The oil sand water agent was optimized, and the Inner Mongolia Tumuji oil sand was taken as the experimental object. The effects of reagent concentration, reagents sand ratio, mixing time, mixing temperature to the tailings residual oil rate were investigated. According to Tumuji oil sands, the results show that under the conditions of reagent concentration of 3.50%, agent sand ratio of 0.4∶1.0, mixing time of 25 min, mixing temperature of 90 ℃, the tailings residual oil rate can reach 0.71%. The improvement reduces the water agent consumption and the residual oil rate of the tailings.

The subject of experiment is oilsandsoil with high mechanical impurity. The study on the enhanced removal of mechanical impurities in oilsandsoil was carried out by ultrasonicsedimentation method. The effect factors including ultrasonic separation time, proportion of coking diesel oil, sedimentation time and sedimentation temperature were studied, respectively. The suitable conditions of demulsification and deimpurity in Indonesia's oilsandsoil were investigated by orthogonal experiment. The experimental results show that compared with the traditional sedimentation method, the removal rate of mechanical impurities in oilsandsoil is increased by more than 10% by ultrasonicsedimentation method. With the increase of the proportion of coking diesel oil, sedimentation time and sedimentation temperature, the proportion of mechanical impurities in oil sands decreased and the removal rate of mechanical impurities gradually increased. The proportion of coking diesel oil was the most important factor on the mechanical impurity proportion of refined oil. The optimum conditions for the removal of mechanical impurities by ultrasonicsedimentation method are as follows: the sedimentation temperature of 80 ℃, sedimentation time of 4.4 h, ultrasonic cleaning time 10.4 min and the mass proportion of coker diesel oil of 30.9%. Under the optimal conditions, the minimum mechanical impurity in the oilsandsoil was 0.26%.