃cal sludge. It can provide support for the development of high⁃quality gasification coal water slurry technology throughthe synergistic production of coal chemical solid waste and coal. In response to the key issue of poor quality of coalslurry in the co⁃production of gasification fine ash high carbon components and chemical sludge with coal, gasificationfine ash high carbon components and modified chemical sludge were mixed with coal to produce slurry. By analyzingthe effects of different grinding times and mixing ratios of solid waste on the viscosity, fluidity, particle size distribu⁃tion, nano CT technology, and contact angle of the mixed coal slurry, the mechanism of the effect of coal chemicalsolid waste addition on the performance of coal slurry was revealed. The results showed that modified sludge and highcarbon fine ash were directly mixed with coal to produce slurry. For every 1 percentage point increase in mixing a⁃mount, the concentration of coal slurry decreased by about 0. 3-0. 7 percentage points; the influence of modifiedsludge and high carbon fine ash on the concentration of coal slurry could be improved through fine grinding or ultrafinegrinding. Under the same conditions, compared with the slurry making process without grinding, the concentration ofcoal slurry after fine grinding increased by 0. 3 to 0. 4 percentage points. Due to the addition of fine ash and sludge,the contact angle between the slurry raw materials and water is reduced, resulting in a deterioration of the slurry prop⁃erties and a decrease in the concentration of coal slurry. The particle size distribution is formed between the fine ash,sludge, and coal after fine grinding, and the ultrafine particles are coated on the surface of the coarse particles,which have a lubricating effect, resulting in a decrease in the effect of solid waste addition after grinding on the con⁃centration of coal slurry.

国家重点研发计划2019固废专项资助项目(2019YFC1905105)

亢欣,杜东虎,李磊,等.气化细灰高碳组分和化工污泥与煤协同制浆研究[J].煤质技术,2024,39(3):39-44.

KANG Xin, DU Donghu, LI Lei, et al. Research on collaborative slurry production of high carbon fine ash andchemical sludge with coal [J]. Coal Quality Technology, 2024, 39 (3): 39-44.