O_(3)氧化法选择性浮选分离辉钼矿和黄铜矿  

Selective flotation separation of molybdenite and chalcopyrite using O_(3) oxidation method

作　　者：张红涛 宋翔宇 黄业豪 张振 王文 徐来福 Hong-tao ZHANG;Xiang-yu SONG;Ye-hao HUANG;Zhen ZHANG;Wen WANG;Lai-fu XU(School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学化学学院,郑州450001

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第1期298-308,共11页中国有色金属学报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China (No. 51874259)。

摘　　要：研究O_(3)氧化对黄铜矿和辉钼矿浮选回收率的影响。单矿物浮选试验结果表明,在O_(3)浓度约为90 g/m^(3)、气体流量为4 L/min的条件下,黄铜矿和辉钼矿氧化2 min后,黄铜矿的浮选回收率降至16%,而辉钼矿的浮选回收率变化不大。人工混矿浮选试验结果表明,在选择性浮选黄铜矿和辉钼矿中,O_(3)氧化预处理可以代替Na2S试剂作为铜抑制剂。接触角测量结果表明,O_(3)氧化处理选择性地使黄铜矿表面具有亲水性。Zeta电位和X射线光电子能谱分析结果表明,氧化处理后黄铜矿表面产生不溶于水的亲水性氧化物和氢氧化物,使得黄铜矿更加亲水;此外,辉钼矿的表面虽略有氧化,但其表面仍保持疏水性。The effect of O_(3) oxidation on the flotation recovery of chalcopyrite and molybdenite was investigated.The results of single-mineral flotation tests showed that under the conditions that O_(3) concentration was about 90 g/m3 and the gas flow rate was 4 L/min,after chalcopyrite and molybdenite were oxidized for 2 min,the flotation recovery of the chalcopyrite dropped to 16%,while the flotation recovery of molybdenite did not change much.The results of flotation tests for the artificially mixed ores showed that O_(3) oxidation pretreatment could replace the Na2S reagent as a chalcopyrite depressant in the selective flotation separation of chalcopyrite and molybdenite.The contact angle measurements revealed that the O_(3) oxidation treatment selectively rendered the surfaces of the chalcopyrite to be hydrophilic.The Zeta potential and X-ray photoelectron spectroscopy analyses revealed that the chalcopyrite surface most likely became hydrophilic due to the formation of water-insoluble hydrophilic oxides and hydroxides on the mineral surface after the oxidation treatment.In addition,although the surface of the molybdenite was slightly oxidized,its surface remained good hydrophobicity.

关 键 词：黄铜矿 辉钼矿 O_(3)氧化 选择性浮选 亲水性 

分 类 号：TD95[矿业工程—选矿] TD923