微细粒尾矿高效浓缩试验研究

With the huge tailings discharge every year, the tailings storage exists enormous potential safety and environmental danger. The rising dry tailings discharge technology can effectively alleviate the tailings disposal problem, and the concentration of micro-fine tailings is the core of this technology. To solve the low concentration efficiency, experiments of efficient concentration on micro-fine tailings in a gold mine in Jilin Province were carried out using the no-raking efficient thickener which was self-designed and developed by Shandong University of Science and Technology. And the effects of the main structural and operating parameters of the thickener on the micro-fine tailings concentration were studied. The results show that the micro-fine tailings can be efficiently concentrated by using the φ500 no-raking efficient thickener. Through controlling the feeding amount, the height and number of the settling cone, the concentration of micro-fine tailings (-0.010mm in size, 60.19% in content and 23.66% in concentration) could be increased more than 30%. Among these parameters, the feeding amount is the main influencing factor, then the height to diameter ratio, and the settling cone area has the minimal impact.