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| 1 | 硫化铜矿物电子结构的第一性原理研究显示文摘基于密度泛函理论的平面波赝势方法,计算黄铜矿、辉铜矿、铜蓝、斑铜矿的电子结构性质,并讨论硫化铜矿物电子结构与其可浮性之间的关系。利用费米能级讨论不同硫化铜矿物参与化学反应的活性位置及其与黄药作用生成不同产物的原因。计算结果表明:黄铜矿禁带宽度为0.99 eV,属于直接带隙p型半导体,而辉铜矿、铜蓝、斑铜矿则为导体。前线轨道计算结果能够很好地解释4种硫化铜矿物氧化性差异。为进一步认清硫化铜矿物可浮性的差异及硫化铜矿物新药剂开发提供理论参考。 | 陈建华 王进明 龙贤灏 郭进 | 2011 | 中南大学学报(自然科学版)2011，42，12： | 17 |
| 2 | Investigating the first-order flotation kinetics models for Sarcheshmeh copper sulfide ore显示文摘This study was performed in two phases of work.In the first stage,four conventional first-order flotation kinetics models were fitted to the measured recoveries data and the best model were selected.In the second stage,influence of pH,solid concentration,water chemistry and the amount of collector dosage were investigated on kinetics parameters including flotation rate constant and ultimate recovery.The results indicated that that perfectly mixed reactor model and Kelsall model gave the best and the weakest fit to the experimental data,respectively.It was observed that flotation rate constant and ultimate recovery were strongly affected by chemical factors investigated especially water quality.The flotation rate constant decreased with increasing the solids content,while ultimate recovery increased to certain value and thereafter reduced.It was also found that the most values of flotation rate constant and ultimate recovery obtained in dosage of collector are 30 and 40 g/t,respectively. | Asghar Azizi Ahmad Hassanzadeh Behnam Fadaei | 2015 | International Journal of Mining Science and Technology2015，25，5： | 12 |
| 3 | Mechanochemical sulfidization of a mixed oxide-sulphide copper ore by co-grinding with sulfur and its effect on the flotation efficiency显示文摘Mechanochemical sulfidization of a mixed sulfide/oxide copper ore by co-grinding with sulfur and additives including Mg(NO3)2 and Fe(NO3)3 salts and iron,aluminum and magnesium powders was investigated for the first time.Also,the influence of sulfidization during the wet-milling process was examined on the separation efficiency and recovery of copper in detail.The results demonstrated that co-grinding with sulfur solely had the best flotation performance at the value of 0.5 wt.%and it was attributed to the possible existence of S\\O bonding on copper oxides surfaces.In addition,adding magnesium nitrate salt,magnesium powder,iron nitrate salt and aluminum powder as additive associated with 0.5 wt%sulfur into ball milling caused the flotation improvement at the amounts of 0.2 wt%,0.2 wt%,0.5 wt%and 0.5 wt%,respectively.Also,the effect of grinding time and sulfidization pH with 0.5 wt%sulfur solely was determined and pH s of 7.5 to 8.5 gave the best results.The highest recovery(75.76%)and separation efficiency(63.44%)were achieved at pH of 7.5 and 8.5,respectively. | Mojtaba Masdarian Asghar Azizi Zahra Bahri | 2020 | Chinese Journal of Chemical Engineering2020，28，3： | 4 |
