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Decomposition reaction kinetics of Baotou RE concentrate with concentrated sulfuric acid at low temperatureWANG Xiuyana, LIU Jiemina, LI Meib, FAN Huilia, and YANG Qishana a Department of Chemistry...-DTA) and chemical analytical methods were used to study the thermal decomposition process and the thermal decomposition effect.The Freeman-Carroll method was applied to analyze the TG-DTA curves.The......
Thermodynamic analysis on sodium carbonate decomposition of calcium molybdenum XIA Wen-tang(夏文堂), ZHAO Zhong-wei(赵中伟), LI Hong-gui(李洪桂) School of Metallurgical Science and Engineering, Central...: calcium molybdenum(CaMoO4); sodium carbonate; decomposition; thermodynamic analysis; concentration logarithm diagram  ......
Hydrothermal Synthesis of V-Cr-Al-O Nanospheres and Their Effect on Decomposition of Ammonium Perchlorate李雄建33. College of Chemistry and Chemical Engineering, Hubei Normal University摘 要:decomposition of AP was investigated by the thermogravimetric analysis and differential thermal analysis(TG/DTA......
; Abstract: The decomposition reactions of monazite and bastnaesite mixed rare earth minerals... of 425-540 ℃, and the main reactions are bastnaesite decomposition, i.e. REOF reacts with CaO to produce RE2O3 and CaF2, and Ce2O3 is oxidized to CeO2. During this step, CaCO3 is formed at about......
decomposition 2 工艺流程及原理 2.1 工艺流程 铁矾渣热酸分解及硫脲提银的原则流程如图3所示. 图3 铁矾渣热酸分解及硫脲提银的原则流程图 Fig. 3 Principle flow sheet of decomposition of jarosite residue in sulfuric acid medium... ratio on leaching rate of Fe, Zn and Ag 表2 浸出渣混合后的化学组成/% Table 2 Chemical composition of decomposition residue (mass fraction, %) 表3 铁矾渣热酸分解过程中主要金属元素平衡 Table 3 Metal balance......
Decomposition mechanism of chromite in sulfuric acid–dichromic acid solutionQing Zhao1,2,Cheng-jun Liu1,2,Bao-kuan Li2,Mao-fa Jiang1,21. Key Laboratory for Ecological Metallurgy of Multimetallic Ores... as a promising, cleaner method to prepare trivalent chromium products from chromite; however, the decomposition mechanism of the ore is poorly understood. In this work, binary spinels of Mg–Al, Mg–Fe, and Mg–Cr......
(a)中观察到的一致,说明热激活机制能很好地解释U-5.5Nb合金中晶界处胞状分解组织的演变. 图6 晶界附近胞状分解及其机制 Fig. 6 Cellular decomposition and mechanisms of U-5.5Nb alloy at grain boundary 为进一步验证热激活机制在U-5.5Nb合金中的可行性,根据FOURNELLE和CLARK提出... of cellular decomposition surrounding Nb2C inclusion 图8 图示说明夹杂物界面处组织转变机理[27] Fig. 8 Schematic diagram of microstructure evolution mechanism at interface of inclusion 随后γ1-2相在连接处发生颈缩(见图8(c......
Study on Roasting Decomposition of Mixed Rare Earth Concentrate in CaO-NaCl-CaCl2吴文远,边雪,孙树臣,涂赣峰摘 要:<正>The decomposed process of bastnaesite, monazite and mixed rare earth concentrate in CaO-CaCl-CaCl2 was studied by means of TG-DTA method. The relationship among decomposition ratio, roasting temperature, and CaO-NaCl addition was studied......
Thermal Decomposition of Leightonite, K2Ca2Cu(SO4)4·2H2O王锦华School of Materials Science and Engineering, Wuhan University of Technology摘 要:The thermal decomposition of Leightonite, K2Ca2Cu (SO4)4·2H2O, was studied by thermal gravimetric analysis(TGA), differential thermal analysis(DTA), X-ray diffraction(XRD), etc. The results show that the Leightonite......
中图分类号:TF 823 文献标识码:A Kinetics analysis of decomposition of ilmenite by KOH sub-molten salt method LIU Yu-min1, QI Tao2, ZHANG Yi2 (1. College of Chemistry and Environmental... in KOH sub-molten salt was investigated. The effects of factors, such as reaction temperature and particle size of the ore, on the decomposition rate of ilmenite were also studied. The results show......