Abstract: With the development and application of polymer flooding technology,the recovery rate of crude oil is greatly improved.Meanwhile,a large number of polymer containing wastewater is produced,resulting in environmental pollution. The utilization of industrial wastewater in the preparation of coal water slurry( CWS) is one of the effective ways to treat industrial wastewater.However,there are few studies on the use of polymer containing wastewater in the preparation of CWS.In order to study the effect of polymer containing wastewater on the preparation and performance of CWS,coal water slurry( CWS) was prepared by using Shenmu bituminous coal as raw material and naphthalene sulfonate formaldehyde condensate as dispersant and anionic polyacrylamide( HPAM) containing wastewater from oil production When the amount of dispersant and the CWS concentration were experimentally determined,the influence of the dosage of polymer containing wastewater on the rheology and stability of CWS was investigated.The results show that the performance of coal water slurry( CWS) prepared from polymer containing wastewater is good.The apparent viscosity of CWS decreases first and then increases with the increase of the amount of dispersant,and increases with the increase of CWS concentration.The CWS has good performance with the maximum pulping concentration of 56.6% and the apparent viscosity of 1 183 m Pa·s when the concentration of dispersant is 0.8%.The rheological properties of CWS is affected by the addition of polymer containing wastewater.With the increase of the proportion of polymer containing wastewater,the rheological properties of CWS first decreases and then becomes better.When the mixing ratio of wastewater is less than20%,the CWS has low apparent viscosity,good fluidity and more obvious pseudoplastic fluid.The addition of polymer containing wastewater also has great influence on the stability of CWS.The stability of CWS firstly increases and then decreases as the proportion of polymer containing wastewater increases.The stability of CWS can be improved by mixing waste water with a lower proportion( < 40%),for that the addition of polymer containing wastewater improves the slurry structure and makes the CWS hard to form hard precipitation.