矿产保护与利用2025，Vol.45Issue(2)：93-101,9.DOI:10.13779/j.cnki.issn1001-0076.2025.02.007
超声波处理聚丙烯酰胺对辉钼矿浮选的影响及机理研究
Effect and Mechanism of Ultrasonic Treatment of Polyacrylamide on Molybdenite Flotation
摘要
Abstract
The flotation process of molybdenum ore produces a large amount of mineral processing wastewater.To make the mineral processing wastewater meet the reuse requirements,the flocculant olyacrylamide(PAM)is usually added to accelerate the settlement of micro-grained slime so that the upper water can be reused.However,the accumulation of PAM in wastewater seriously depresses the flotation of molybdenite and reduces its recovery with the increase in the recycling times of mineral processing wastewater.The influence of PAM on molybdenite flotation behavior was investigated,and ultrasonic crushing technology was used to treat the mineral return water containing PAM.The influence rule and mechanism of the mineral return water containing PAM after ultrasonic treatment on the flotation behavior of molybdenite were investigated.The results showed that the presence of PAM greatly reduced the surface hydrophobicity of molybdenite and depressed the flotation of molybdenite,and the depression effect was enhanced with the increase of PAM mass concentration.The floatability of molybdenite recovered after PAM was treated by ultrasound.The flotation recovery of molybdenite reached 68.63%after 5 mg/L PAM solution was ultrasonic treated for 9 min at 600 W power.Further study showed that the micro-gas nucleated cavitation bubbles in solution vibrate under ultrasonic,grow and collapse under a certain sound pressure.It is accompanied by the production of free radicals,which can crush and oxidize and degrade PAM,and the molecular weight of PAM decreased rapidly.Treatment of PAM by ultrasonic crushing technology could improve the reuse rate of molybdenum ore dressing wastewater,the flotation recovery of molybdenite,and the recycling efficiency of water resources.关键词
辉钼矿浮选/选矿回水/聚丙烯酰胺/超声波Key words
molybdenite flotation/mineral return water/polyacrylamide/ultrasonication分类
矿山工程引用本文复制引用
祁梦瑶,沙津汀,罗振恺,彭伟军,曹亦俊,王伟,张龙玉,黄宇坤..超声波处理聚丙烯酰胺对辉钼矿浮选的影响及机理研究[J].矿产保护与利用,2025,45(2):93-101,9.基金项目
2024 年河南省自然科学基金面上项目(242300420002) （242300420002）
郑州大学青年教师培育基金(JC23563033) （JC23563033）
中原关键金属实验室"高峰"攀登科技项目(GJJSGFYQ202334) （GJJSGFYQ202334）
