5 research outputs found

    Research on Developing Strategies of Zijin Mining

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    本人从战略的角度回顾了紫金矿业集团股份有限公司(以下简称为“紫金矿业”)的发展历程,分析了公司的现状和成功经验及存在问题,提出了公司在未来一定时期的发展战略,把公司的历史划分为四个阶段:即初始维持阶段、迅速发展阶段、全面扩展阶段和重要发展机遇期;第一阶段和第二阶段以紫金山金矿开发前后为分界,第二和第三阶段划分以公司成功进行股份制改造并向区外拓展业务为界线,第三和第四阶段则以公司成功上市为界线。第一阶段公司规模极小,以维持为主,也谈不上什么战略;第二阶段公司抓住紫金山金矿开发机遇,克服诸多困难和挑战,战略方向正确,企业得到了迅速发展;第三阶段在解决了企业体制问题后,大举向外拓展,获得了市场的先机...This article retrospects from the strategical point of view the development course of Zijin Mining Group Co., Ltd. (hereinafter referred as “Zijin” or “the Company”), analyses the Company’s status quo, successful experiences and problems in existence, and forwards the developing strategies for a certain period of time in the future. The development course of the Company can be divided into four st...学位:工商管理硕士院系专业:管理学院高级经理教育中心(EMBA项目)_高级管理人员工商管理硕士(EMBA)学号:X20021512

    Study on dissolution behaviors of chalcopyrite in acid solution

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    为了探索黄铜矿低温常压湿法氧化(O2)浸出的可行性,研究了黄铜矿在酸性介质中的溶解行为,考察了温度、酸浓度及溶浸时间等对黄铜矿酸浸行为的影响,计算了酸浸过程中铜的浸出率,分析了元素硫的变化行为及残渣微观结构。结果表明,黄铜矿常压湿法氧化(O2)浸出过程的酸浸阶段会产生硫化氢;黄铜矿的溶解能力随温度变化先快后慢,后段接近线性增长,溶解主要发生在前2小时;低温有利于溶解,而最适酸浸pH约-0.4。pH对溶解的影响小于温度的影响。The dissolvability behaviors of chalcopyrite in acid solvent,including the influences of temperature,pH value and the acidic leaching time on the dissolvability behaviors of chalcopyrite,are studied to probe the feasibility of hydro-oxidation leaching at normal pressure and low-temperature.The changing behaviors of elemental sulfur and the microstructure of the residue are also analyzed.The results show that:①sulfureted hydrogen can be produced in the acidic leaching of chalcopyrite's wet oxidation at ordinary pressure and low-temperature;②the dissolvable capacity of chalcopyrite change with time fleetly at first then slowly,which is linear increase at the later part,the dissolution occurs mostly at 2 hours afore;③low temperature is beneficial to the dissolution and the optimum pH value is-0.4.And the influence of temperature is stronger than that of pH

    半导体纳米微粒/聚苯胺复合材料的制备和性能研究

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    简述了近年来新发展的几种半导体纳米微粒/聚苯胺复合材料的构建方法,总结了半导体纳米微粒/聚苯胺复合材料性能表征的部分工作,讨论了半导体纳米微粒的尺寸大小、粒度分布及复合材料的光学和光电化学性能研究等

    制备条件对纳米ZnO溶胶性质的影响

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    采用溶胶 凝胶法 ,以醋酸锌和氢氧化锂为主要原料制备了纳米ZnO溶胶。同时利用透射电镜、紫外 吸收光谱和荧光光谱研究了不同制备条件如陈化时间和加水量对纳米ZnO溶胶胶粒尺寸和性质的影响。结果表明 ,通过改变陈化时间或加水量可以有效地对纳米ZnO胶粒的尺寸进行控制 ,从而容易地改变纳米ZnO溶胶的光吸收和发光等光学性能

    ZnO/聚苯胺复合膜的制备和性能表征

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    采用电化学组装法 (ECA)和溶胶 凝胶法 (sol gel)的联用技术在对胺基苯硫酚 (PATP ,ρ aminothiophenol) Au电极上制备ZnO 聚苯胺(PANI ,polyaniline)复合膜 ,并用TEM ,SEM ,XPS等对ZnO溶胶和ZnO PANI复合膜进行表征。同时还利用紫外 可见吸收光谱、荧光光谱和光电流谱研究了ZnO胶体、ZnO微粒膜和ZnO PANI复合膜的性能。结果表明 ,ZnO PANI复合膜具有优良的发光性能和光电化学转换效率 ,可作为发光纳米材料和处理含有甲基橙的废
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