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hydrochloric acid was investigated. Leaching kinetics, such as apparent reaction rate, activation energy and reaction order, were determined using the shrinking-core model and the Arrhenius equation..., and the apparent reaction rate(kap) of leaching was accelerated as well. For inactivated waste phosphors, the apparent activation energy(Eap) was 52.82±3.95 kJ/mol, indicating that the rate-controlling step......
hydrochloric acid was investigated. Leaching kinetics, such as apparent reaction rate, activation energy and reaction order, were determined using the shrinking-core model and the Arrhenius equation..., and the apparent reaction rate(kap) of leaching was accelerated as well. For inactivated waste phosphors, the apparent activation energy(Eap) was 52.82±3.95 kJ/mol, indicating that the rate-controlling step......
for the leaching process is established, and the apparent activation energy is 11.611 kJ/mol. The leaching process of clay mineral could be simulated with a shrinking core model, which indicates... and sulfuric acid concentration. Key words: clay vanadium mineral; leaching kinetics; shrinking core model; activation energy ......
and pyrite. The vanadium oxidation reaction is controlled by diffusion kinetics and the apparent activation energy is 347.00 kJ /mol. As the roasting temperature increases, the leaching rate of vanadium..., the technique has the characteristics of high leaching rate and more environment safety. Key words: vanadium; high-carbon stone coal; fluidized oxidizing roasting; activation energy 我国钒资源主要赋存在石煤中,其储量巨大,占我国......
and copper activation processes of sphalerite. 2 Computational methods and model Calculations have been done using Cambridge Serial Total Energy Package (CASTEP) developed by PAYNE et al[8], which... Quantum-mechanical study of effect of lattice defects on surface properties and copper activation of sphalerite surface CHEN Jian-hua(陈建华)1, CHEN Ye(陈 晔)2, LI Yu-qiong(李玉琼)2 1. College......
on chromite ore particle size decrease and the lattice distortion. The formation of aggregation weakens the strengthening effect of mechanical activation for releasing high surface energy. Key words... 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......
is between 600-700 ℃. The apparent activation energy E and pre-exponential factor A were calculated by Kissinger and Ozawa-Doyle methods, and the values are 259.23 kJ/mol and 1×1014.67, respectively.... Key words: gold-bearing sulfide; pyrite; thermal decomposition; kinetics; thermogravimetric analysis; activation energy 矿石中金呈细粒或次显微粒状被包裹或浸染于硫化物黄铁矿中,这种被包裹的金用细磨方法也很难解离,金不能与浸出试剂有效接触,导致金的浸出率降低,通常采用氧化焙烧法消除黄铁......
: 145-151. [18] GUILLAUME B G, CHRISTIAN G. Apparent activation energy for the densification of a commercially available granulated zirconia powder[J]. J Am Ceram Soc, 2007, 90: 1246-1250. [19] LEE W...; nanometer powder; sintering; kinetics; activation energy 钼是一种难熔金属,具有强度和硬度高,抗腐蚀,导热导电性能好的特点[1].在钼基体上加入耐高温的Al2O3陶瓷硬质颗粒制得的Al2O3/Mo复合材料,综合了钼基体和Al2O3增强相各自的优点,可作为高温耐磨结构材料使用[2-4].目前,大多数钼基合金产品采用粉末冶金工艺生产,即通过机械压制和后序......
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Nanocrystalline Growth Activation Energy of Zirconia Polymorphs Synthesized by Mechanochemical TechniqueJafar Javadpour2,Alireza Khav2,Massoud Goodarzi2,Hamid Reza Rezaie22. School of Metallurgy... of ZrO2 was less than 100 nm up to around1100 ℃.The activation energy for ZrO2 nanocrystallite growth during calcination was calculated to be about13,715 and 27,333 J/mol for tetragonal(t-ZrO2......