| 4 | Effect of pyrite content of feed and configuration of locked particles on rougher flotation of copper in low and high pyritic ore types显示文摘Misreported pyrite into copper concentrates dramatically declines copper grade and recovery. Copper flotation can be also more complicated if flotation feed comes from an elevated-pyritic copper ore. In this investigation, the effect of two different ore types(high pyritic and low pyritic feeds) was studied on rougher stage of industrial copper flotation circuit. Samples were taken from different streams and the structure of chalcopyrite within the pyrite and non-sulfide gangue minerals was examined in various size fractions for mentioned ore types. Results indicated that 72% and 56% of the total floated pyrite was transferred to concentrate in first four cells in the low and high pyritic feeds, respectively. Whereas, this proportion for floated SiO_2 in last ten cells was detected as 72% and 71%, respectively. A detailed interpretation of the effect of locked particles in different size fractions on rougher flotation cells is studied from industrial point of view. | Sahar Agheli Ahmad Hassanzadeh Behzad Vaziri Hassas Mohammad Hasanzadeh | 2018 | International Journal of Mining Science and Technology2018，28，2： | 3 |
| 5 | 凝灰岩矿泥影响氧化铜矿浮选过程的机理显示文摘凝灰岩型氧化铜矿浮选过程中,矿泥对浮选过程产生严重影响。采用SEM-EDS对矿泥、浮选精矿和尾矿的形貌及矿物组成进行表征,测量矿泥比表面积,药剂吸附量,研究矿泥对捕收剂的吸附特性。结果表明:凝灰岩矿泥表面为鳞片、薄片状,比表面积大,对捕收剂吸附活性高。提高矿浆温度,取消起泡剂,氧化铜矿浮选效果得到改善。一粗两精三扫、中矿顺序返回的闭路流程能够获得品位21.40%、回收率86.25%的铜精矿。 | 熊堃 左可胜 郑贵山 | 2016 | 中国矿业2016，25，1： | 1 |
| 6 | 银含量对方铅矿浮选的影响及其机理研究进展显示文摘为了阐明银含量对方铅矿浮选的影响,提高含银方铅矿中伴生银的综合回收效率,通过全面梳理前人研究成果,对含银方铅矿的资源状况、工艺流程和药剂制度进行了总结。首先,从不同维度和层面(从试验到模拟、从宏观到微观)综述了银含量对方铅矿的影响,其中包括银含量对方铅矿浮选行为及表面接触角的影响。然后,评述了前人利用红外光谱、微热动力学、电化学和量子化学等分析方法开展的有关银含量对方铅矿浮选行为影响机理的研究进展,上述分析方法相互验证,均证实银矿物对方铅矿的浮选有促进作用,且银含量与促进程度呈正相关。最后,针对含银方铅矿今后研究方向和银铅锌矿资源开发,提出科学、合理的建议,如:在现场生产中应尽量避免使用石灰调浆,如必须使用时,应控制好石灰用量,从而减少伴生银的损失。 | 王国彬 蓝卓越 王瑞康 赵清平 杨迪 李博琦 | 2021 | 黄金科学技术2021，29，5： | 1 |
| 7 | 能带理论在铜冶炼渣浮选中的应用及展望显示文摘阐述了铜冶炼渣区别于铜原矿的特殊性质及当前铜渣浮选的问题,重点介绍了固体物理学中的能带理论体系为解决铜渣浮选问题提供的新思路。介绍了半导体的能带结构及检测手段;并由铜渣中常见4种硫化铜矿物黄铜矿、辉铜矿、铜蓝、斑铜矿的能带结构分析其电化学性质,由他们的电子态密度预测其浮选行为,发现辉铜矿中的铜原子具有最高的反应活性。通过捕收剂和各种矿物的静电位与费米能级推断它们相互作用后的产物,利用NPA电荷等分析证明了产物黄原酸盐反应活性优于双黄药,符合红外光谱等试验的结果。能带理论体系下的电子态密度、禁带宽度、费米能级、电荷布居数等体相性质参数能有效解释矿物的可浮性,以此可额外作为药剂与矿物作用效果的有力判据,从而使传统矿物基因数据库更为完备。离子型捕收剂的前线分子轨道与矿物的边缘能级之间有着密切的电子转移,根据前线轨道的形状与能量值比较同类药剂间捕收能力的大小;利用密度泛函法分析药剂对铁和铜的选择性差异的机理,以此筛选出高选择性与高捕收能力的基团,设计并优化新型捕收剂的构型。讨论了能带理论应用于铜渣浮选研究中的后续方向,致力于将更精确的能带检测方法与更高效的软件计算模拟相结合。 | 迟晓鹏 叶子涵 衷水平 陈杭 饶峰 | 2022 | 金属矿山2022，51，4： | 0 |
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