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保存待用.矿物主要元素分析结果见表1,XRD分析结果见图1. 表1 硫砷铜矿样品元素分析 Table 1 Chemical composition of minerals (mass fraction, %) 图1 硫砷铜矿样品的XRD谱 Fig. 1 XRD pattern of enargite sample 1.2 化学浸出实验... of temperature on enargite dissolution 2.2 不同黄铁矿配比常压化学浸出实验 在初始Fe3+浓度30.5 g/L,Fe2+浓度0.02 g/L,初始pH 1.0,浸出温度60 ℃,搅拌速度200 r/min实验条件,浸出过程中溶液电位维持(850±5) mV.考查不同黄铁矿的添加量对硫砷铜矿浸出率的影响,实验结果如图4所示.从图4可以看出,硫砷铜矿纯矿物浸出......
;Schematic diagram of working electrodes of enargite 1.4 X射线光电子能谱测定 XPS检测样品分别用1500号砂纸和1 μm的金刚石抛光膏进行打磨抛光,再将样品放在超声波中用蒸馏水清洗干净,并用冷风吹干.然后将样品放入测试液中,分别在选定的电位值下对样品进行恒电位极化,时间1800 s.之后,将样品从电解液中取出并用去氧蒸馏水冲洗,在氮气中风干...中形成表面产物的不完全可逆还原反应相关.该循环伏安曲线与VELASQUEZ等[28]的测定结果基本一致,但与PLACKOWSKI等[21]的测定结果存在一定的差别,这可能与所采用硫砷铜矿样品中杂质的类型及含量不同有关. 图2 硫砷铜矿在pH 9.2的电解液中的循环伏安曲线 Fig. 2 Cyclic voltammogram of enargite......
structure can be observed on the outer surface of the pyritic chalcopyrite residues, which contains S8 and enargite. In the porphyry chalcopyrite residues, talnakhite (Cu18.32Fe15.9S32) and chalcocite (Cu2S......
which is often found in association with copper sulphide ores. Though, it is an important source of copper, it is more significant as a source of silver and antimony. Similarly, enargite (Cu3AsS4..., tennantite and enargite among the copper-bearing minerals will reduce their economic value due to their minor element content [2], which needs to be eliminated. The removal of impurities in copper......
activated tetrahedrite, jamesonite and enargite [J]. International Journal of Mineral Processing, 2006, 81(1): 44-50. DOI: 10.1016/j.minpro.2006.06.004. [16] FERN NDEZ M A, SEGARRA M, ESPIELL F..., SHIBAYAMA A. Selective leaching of arsenic from enargite in NaHS-NaOH media [J]. Hydrometallurgy, 2010, 101(1, 2): 64-68. DOI: 10.1016/ j.hydromet.2009.11.020. [18] VIR KOVA E, FEDOR J. Leaching......
as electrochemical mechanism [7]. In the non-contact mechanism, Fe3+ is depleted through the oxidation of mineral, can significantly recover Cu from enargite in bioleaching process and the extraction rate reaches 90.9... of Nonferrous Metals Society of China, 2011, 21(7): 1634-1670. [8] TAKATSUGI K, SASAKI K, HIRAJIMA T. Mechanism of the enhancement of bioleaching of copper from enargite by thermophilic iron-oxidizing archaea......
dust. TONGAMP et al [16] used NaOH-NaHS to selectively leach arsenic from enargite (Cu3AsS4). However, they did not study the behaviors of metal impurities during leaching. These leaching media..., 2010, 181: 419-425. [16] TONGAMP W, TAKASAKI Y, SHIBAYAMA A. Selective leaching of arsenic from enargite in NaHS-NaOH media [J]. Hydrometallurgy, 2010, 101: 64-68. [17] ZHAO Zhan-chong, SHI Yi-feng......
measurement of chalcopyrite surface. VELASQUEZ et al [9] researched the electrochemical process on the surface of natural chalcopyrite as well as enargite in collectorless solutions using in-situ technology... J R, CORDOVA R, GOMEZ H, SCHREBLER R. SEM, EDX and EIS study of an electrochemically modified electrode surface of natural enargite (Cu3AsS4) [J]. Journal of Electroanalytical Chemistry, 2000, 494(2......
(3): 290-294. [15] CURRELI L, GARBARINO C, GHIANI M, ORRU G. Arsenic leaching from a gold bearing enargite flotation concentrate[J]. Hydrometallurgy, 2009, 96: 258-263. [16] 靳冉公, 王 云, 李 云, 孙留根. 碱性硫化钠浸...]. Nonferrous Metals (Metallurgy Part), 2014(7): 38-41. [17] RUIZ M C, GRANDON L, PADILLA R. Selective arsenic removal from enargite by alkaline digestion and water leaching[J]. Hydrometallurgy, 2014, 150: 20-26......
bioleaching and mineralogy of composited sulfide ores containing enargite, covellite and chalcocite by mesophilic and thermophilic microorganisms [J]. Hydrometallurgy, 2011, 105(3, 4): 213-221. DOI.... The oxidative dissolution of arsenopyrite (FeAsS) and enargite (Cu3AsS4) by Leptospirillum ferrooxidans [J]. Geochimica et Cosmochimica Acta, 2008, 72: 5616-5633. DOI: 10.1016/j.gca.2008.09.008. [27......