高频超声波作用下黄铁矿的浮选性能及动力学研究  

Flotation Kinetics of Pyrite Under High-frequency Ultrasonic Treatment

作　　者：严文超 胡法林 曹沁波[1] YAN Wenchao;HU Falin;CAO Qinbo(Faculty of land resources engineering, Kunming university of science and technology, Kunming 650093, Yunnan)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《矿产保护与利用》2021年第5期83-88,共6页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金地区基金(22068020)。

摘　　要：研究了超声波作用下黄铁矿的浮选行为。结果表明,在磨矿细度为-0.074 mm占57%、丁基黄药200 g/t、起泡剂20 g/t的浮选最佳条件下,在超声波频率为135 kHz和功率为100 W时可以使黄铁矿回收率提高13.86%。通过超声波浮选和常规浮选的动力学分析发现,高频超声波对-150+100μm粒级的黄铁矿影响最大,使回收率提高了7.54%;对该粒级的试验数据利用五个动力学模型拟合可知,一阶经典模型的拟合效果最好,动力学方程可分别表示为超声波浮选:ε=26.27[1-exp(-0.601t)]、常规浮选:ε=18.01[1-exp(-0.671t)]。利用SEM分析发现,超声波主要通过对黄铁矿表面的清洗作用,去除了表面罩盖的矿泥等脉石矿物,提高了黄铁矿的回收率。This paper studies the flotation behavior of pyrite under the action of ultrasound.The results show that under the best conditions of flotation with a grinding fineness of-0.074 mm accounting for 57%,200 g/t butyl xanthate,and 20 g/t foaming agent,the ultrasonic frequency is 135 kHz and the power is 100 W can increase the recovery rate of pyrite by 13.86%.The results of ultrasonic flotation and standard flotation showed that the high frequency ultrasonic treatment had the greatest influence on the flotation of pyrite of-150μm+100μm size fraction,and the recovery was improved by 7.54%.Five kinetic models are used to fit the experimental data of this particle size.The results show that the classical first-order flotation kinetic model gave excellent fits to the experimental data,and the description of kinetic equation is ultrasonic treatment flotation:ε=26.27[1-exp(-0.601t)],standard flotation:ε=18.01[1-exp(-0.671t)],respectively SEM analysis showed that the recovery of pyrite was improved mainly by the cleaning of surface.

关 键 词：超声波处理 黄铁矿 浮选动力学 表面清洗 

分 类 号：TD925[矿业工程—选矿] TD971.6