DU Liwei;HE Hongxing;CAI Hongtao;ZHANG Guiling;

• 1:China Coal Research Institute Company of Energy Conservation
• 2:National Coal Water Mixture Engineering Technology Research Center
• 3:State Key Laboratory of Coal Mining and Clean Utilization
• 4:National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control

Abstract：

In order to improve the concentration of lignite water slurry,lignite and clean coal were used to investigate the effects of different coal blending methods on the concentration,viscosity and fluidity of lignite water slurry,and then obtained the optimal scheme.The results show that lignite features high moisture,high volatile,high reactivity,and lower calorific value and coal water slurry concentration,while the clean coal has the characteristics of low moisture,high calorific value,poor reactivity,and high coal water slurry concentration.The highest coal water slurry concentration of lignite and clean coal are 51.89% and 73.75%,respectively.When the mass ratio and thickness ratio of lignite and clean coal are 6 ∶ 4 and 7 ∶ 3,and the dosage of additive is 0.3%,the highest coal water slurry concentration is up to 61.24%with apparent viscosity of 1 298 m Pa·s,the fluidity of B and the slurry flow spread area of 192 cm~2. Further,the fluidity and stability of prepared coal water slurry show good state,which meets the design requirements.

Key Words： gasification coal water slurry;lignite;clean coal;coal blending;gap-graded

Abstract:

Keywords:

Foundation: 煤炭科学技术研究院有限公司技术创新资助项目(2016JC03)

Authors: DU Liwei;HE Hongxing;CAI Hongtao;ZHANG Guiling;

DOI: 10.13226/j.issn.1006-6772.18032001

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