STUDY ON PROPERTIES OF COAL-SLUDGE SLURRY PREPARED BY LEAN COAL AND SLUDGE FROM COAL-TO-OIL PROCESS

摘要

In this study, different from coal-to-oil process was mixed withrnlean coal to prepare CSS with KY33 as dispersant. With thernincrease of the amount of sludge, the viscosity of sludgerngradually larger and maximum solid loading decreased fromrn73.08% to 65.38%. The addition of sludge changed the slurryrnrheological model from the dilatant fluid to the yieldrnpseudoplastic fluid. With the increase of sludge dosage, thernpseudoplasticity became stronger. The addition of sludge canrnform a stable spatial structure in CSS, and prevent settling ofrnparticles. Thus, it increased the stability of the slurry.