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软弱地层隧道掘进的超前支护方法谢凤琴,宗熙摘 要:<正> 软弱或多变地层中的掘进是一项费钱有时又很复杂的工作,通常需使用掩护支架或专用的隧道掘进机,或使用昂贵的地层冻结或化学处理方法.意大利一家公司升发了一种安全并有一定竞争力的方法,这是将缘于Sandvik 技术的 Tubex 钻孔系统与使用灌浆关键词:......
软弱破碎矿体开采的复合支护技术汪洋1,孟艳平2,盛佳3,李向东3,郑伯坤31. 山东盛大矿业有限公司2. 崇礼紫金矿业有限责任公司3. 长沙矿山研究院有限责任公司摘 要:针对某铁矿井下从较稳定到极度破碎的复杂多变矿岩,开发了一种可随矿岩地质情况变化而变化的复合支护技术,介绍了该系列支护技术的结构.目前,该类复合支护技术已在某铁矿得到广泛应用,并取得了显著的效果.关键词:破碎矿岩;复合支护;树脂长锚索;U型拱架;......
Trans. Nonferrous Met. Soc. China 28(2018) 1241-1247 Flotation and electrochemical behaviors of chalcopyrite and pyrite in the presence of N-propyl-N′-ethoxycarbonyl thiourea Shuang-ke LI, Guo-hua GU...: The characteristics of N-propyl-N′-ethoxycarbonyl thiourea (PECTU) were studied in the flotation experiments of chalcopyrite and pyrite compared with butyl xanthate (BX). The interaction mechanism between mineral......
Trans. Nonferrous Met. Soc. China 30(2020) 1091-1101 Electrochemical mechanism and flotation of chalcopyrite and galena in the presence of sodium silicate and sodium sulfite Ye ZHANG1,2, Run-qing... 410100, China Received 27 June 2019; accepted 18 February 2020 Abstract: The electrochemical mechanism involved in the selective separation of chalcopyrite from galena was investigated by flotation......
for Nonferrous Metals, Beijing 100088, China) Abstract: The flotation behaviors of chalcopyrite, pyrite, and sphalerite in the present or absent of collector were studied. The relationship between the floatability and the pulp potential was simulated through flotation test and electrochemical calculation. When the pulp pH value is lower than 4.0, chalcopyrite can be floated in the potential range from 0......
黄铜矿和闪锌矿的X射线衍射分析和化学组成.由图1和表1可见,试验所用的黄铜矿和闪锌矿纯度较高,符合试验要求. 试验用的黄原胶,丁基黄药,盐酸,氢氧化钠均是从上海思域化工有限公司购买的分析纯药剂,蒸馏水为实验用水. 图1 黄铜矿和闪锌矿的XRD谱 Fig. 1 XRD patterns of chalcopyrite(a) and sphalerite(b) 表1 黄铜矿和闪锌矿化学组成分析 Table 1 Chemical composition of chalcopyrite and sphalerite 1.2 浮选实验 称取2 g硫化矿物放入XFGII-5型挂槽浮选机的浮选槽中,后在浮选槽中加入蒸馏水40 mL,启动浮选机搅拌混匀,根据试验要求矿浆pH使用盐酸或氢氧化钠调节,依次加入黄原胶抑制剂,丁基黄药捕收剂,MIBC......
液加入密封的烧杯中,在pH值为12,转速为1200 r/min条件下搅拌24 h,过滤后真空干燥. 图1 黄铜矿单矿物的XRD谱 Fig. 1 XRD pattern of chalcopyrite monomineral 试验所用次氯酸钠,焦亚硫酸钠活化后的黄铜矿样品制取方法如下,取若干氰化黄铜矿样品置于XFG-Ⅱ浮选机的40 mL有机玻璃槽中,分别加入适量的3 mL...进行量热试验较为合适. 图3 丁基黄药用量和活化剂用量对氰化黄铜矿回收率的影响 Fig. 3 Effects of butyl xanthate(a) and activator(b) dosages on recovery of cyanide chalcopyrite 次氯酸钠为强氧化剂,当其用量较低时可优先对CN-起氧化作用[15],由图3(b)可看出,随着次氯酸钠......
文献标志码:A 文章编号:1672-7207(2010)04-1234-06 Chalcopyrite bioleaching by moderate thermophilic bacteria... microscopy. The chalcopyrite bioleaching by moderate thermophilic bacteria was studied, the bacterial morphology, physiological and biochemical characteristics were described and the mechanism of chalcopyrite......
Trans. Nonferrous Met. Soc. China 29(2019) 617-624 Bioleaching of chalcopyrite with different crystal phases by Acidianus manzaensis Zhen-yuan NIE1, Wei-wei ZHANG1, Hong-chang LIU1,2, Hong-rui ZHU1... December 2017; accepted 17 May 2018 Abstract: Bioleaching of chalcopyrite with different crystal structures (α-phase, β-phase and γ-phase) by Acidianus manzaensis was comparatively studied by synchrotron......
GGA-PW91. 2 结果与讨论 2.1 能带和态密度分析 黄铜矿和方铅矿晶体的能带结构及原子分态密度图如图1和2所示. 图1 黄铜矿的能带结构和各原子分态密度 Fig. 1 Band structure(a) and partial density of states (PDOS)(b) of chalcopyrite 图2 方铅...的Mulliken布居数越小,成键的离子性越强.在同一基组条件下,黄铜矿与方铅矿的原子Mulliken布居数见表2,键的Mulliken布居数见表3. 图3 黄铜矿(101)解理面上各原子的分态密度对比 Fig. 3 Comparison of PDOS of atoms on chalcopyrite (101) surface 图4 方铅矿晶体与(100......