To improve the pressure retention and sand mixing effects of high‑energy mixing tanks，computational fluid dynamics methods and orthogonal experiment methods were used to analyze the influence patterns of different parameters on evaluation indicators such as inlet‑outlet pressure ratio，outlet particle volume fraction，and unit volume mixing energy of the mixing tank，determining the corresponding impacts of each parameter.The results show that the order of influence of outlet diameter，impeller rotational speed，sand inlet diameter，liquid inlet diameter，and number of blades on the three evaluation indicators （inlet‑outlet pressure ratio of mixing tank，outlet particle volume fraction，and unit volume mixing energy） exhibits differences.The influence of outlet diameter and impeller rotational speed on the inlet‑outlet pressure ratio shows a significant relationship at the 0.1 level；impeller rotational speed has a significant impact on unit volume mixing energy，with higher impeller rotational speed leading to greater unit volume mixing energy of the mixing tank；the optimal combination scheme to improve the sand mixing effect and pressure retention effect of the high‑energy mixing tank is：number of blades 4，liquid inlet diameter 203 mm，outlet diameter 240 mm，sand inlet diameter 365 mm，impeller rotational speed 800 r/min；the optimized mixing tank shows improvements in mixing time and energy consumption by approximately 12% and 22%，respectively.The relevant results can provide references for structural optimization and efficiency enhancement of similar high‑energy mixing tanks.

mixing tank  /  numerical simulation  /  structural parameters  /  orthogonal experiment  /  range analysis  /  variance analysis