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收稿日期:1999-11-15 基金:国家自然科学基金!资助项目 ( 5980 4 0 0 4 ;59674 0 2 2 1 );国家杰出青年科学基金!资助项目 ( 5972 540 8); Recovering RE with NH4Cl roasting from bastnasite crude ore Abstract: The optimum conditions of stripping fluorine for Sichuan bastnasite crude ore were determined by orthogonal experiments. Over 95% fluorine in the crude ore was stripped......
Self-polymerization and co-polymerization kinetics of lead methacrylateYu-Juan Zhang1,Xin-Tao Guo2,Chun-Hong Wang1,De-Feng Wu1,Ming Zhang11. School of Chemistry and Chemical Engineering,Yangzhou...(XRD) were used to characterize the molecular and crystal structure of lead methacrylate [Pb(MAA)2] which was produced by the double decomposition reaction of lead oxide and methacrylic acid.Isothermal......
; 文献标志码:A 文章编号:1672-7207(2012)07-2489-06 Volatilization behavior of metals from silver-contained lead-antimony multi-component alloys... from silver-contained lead-antimony multi-component alloys was investigated by vacuum distillation process for the enrichment of silver under the condition of medium vacuum. The effects of distillation......
Novel thermal expansion of lead titanateXING Xianran, DENG Jinxia, CHEN Jun and LIU GuirongDepartment of Physical Chemistry, University of Science & Technology Beijing, Beijing 100083, China摘 要:<正> Lattice parameters of lead titanate were precisely re-determined in the temperature range of -150-950℃ by high precision XRPD measurements......
was more than 60%, which made it possible to enrich Ag by adding Zn into the Sn-Pb-Ag alloy. Key words: Sn-Pb-Ag; Ag-Zn intermetallic compounds; density; stratified region; lead 粗锡火法精炼过程中,大部分锡冶炼厂采用连续螺旋结晶机...进行. 图5 Pb质量分数对Sn-Pb-Ag体系密度的影响 Fig. 5 Density of Sn-Pb-Ag with different mass fraction of lead 6 结论 1) 2组提银实验中浮渣银质量分数分别为0.72%和0.95%,低于加锌前体系上部的银质量分数0.91%和1.15%.加锌后体系中存在铅质量分数为66.67%富铅相......
Batch washing of saturated hydrocarbons and polycyclic aromatic hydrocarbons from crude oil contaminated soils using bio-surfactantZHANG Wen(张文) (Beijing Dingshi Environmental Engineering Co., Ltd... to the changes of pH and salinity and different bio-surfactant concentrations were investigated. In general, compared with the experiments without bio-surfactant addition, adding rhamnolipid to crude oil-water......
Article ID: 1003-6326(2005)05-1138-07 Sulphidization flotation for recovery of lead and zinc from oxide-sulfide ores FA Keqing1, Jan D.Miller1, JIANG Tao(姜 涛)2, LI Guang-hui(李光辉)2 (1...) Abstract: A new flowsheet was developed to recover the valuable minerals from oxide or oxide-sulfide ores of lead and zinc. The flowsheet consisted of flotation of sulfide minerals, desliming......
Large Photosensitivity in Lead Silicate Glasses X-C.Long1,S.R.J.Brueck1 (1.Center for High Technology Materials, University of New Mexico, Albuquerque, NM 87106) 摘要:A large photoinduced refractive index change (△n = 0.21 ± 0.04 ) is obtained in leadsilicate glasses by irradiation with the frequency quadrupoled output of a Q-switched YAG laser (266nm). [全文内容正在添加中] ......
Trans. Nonferrous Met. Soc. China 24(2014) 1202-1209 Effect of copper, sulfur, arsenic and antimony on silver distribution in phases of lead blast furnace J. CHAIDEZ-FELIX1, A. ROMERO-SERRANO1.... Echeverria, Torreon, C.P. 27300 Coahuila, Mexico Received 9 August 2013; accepted 17 November 2013 Abstract: An experimental study was carried out to estimate the effect of the lead impurities......
Lead desorption from modified spent grain LI Qing-zhu(李青竹), CHAI Li-yuan(柴立元), ZHAO Jing(赵 静), YANG Zhi-hui(杨志辉), WANG Qing-wei(王庆伟) School of Metallurgical Science and Engineering...; Abstract: Lead-loaded modified spent grain regenerated by desorption process was investigated. HCl, H2SO4, H3PO4, NaOH......
