共查询到20条相似文献,搜索用时 93 毫秒
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通过分析重点、难点、关键及申报工作等四个层次,以计划及活动为面,以度量、资源、三性、偏差、时限为点,以费用、进度、质量、HSE为制约,以三类资料为辅助,归纳总结创优主要问题,指明关键所在,以备借鉴。 相似文献
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哌嗪合成工艺最新进展 总被引:2,自引:0,他引:2
哌嗪是重要的医药中间体和精细化工原料,其合成方法包括乙二胺催化环化、乙二胺和乙二醇环化缩合、低析氢超电位电催化、以一乙醇胺为原料连续合成、以胺类化合物为原料合成、以环氧乙烷为原料合成以及以二乙烯三胺为原料合成等。 相似文献
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调温调湿抗菌内墙涂料的研制 总被引:1,自引:0,他引:1
以零VOC丙烯酸乳液为成膜物,以钛白粉为白色颜料,以硅藻土和定型相变储能材料为填料,以纳米TiO2/ZnO为抗菌剂,在多种助剂的配合下制备的内墙涂料,其涂膜具有自动调温、调湿、杀菌等环保、保健、节能功能。 相似文献
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以高羟基聚酯/丙烯酸树脂为基体树脂,以N-75为交联固化剂,以金红石型钛白粉、隔热粉、高岭土、硫酸钡、云母粉为颜填料,以石英砂为防滑骨料,以纳米SiO2为改性剂,在助剂和溶剂的配合下制备双组分中、面配套机车涂料,涂膜具有防滑性、抗电压击穿性、隔热性、抗风沙冲击磨蚀性及防腐蚀性等特点。 相似文献
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熔融铜渣回收铜及铜铁合金工艺研究 总被引:3,自引:0,他引:3
本文根据某炼铜熔融炉渣的矿物特性和选矿工艺特点,提出了一种"两步法"新工艺分别回收铜和铜铁合金,即低温阶段回收铜,高温阶段回收铜铁合金。该工艺对铜和铜铁合金提取比较充分,回收率均在90%以上。回收铜的品位可达99%,可直接送去火法精炼;产出的铜铁合金有害杂质少,可作为耐候钢的理想原料,其价值比纯铁高。此工艺用粉状或粒状非焦煤代替焦炭作还原剂,不用烧结,可以充分利用铜厂现有的设备,节省投资成本。该工艺简单易行,操作方便,有效实现了铜渣的资源化利用,具有良好的经济、社会和环境效益,是一种应用前景广阔的铜渣再利用工艺。 相似文献
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An Analysis of Contemporary Copper Recycling in China 总被引:5,自引:0,他引:5
Copper consumption increased very quickly in China in recent years, which could not be met by inland copper industry. In order to achieve a sustainable development of copper industry, an analysis of copper recycling in China was necessary. For the life cycle of copper products a copper-flow diagram with time factor was worked out and the contemporary copper recycling in China was analyzed, from which the following data were obtained. The average life cycle of copper products was 30 years. From 1998 to 2002, the use ratio of copper scraps in copper production, the use ratio of copper scraps in copper manufacture, the materials self-support ratio in copper production, and the materials self-support ratio in copper manufacture were 26.50%, 15.49%, 48.05% and 59.41%, respectively. The materials self-support ratios in copper production and manufacture declined year by year in recent years on the whole, and the latter dropped more quickly. The average index of copper ore and copper scrap from 1998 to 2002 were 0.8475 t/t and 0.0736 t/t, respectively; and copper resource efficiency was 1.1855 t/t. Some efforts should be paid to reduce copper ores consumption and promote copper scraps regeneration. Copper scraps were mostly imported from foreign countries because of shortage in recent years in China. Here the reasons related to copper scraps deficiency were also demonstrated. But we can forecast: when copper production was in a slow rise or in a steady state in China, the deficiency of copper scraps may be mitigated; when copper production was in a steady state for a very long time, copper scraps may become relatively abundant. According to the status of copper industry in China, the raw materials of copper production and manufacture have to depend on oversea markets heavily in recent years, and at the same time, the copper scraps using proportion and efficiency in copper industry should be improved. 相似文献
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《分离科学与技术》2012,47(9):1264-1277
Systematically shrinking copper resources and remarkably declining copper ores grade leads to the growing role of hydrometallurgical processes in manufacturing copper and accompanying metals. Technical, economical, and ecological aspects of application of hydrometallurgy were discussed with regard to dominating smelting methods. Specific conditions of in the Polish copper industry were evaluated and important aspects of necessary application of hydrometallurgy at KGHM for more effective processing of copper ores and concentrates were indicated. The hydrometallurgical unit operations compulsory in unique conditions of Polish copper industry: high content of carbonates, decreasing content of Cu, and increasing content of Pb, As, and organic carbon were analyzed. Hydrometallurgy was recognized as the only real chance for more rational utilization of metal resources from the Polish copper deposits. The advantageous chemical and mineralogical composition of Polish copper ores and concentrates and easy access to sulphuric acid additionally substantiate the need for comprehensive research work. 相似文献
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以氯化铜和氢氧化钠为原料,在无表面活性剂条件下采用水热法合成出由纳米棒组装成的叶片状氧化铜粉体。探究了在不同水热时间下产物的相结构及微观形貌的变化,进而探索产物的形成过程。利用X射线衍射(XRD)、扫描电子显微镜(SEM)和高分辨率透射电子显微镜(HRTEM)对产物的相结构及微观形貌进行分析。研究结果表明,随着水热时间的延长,产物经历了由短棒状氢氧化铜到长纤维状氢氧化铜和氧化铜混相结构再到叶片状氧化铜结构的转变。对叶片状结构中位错及堆垛层错的形成分析,证明了该微观形貌的产生可归因于不完全定向依附生长机制。 相似文献
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为了解决铜精炼过程中高温铜液温度的测量难题,确保铜精炼过程的阳极铜产品质量,基于铜精炼过程中不同阶段的热工机理,分别建立了保温过程、氧化过程以及还原过程的高温铜液温度的机理软测量模型,并采用数据预处理、黄金分割法搜索区间及其函数链神经网络校正等技术对其进行了算法设计以及编程实现.实际应用结果表明,铜精炼过程铜液温度软测量可以反映铜精炼过程铜液温度的真实变化,有助于实现铜精炼过程铜液温度软控制以及提高铜精炼过程的生产效率和生产质量. 相似文献