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Effect of mechanical activation on alkali leaching of chromite ore ZHANG Yang(张 洋)1, 2, ZHENG Shi-li(郑诗礼)1, DU Hao(杜 浩)1, XU Hong-bin(徐红彬)1, ZHANG Yi(张 懿)1 1. National Engineering Laboratory.... It is observed that the extraction ratio reaches 97% after leaching for 200 min when chromite ore is mechanically activated for 10 min, but only 34% if not activated. Mechanical activation can decrease......
pH for uranium adsorption on immobilizing Aspergillus niger activated carbon 当pH值为2时,微球对铀的吸附量较小, 这可能是由于此时大部分铀水解离子以UO22+形式存在,不易发生水解反应,并且溶液中存在大量的氢离子和铀酰离子竞争固定化黑曲霉活性炭微球表面的活性位点,从而微球表面被质子化,微球表面与铀酰离子之间只形成弱的... Effect of initial uranium concentration for uranium adsorption on immobilizing Aspergillus niger activated carbon 由图2可见,吸附量随着铀浓度的增加而增大,这是因为初始铀浓度较低时,吸附位点与铀水解离子间的浓度梯度的驱动力较小,铀水解离子难以扩散至吸附剂表面,故其吸附量比较小；随......
角度不整合接触界面构成.丁家山铅锌矿属挤压构造成矿系统(大类)下属的与燕山期花岗质岩浆有关的接触交代成矿系统类. 关键词:成矿系统；成矿作用；接触交代变质；丁家山铅锌矿 中图分类号:P61 文献标志码:A Metallogenic system analysis of Dingjiashan Pb-Zn ore district..., such as metallogenic epoch, ore-forming materials source, pass way of ore-forming fluid and site of ore body, it is found that the metallogenesis of Dingjiashan Pb-Zn ore district is contact metasomatic......
Studies on Sulfating Roasting Process for Mianning Bastnasite and Baotou Mixed RE Concentrate Ore Miao Guangli1 (1.Gansu Rare Earth Company, Baiyin 730922, China) Abstract:Some processes of sulfating roasting and water leaching of crude Mianning RE concentrate ore, of fine Mianning RE concentrate ore, of Baotou RE concentrate ore and of their mixture were investigated.The result shows......
J. Cent. South Univ. (2012) 19: 2291-2296 DOI: 10.1007/s11771-012-1274-0 Action rules of H2 and CO in gas-based direct reduction of iron ore pellets YI Ling-yun(易凌云)1, HUANG Zhu-cheng(黄柱成)1, PENG Hu... University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: The gas-based direct reduction of iron ore pellets was carried out by simulating the typical gas composition in coal gasification......
Magnetizing Roasting Mechanism and Effective Ore Dressing Process for Oolitic Hematite Ore余永富College of Resources and Environment al Engineering,Wuhan University of Technology摘 要:Magnetizing roasting of oolitic hematite ore from western Hubei Province was investigated.The mechanism for reduction roasting of oolitic hematite ore was discussed......
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J. Cent. South Univ. Technol. (2009) 16: 0043-0048 DOI: 10.1007/s11771-009-0007-5 Carburization of ferrochromium metals in chromium ore fines containing coal during voluminal reduction by microwave...; Abstract: Chromium ore fines containing coal (COFCC) can be rapidly heated by microwave to conduct the voluminal......
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Crystal structure and thermal expansion of perovskites containing uranium(VI) and rare-earth elementsAleksandr Knyazev,Anna Ershova,Nikolai Chernorukov摘 要:By the method of high-temperature reactions in solid phase, compounds with the general formula MII(AⅢ2/3U1/3)O3(MII=Sr, AⅢ=Sc, In;MII=Ba, AⅢ=Sc, In, Y, Nd-Lu) were synthesized.Their structures(space......
