Experimental study on slurry ability of lignites mixed with petroleum coke was performed

taking the anion surface active agent-methylene naphthalene sulfonate-sodium styrene sulfonate-cacodylic acid sodium salt as the dispersant.Two kinds of lignites were selected to investigate the internal relationship between surface properties of lignite petroleum coke slurry and its slurry ability.The results show that

surface tension of the slurry increased with the ratio of coal to coke

while the slurry ability decreased.Between surface tension and slurry ability

there was qualitative relationship that reducing the surface tension would raise the slurry concentration.By adding lignite

the petroleum coke water slurry transformed into pseudoplastic fluid from dilatant fluid

and this performance could be enhanced with the ratio of coal to coke.In addition

the absolute value of Zeta potential increased too

which enhanced the stability of the mixed slurry.When the ratio of coal to coke was 2∶3

the pseudoplastic slurry could be obtained

of which the slurry concentration was above 60%

and the drainage rate was lower than 5%.