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and water were made. The leaching experiment was carried out to explore the evolution rules of the concentration of the leaching solution. The leaching mechanism of salt and kinetics of the multi-phase...: solution mining; salt rock; kinetic model; leaching rate 近几年来,我国西部发现多个大型砂岩型矿床,低品位砂岩型矿床一般不利于传统方法的开采,而溶浸开采凭借着其工艺简单,成本低,环境友好,资源节约等优势,可将其合理经济回收.溶浸技术在资源的安全高效开采中具有广阔的应用前景,目前,世界上采用溶浸法生产的铜金属占总产量的20%,约20%左右的铀......
: Kinetic analysis of Ti-Al reaction was conducted through differential scanning calorimetry (DSC), and mechanism of the preparation of titanium aluminides was elucidated. The results show...;Kissinger法;Friedman法 中图分类号:TG146.2 文献标志码:A Kinetic analysis and control action of titanium and aluminium QU Hai-tao1,2, REN Xue-ping1, HOU Hong-liang2, ZHAO Bing2 (1. School......
Development mechanism of internal local corrosion of X80 pipeline steelZhuowei Tan1,Liuyang Yang2,Dalei Zhang2,Zhenbo Wang1,Frank Cheng3,Mingyang Zhang4,Youhai Jin11. China University of Petroleum...="ChDivSummary" name="ChDivSummary">The occurrence and development mechanism of internal local corrosion has always been a controversial topic, and especially under flow conditions. In this paper......
Trans. Nonferrous Met. Soc. China 27(2017) 2691-2703 Enhancing recovery of uranium column bioleaching by process optimization and kinetic modeling H. ZARE TAVAKOLI1, M. ABDOLLAHY1, S. J. AHMADI2... on the surface of minerals. By using optimal conditions, uranium bioleaching recovery is increased at column and jarosite precipitation is minimized. The kinetic model showed that uranium recovery has......
of kinetic data suggests a mixed control reaction mechanism [7]. 3.2 Leaching studies 3.2.1 Effect of H2SO4 concentration The effect of H2SO4 concentration (3-9 mol/L) on the dissolution of kaolin sample.... From the Arrhenius relation in Fig. 9, the calculated activation energy is 21.60 kJ/mol. To establish the reaction mechanism for the process, linearization of the kinetic curve for effect of particle......
on the research above, the regularity of the phase transformation and the oxidizing kinetic equations of iron in the oxidizing process were studied in this work. Enrichment and crystal growth mechanism of magnetite...Oxidization mechanism in CaO-FeOx-SiO2 slag with high iron content ZHANG Lin-nan(张林楠), ZHANG Li(张 力), WANG Ming-yu(王明玉), SUI Zhi-tong(隋智通) (School of Materials and Metallurgy, Northeastern......
as the kinetics proceeds parabolically. The change of the oxidation kinetics law is caused by tiny zinc particles formed in zinc vapor. The relative kinetic model functions and kinetics parameters of the title reaction were deduced from kinetic theories and the experimental data. The oxidation mechanism of the tiny zinc particles were investigated and the diffusion coefficient of Zn atoms through......
曲线1在随后超过曲线2,如图5(d)所示.由以上分析可知,在高温段(450 ℃,500 ℃)等温退火时,大的冷轧变形量导致位错等缺陷密度增高,析出形核位置增加,孕育期缩短,从而促进析出过程的进行;但同样会促进再结晶的快速完成,基体中新的无畸变组织反而对随后的析出过程产生了抑制作用. 图5 JMAK方程拟合的等温析出动力学曲线 Fig. 5 Fitting kinetic...贵清. 3003铝合金热变形机制及其加工图[J]. 材料热处理学报, 2013, 34(2): 114-119. FU Gao-sheng, CHEN Gui-qing. Hot deformation mechanism and processing maps of 3003 aluminum alloy[J]. Transactions of Materials and Heat......
kinetic 碳/碳(C/C)复合材料具有密度小,热膨胀系数低,模量高,耐腐蚀,耐磨损和吸震性能好等优异性能,因此,C/C复合材料是最有发展前景的高技术新材料之一,已在航空和航天等高温领域得到广泛应用[1].但是,C/C复合材料在温度超过500 ℃的氧化气氛下迅速氧化使得其力学性能明显降低,从而限制其在很多领域的应用[2],因此,近年来C/C复合材料的氧化防护问题成为研究热点之一.涂层技术是解决C.../Carbon composites and resultant oxidation kinetics and mechanism[J]. Journal of Materials Science & Technology, 2010, 26(11): 1021-1026. [5] FU Qiangang, LI Hejun, LI Kezhi, et a1. SiC whisker......
. 含砷钴镍渣中砷碱介质氧化浸出机理[J]. 过程工程学报, 2013, 10(6): 939-945. YU Guo-lin, ZHANG Ying, ZHENG Shi-li. Oxidation leaching mechanism of arsenic-alkali in residue containing arsenic, cobalt and nickel[J]. Chinese.... The technology avoids the generation of highly toxic AsH3 and has practical significance for the comprehensive utilization of arsenic resources. Key words: alkaline leaching; arsenic; kinetic study; cobalt......