超声波协同絮凝剂强化全尾砂料浆沉降试验研究OA

This study investigates the application of ultrasonic waves to enhance the sedimentation and thickening efficiency of unclassified tailings slurry.Single-factor tests were first conducted to identify the optimal ultrasonic conditions and preliminary flocculation parameters and obtain sedimentation ve-locity and underflow concentration of the slurry.Response surface Methodology(RSM)was employed to determine the optimal flocculation parameters and sedimentation velocity and to investigate the ultra-sonic-induced sedimentation mechanism of tailings slurry.Results show that:① When ultrasonic waves at 20 kHz and 90 W were applied for 10 minutes after 3 minutes of sedimentation,the slurry sedimenta-tion velocity reached 128.16cm/h,and the underflow concentration was 70.3%after 2 hours of sedi-mentation,a 4.24 percentage points improvement over natural sedimentation.② Under ultrasonic con-ditions,the addition of 30 g/t of CPAM with a concentration of 0.1%and a molecular weight of 12 mil-lion reduced the rapid sedimentation time from 15 minutes to 3 minutes,achieving a sedimentation ve-locity of 537.84 cm/h and an underflow concentration of 70.27%.③ RSM optimization revealed that adding 30.72 g/t of CPAM with a concentration of 0.11%and a molecular weight of 11.76 million re-sulted in an optimal sedimentation velocity of 573.96 cm/h.④ Ultrasonic waves achieved slurry floc densification through cavitation and thermal effects,thereby enhancing slurry thickening efficiency.