黄铜矿和黄铁矿的浮选分离

从矿石的结构、半导体性质及电化学等方面论述了黄铁矿和黄铜矿的可浮性及其浮选分离方法．     

有机抑制剂CTP与黄铁矿,黄铜矿的作用机理

采用接触角测定、动电位测定、吸附量测定及紫外光谱等多种手段研究了不同碱性介质中ＣＴＰ与矿物表面的作用机理。结果表明ＣＴＰ阴离子与黄铁矿表面发生化学吸附,而与黄铜矿表面作用较弱;在混合精矿体系中,ＣＴＰ在选择性吸附于黄铁矿表面的同时解吸了矿物表面的黄药。在钙离子存在条件下,ＣＴＰ与黄铁矿和黄铜矿作用差距变大。     

双硫氮的捕收性能及作用机理研究

对双硫氮与三种矿物(黄铜矿、方铅矿和黄铁矿)的作用体系分别进行了浮选试验、分子力学模拟计算和红外光谱分析研究,纯矿物浮选试验表明,双硫氮对黄铜矿和方铅矿有较好的浮选效果,双硫氮与黄铁矿的相互作用受OH-影响较大,只有在酸性条件下才能浮选黄铁矿;人工混合矿试验验证了单矿物试验的结论,在p H 6~10、用双硫氮作捕收剂的条件下,黄铜矿和黄铁矿的浮选分离达到了很好的效果。分子力学模拟计算结果和红外光谱分析较好地解释了浮选试验的结果。     

硫化铜矿加压预氧化浸出行为研究

含铜难处理金矿直接氰化浸出率一般较低, 氰化物耗量大, 需经预氧化浸出除去含铜杂质后再氰化浸出。以硫化铜矿物为研究对象, 在添加氯盐的酸性体系中, 开展了黄铜矿加温、加压预氧化浸出过程研究。探讨了预氧化温度、氧气压力、起始硫酸用量、起始氯化钠浓度等对黄铜矿中铜、铁浸出的影响行为。通过理论分析、浸出液化学分析以及黄铜矿预氧化浸出渣的X射线衍射测试研究了黄铜矿酸性体系预氧化浸出的反应历程和预氧化浸出渣的成分。结果表明, 氧化反应初期, 氧气分压、起始硫酸用量、氯化钠用量越大, 铜越容易被浸出, 而氧化后期氧气压力对铜浸出影响较小。预氧化浸出过程中有Cu₉Fe₉S₁₆、Cu₃₉S₂₈及黄钠铁矾和草黄铁矾生成, 而黄钠铁矾和草黄铁矾为渣中的最终产物。     

Initial results of CdS/CuInTe2 heterojunction formed by flash evaporation

The CuInTe₂ thin films is one of the most attractive semiconductors for solar cells applications, since its direct band gap energy (Eg≈1 eV) is suitable as an absorber in photovoltaic conversion. In this letter the CuInTe₂ thin films are prepared by flash evaporation technique. X-ray diffraction measurements on the as-deposited CuInTe₂ film showed that these films consist mainly of the chalcopyrite phase. The junction formation in the n-CdS/p-CuInTe₂ cell has been investigated using current–voltage (I–V) and capacitance-voltage (C–V) measurements.     

硫化钠对黄铜矿无捕收剂浮选的影响

给出了碱性介质中硫化钠作还原电位调整剂时黄铜矿的无捕收剂浮选(称有硫化钠无捕收剂浮选)的行为。通过矿浆电位测试、伏安曲线、HS~-在黄铜矿表面吸附量测定和中性硫的溶剂提取一化学分析,较详细地研究了HS~-降低电位的作用和在黄铜矿表面的吸附行为。研究结果表明,经硫化钠调浆的黄铜矿矿浆的铂电位(即矿浆电位)迅速下降,在硫化钠自身调控的还原电位下,HS~-难以在黄铜矿表面发生电化学吸附;但在恒电位仪控制的高电位下,HS~-可以在黄铜矿表面发生电化学吸附。因此,HS~-存在并不能明显降低黄铜矿无捕收剂浮选的矿浆电位下限,黄铜矿有硫化钠无捕收剂浮选的矿浆电位下限与无硫化钠无捕收剂浮选(称自诱导浮选)的矿浆电位下限接近。     

Evaluation of alternative flotation technologies for copper cleaning & copper/nickel separation at Inco's Thompson mill

At Inco's Thompson Mill the predominant nickel and copper minerals are pentlandite and chalcopyrite respectively. Following bulk sulphide flotation, where soda ash is added as the pH modifier, sodium amyl xanthate as the collector and MIBC as the frother, slaked lime is added to depress the pentlandite and effect copper/nickel separation.Pursuit of an overall improvement of copper/nickel separation resulted in the pilot testing of column, Jameson and Outokumpu HG flotation cells. The pilot plants were run in parallel with the existing Denver DR30 flotation cells. The paper compares the metallurgical performance of the various flotation devices when applied to copper/nickel separation and copper cleaning. Based on copper/nickel and copper/gangue separation efficiencies, columns are shown to be the superior flotation device.     

蒙古某铜矿伴生金银浮选回收工艺技术研究

蒙古某铜矿含铜0.61%,含硫2.57%,含金0.80g/t,含银15.12g/t,矿石中铜矿物主要为黄铜矿、斑铜矿及辉铜矿,脉石矿物有石英、长石、云母等。矿石中金、银等有价元素与黄铜矿、黄铁矿等金属矿物之间嵌布关系密切。本文研究针对该矿石特征,采用铜优先-铜和脉石浮选分离工艺流程,粗选采用选择性捕收剂BKH优先选铜,精选采用新型抑制剂BKL抑制脉石矿物,最终获得实验室闭路试验结果为：铜精矿含铜24.85%,铜回收率81.88%;含金21.87g/t,金回收率55.00%;含银515.80g/t,银回收率68.89%。     

Synthesis of hexagonal structured wurtzite and chalcopyrite CuInS2 via a simple solution route

Wurtzite semiconductor CuInS₂ [CIS] has been reported in recent years. As a kind of metastable structure, it is a great challenge to synthesize pure wurtzite CIS at low temperature. In this paper, via a simple and quick solution route, we synthesize both wurtzite- and chalcopyrite-structure CIS. Well-controlled wurtzite CIS hexagonal plates are obtained when an appropriate agent is added. The influence of the used agent triethanolamine [TEA] has also been studied, and it turns out that without TEA, chalcopyrite CIS with a kind of rare morphology is formed through this method.     

源自硫化矿区的Acidiphilium属菌的分离及其浸矿性能

从湖北大冶铜矿的铜山口硫化矿矿坑水中分离得到了一株嗜酸兼性异养细菌,暂命名为DY.该菌株为革兰氏阴性细菌,短杆状,菌体大小为(0.4±0.1)μm×(1.2±0.2)μm,最适生长温度为30 ℃,最适初始生长pH值为3.5,能利用葡萄糖、乳糖、蔗糖和单质硫生长,不能利用FeSO4进行生长.其系统发育树结果表明,菌株DY与Acidiphilium cryptum(Y18446)位于系统发育树的同一分支中,相似度为99.69%.黄铜矿(CuFeS2)摇瓶细菌浸出实验显示,DY菌株单独浸出黄铜矿的能力较弱,但和嗜酸自养的氧化亚铁硫杆菌ATCC 23270混合浸矿时,与氧化亚铁硫杆菌单独浸矿相比,30 d后黄铜矿的浸出率提高了35.98%.