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过程工程学报 ›› 2024, Vol. 24 ›› Issue (11): 1335-1343.DOI: 10.12034/j.issn.1009-606X.224074CSTR: 32067.14.jproeng.224074

• 研究论文 • 上一篇    下一篇

二氢杨梅素在黄铜矿与方铅矿浮选分离中的作用机理

秦双1,2， 方建军1,2*， 何海洋1,2， 邱芝莲1,2， 彭礼国1,2， 董诗钦1,2   

  1. 1. 昆明理工大学国土资源工程学院，云南 昆明 650093 2. 云南省战略金属矿产资源绿色分离与富集重点实验室，云南 昆明 650093
  • 收稿日期:2024-03-04 修回日期:2024-04-26 出版日期:2024-11-28 发布日期:2024-11-27
  • 通讯作者: 方建军 ruiyuanju@126.com

The role and mechanism of dihydromyricetin in the flotation of chalcopyrite and galena

Shuang QIN1,2,  Jianjun FANG1,2*,  Haiyang HE1,2,  Zhilian QIU1,2,  Liguo PENG1,2,  Shiqin DONG1,2   

  1. 1. College of Land and Resources Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China 2. Yunnan Provincial Key Laboratory of Green Separation and Enrichment of Strategic Metal Mineral Resources, Kunming, Yunnan 650093, China
  • Received:2024-03-04 Revised:2024-04-26 Online:2024-11-28 Published:2024-11-27
  • Contact: FANG Jian-jun ruiyuanju@126.com

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摘要： 通过纯矿物浮选试验、接触角测量、紫外分光光度计(UV)和X射线光电子能谱(XPS)分析考察了二氢杨梅素(DMY)对黄铜矿和方铅矿浮选行为的影响，并研究了DMY对方铅矿的抑制作用机理。在人工混合矿浮选试验中，使用1.0×10-4 mol/L的DMY作为抑制剂，获得铜精矿品位和回收率分别为29.28wt%和99.04%，铅精矿品位和回收率分别为86.29wt%和87.55%。接触角测量结果表明，加入DMY后方铅矿接触角降低了13.78°，显著影响了方铅矿表面的润湿性。吸附量测试结果表明，方铅矿对DMY的亲和力大于黄铜矿，同时经DMY处理后，方铅矿表面捕收剂吸附量显著降低，而黄铜矿的变化较小，这种捕收剂吸附量的差异进一步增大了两者的可浮性差异。XPS分析结果表明，DMY的羟基与方铅矿表面氧化的金属氢氧化物通过Bronsted酸碱相互作用形成氢键，并吸附于矿物表面，从而阻碍了捕收剂与矿物的作用。

关键词: 黄铜矿, 方铅矿, 浮选分离, 二氢杨梅素, 抑制机理

Abstract: This study investigated the effect of dihydromyricetin on the flotation behavior of chalcopyrite and galena throught pure mineral flotation test, contact angle measurement, ultraviolet spectrophotometer and X-ray photoelectron spectroscopy analysis. At the same time, the mechanism of dihydromyricetin on the inhibition of galena was also studied. The research results indicate that the flotation index of single mineral is in good condition. When using 1.0×10-4 mol/L dihydromyricetin in the flotation test of artificial mixture, the grade and recovery rate of copper concentrate are 29.28wt% and 99.04%, respectively, and the grade and recovery rate of lead concentrate are 86.29wt% and 87.55%, respectively. The larger the contact angle on the mineral surface, the more hydrophobic and floatable of the mineral is. The contact angle measurement show that after adding dihydromyricetin, the contact angle of chalcopyrite decreases by 5.40°, while the contact angle of galena decreases by 13.78°, which significantly affects the wettability of galena surface. The adsorption capacity test results show that the galena has a higher affinity for dihydromyricetin than chalcopyrite. After treatment with dihydromyricetin, the adsorption capacity of galena on the mineral surface significantly decreases, while the adsorption capacity of chalcopyrite changes slightly. The difference in the adsorption amount of the collector further increases the floatability difference between the two. The XPS results show that the content of Pb(OH)2 increases significantly after dihydromyricetin treatment, from 11.72% to 24.73%, and the hydroxyl group of dihydromyricetin and the metal hydroxide oxidized on the surface of galena are adsorbed on the mineral surface through the interaction of Bronsted acid and alkali, which hinders the interaction between the collector and the mineral, what's more, this leads to two different flotation phenomena of chalcopyrite and galena.

Key words: chalcopyrite, galena, flotation separation, dihydromyricetin, mechanism of depression