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Physical chemistry mechanisms of CDR system in sulphide mineral flotationTo-hyon Pak1,21. School of Civil & Environment Engineering,University of Science and Technology Beijing摘 要:sulphide minerals were first collected and acti-vated by the collector,and then depressed strongly by Ca(OH)2 in a strong alkaline solution.Finally......
Geochemistry of Rare Earth Elements in Xikeng Ag-Pb-Zn Ore Deposit, South Anhui, China WANG Dao-xuan1,YUE Shu-cang1,LI Shuang-ying1,YANG Xue-ming2,CHEN Tian-hu1 (1.Department of Resources..., a comparative study is done on the geochemical charateristics of REE in ore, ore-hosted rocks of Lantian group, granite related to ore deposit, and altered rocks for tracing origin of ore-forming......
压制压力对Cu-Ni系粉末烧结行为的影响 李世春1,宋玉强1 (1.石油大学机电学院材料系,东营,257061) 摘要:将Cu,Ni混合粉末压制成形后,用固相烧结的方法制成块状试样,研究压制压力对Cu粉和Ni粉烧结行为的影响.研究表明,增大Cu粉和Ni粉成形中的压制压力,可以促进固相烧结过程中的界面扩散和迁移,有利于Cu-Ni单相固溶体组织的形成;同时,Cu粉和Ni粉生坯和烧结体的致密度和硬度也都呈上升趋势. 关键词:粉末; 铜; 镍; 压力; 烧结; [全文内容正在添加中] ......
J. Cent. South Univ. Technol. (2008) 15: 89-94 DOI: 10.1007/s11771-008-0018-7 Formation mechanism of breccia pipe type in Yixingzhai gold deposit SHAO Yong-jun(邵拥军), ZHANG Yi-zhou... on the basic geological features of Yixingzhai gold deposit, the geological features, classification and relation to mineralization of breccia pipes were discussed by surveying the xenoliths and breccia’s......
Sulfur Isotopes Geochemistry of the Nage Cu-Pb Polymetallic Deposit, Southeast Guizhou Province, China () 摘要: The Nage Cu-Pb polymetallic deposit is located in the transitional zone of the Yangtze craton and cathaysia, that is the southwest of Jiangnan orogenic belt. The mainly strata are Wentong formation of Mesoproterozoic Sibo group and the Jialu formation (Qbj) , Wuye formation (Qbw......
Influence of Ca/S and Rolling Reduction on Shape of Sulphide in Free-cutting Steel 5NiSCa江来珠,崔昆摘 要:<正> 1.IntroductionThe shape of sulphide has a great influ-ence on machinability and transverse prop-erty of steel.It is very important to obtainoval sulphide instead of elongated one forimproving machinability and transverseproperties[1,2].关键词:......
温压工艺对Cu-Ni烧结体组织和性能的影响 李世春1,宋玉强1 (1.石油大学,机电学院,材料系,山东,东营,257061) 摘要:研究了铜和镍混合粉经冷压和一次冷压,二次温压两种压制方法成型后的烧结体的显微组织,密度和硬度.研究发现,在铜粉和镍粉反应过程中,温压工艺对烧结体显微组织,密度和硬度有重要的影响.一次冷压,二次温压成型工艺较冷压成型工艺有利于Cu-Ni单相固溶体的形成,可以提高铜粉和镍粉烧结体的密度和硬度. 关键词:温压; 铜粉; 镍粉; 烧结; [全文内容正在添加中] ......
; 局部腐蚀; 实海暴露 中图分类号: TG146 文献标识码: A Localized corrosion of Cu-Ni alloy in China marine ZHAO Yue-hong, LIN Le-yun, CUI Da-wei (General Research Institute of Nonferrous Metals, Beijing 100088... indicate there is local corrosion on Cu-Ni alloys in the immersion zone of Yulin marine, Zhoushan marine and Qingdao marine. The specimens in Yulin marine are corroded most seriously due to high......
Founder of Niobium-Tantalum Granite Deposit--Li RenkeShen Youguang摘 要:<正> Li Renke, Vice director of Nonferrous Metals Geological Research Institute of Guangxi, Senior Engineer, discovered a new type of niobium-tantalum granite deposit as his major contribution and made significant progress in ore exploration of this type of ore deposit.关键词:......
腐蚀性能,合金的腐蚀速率随腐蚀时间的延长而迅速降低,腐蚀480 h后平均腐蚀速率仅为0.010 mm/a.这是因为腐蚀后合金表面生成一层致密的Cu2O膜,随着腐蚀的进行,Cu2O膜增厚,同时外层的Cu2O膜被进一步氧化生成疏松的Cu2(OH)3Cl颗粒.合金在中性盐雾中腐蚀后,主要是a(Cu)固溶体被腐蚀,合金中的第二相仍残留在晶界处. 关键词:Cu-Ni合金；中性盐雾试验；腐蚀速率；腐蚀产物膜.... Key words: Cu-Ni alloy; neutral salt spray test; corrosion rate; corrosion product film; selective corrosion 白铜合金是目前公认的具有优良耐海水腐蚀和抗海洋生物污染的铜合金,在船舶制造,海洋工程,海滨电站和海水化工等领域得到了广泛应用[1-3].铝白铜是一类重要的白铜合金,目前比较成熟的......
