The sludge produced during the coal-to-oil process is mixed with lean coal to prepare the coal/sludge water slurries. The effects of sludge addition on the viscosity, rheological properties and stability of the slurry are investigated. Results show that with the increase of sludge content, the viscosity of slurries decreases and the maximum slurry concentration decreases. When the sludge to coal ratio increases from 0% to 15%, the maximum slurry concentration decreases from 73.08% to 65.38%. The addition of sludge causes the coal slurry to change from expanding plastic fluid to yielding pseudoplastic fluid, and with the increase of sludge addition, the pseudo plasticity enhanced. In addition, the addition of sludge can significantly improve the stability of coal water slurry.%以煤制油污泥与瘦煤混合制备的煤浆为研究对象,考察不同污泥添加量对污泥煤浆粘度、流变性和稳定性的影响.结果表明,随污泥添加量的增加,煤浆的粘度升高,最大成浆浓度降低,当污泥添加量从0%增加到15%时,最大成浆浓度由73.08%降至65.38%;污泥的加入使煤浆由胀塑性流体变为屈服假塑性流体,并且随着污泥添加量的增加,其假塑性也随之增强;此外,添加污泥能够显著提高水煤浆的稳定性.
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