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of ironmaking processes to produce direct reduced iron (DRI) [22]. For instance, processes like FASTMET, FASTMELT and Itmk3 have been commercialized, which involve the direct reduction of composite... of reactions. It involves the direct reduction of iron oxides (Eq. (6)) as long as the internal carbon, generating the CO gas, which is in close contact with the ilmenite grains. This CO gas reduces......
H2O and CO, which reduces the reduction rate of CH4. Key words: methane; direct reduction; pellets; carburization; microstructure Energiron-ZR是目前较为先进的直接还原工艺,可直接使用天然气,煤制气和焦炉煤气.但未经重整的还原气中甲烷含量很高,故在竖炉的入口处...向固溶体颗粒内的进一步扩散,致使碳在球团颗粒之间及表面逐步沉积;反应30 min时金属化颗粒中碳含量由边缘至中心逐渐降低,说明吸附碳可由金属铁颗粒的外部向中心扩散,并与金属铁生成铁碳固溶体,可有效降低海绵铁的再氧化. 参考文献: [1] VOLPATTI A, FRANCO B, MARTINIS A. Energiron direct reduction process......
Preparation of high active Pt/C cathode electrocatalyst for direct methanol fuel cell by citrate-stabilized method JIANG Qing-lai1, PENG Zhong-dong1, XIE Xiao-feng2, DU Ke1, HU Guo-rong1, LIU..., China Received 19 January 2010; accepted 3 March 2010 Abstract: Platinum nanoparticles supported on carbons (Pt/C, 60%, mass fraction) electrocatalysts for direct methanol fuel cell (DMFC) were......
Dynamic self-adaptive ANP algorithm and its application to electric field simulation of aluminum reduction cellWANG Ya-lin(王雅琳), CHEN Dong-dong(陈冬冬), CHEN Xiao-fang(陈晓方), CAI Guo-min(蔡国民), YANG Chun... (FEM) has been given. By taking the electric field of aluminum reduction cell (ARC) as the research object, the performance of two classical RP methods, which are Al-NASRA and NGUYEN partition (ANP......
段磨矿-磁选流程,可同时获得含铁90.80%的金属铁粉和含铁65%的铁精矿,铁的总回收率为81.19%.由此证明煤泥是一种还原效果优良的浸锌渣还原剂. 关键词:煤泥;还原剂;浸锌渣;直接还原;有价金属 中图分类号:TD981;TF09 文献标志码:A Direct reduction effect of coal slime on zinc..., China) Abstract: The effects of technical parameters, such as the mass ratio of coal slim to zinc-leaching residue, the mole ratio of CaO to SiO2, reduction temperature and time, on the direct......
comparing with Virk’s phenomenology. The mean velocity and Reynolds stress profiles are consistent with the experimental and direct numerical simulation results. A drag reduction level of 45... by the increased viscosity, and then the drag reduction occurs. The behaviors of stresses are consistent with the experimental observations[11] and direct numerical simulation results[12-14]. 5 Conclusions......
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钒钛铁精矿内配碳球团的高温快速还原刘松利1,2,白晨光1,胡途2,吕学伟2,邱贵宝2(1.重庆市重庆大学材料科学与工程学院2.四川省攀枝花市攀枝花学院 材料工程学院)摘 要:钒钛铁精矿是一种铁,钒,钛等多元素共生的复合矿,具有很高的综合利用价值.采用实验室转底炉对钒钛铁精矿内配碳球团进行了高温快速还原的可行性研究,通过正交试验考察了配碳比,还原温度,添加剂,还原时间等参数对球团金属化率的影响.结果表明:配碳比1.5∶1,还原温度1 350℃,添加剂2%碳酸钠,还原时间20min时金属化率可以达到88%以上.对原......