金属学报  1981, Vol. 17 Issue (4): 403-411

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高压氢还原制取镍粉动力学的初步探讨

舒代萱;毛铭华;陈家镛

中国科学院化工冶金研究所;中国科学院化工冶金研究所;中国科学院化工冶金研究所

PRELIMINARY STUDIES ON KINETICS OF HIGH PRESSURE HYDROGEN REDUCTION OF NICKEL ION IN AQUEOUS SOLUTION TO METALLIC NICKEL

by Shu Daixuan; Mao Minghua and Chen Jiayong (Institute of Chemical Metallurgy; Academia Sinica)

舒代萱;毛铭华;陈家镛. 高压氢还原制取镍粉动力学的初步探讨[J]. 金属学报, 1981, 17(4): 403-411.
, , . PRELIMINARY STUDIES ON KINETICS OF HIGH PRESSURE HYDROGEN REDUCTION OF NICKEL ION IN AQUEOUS SOLUTION TO METALLIC NICKEL[J]. Acta Metall Sin, 1981, 17(4): 403-411.

摘要 参考文献 相关文章 Metrics 全文: PDF(608 KB)   摘要: 以Cr~(2+)为生核剂制得的镍粉做晶种,对镍氨溶液的高压氢还原过程进行了研究。各种因素对还原速度的影响表明,反应似在化学动力学区内进行,反应速度与加入的晶种量、氢分压平方根成正比,而在大部分镍还原完成前与镍离子浓度无关。初步认为镍离子的还原反应在晶种表面进行,晶种的作用是活化氢分子和生成金属镍的相变中心。反应可设想以下面步骤进行: 1.H_2(g)(?)H_2(l) (快) 2.H_2(l)(?)2H~* (快) 3.Ni~(2+)(?)(Ni~(?))~* (快) 4.2H~*+(Ni~(2+))~*(?)Ni°+2H~+ (慢) 5.2H~++2NH_3→2NH_4~+ (快) 方程式4为速度的控制步骤。 Abstract：Studies were made on high pressure hydrogen reduction of Ni ammoniacal solution to metallic Ni with fine Ni powder, which was also prepared by hydrogen reduction with Cr~(2+) as nucleating agent, added as solid seed. Results indicate that the reduction was carried out under chemical reaction rate control region. The rate of reduction is proportional to the amount of Ni powder as solid seed added,and to the square root of partial pressure of hydrogen and is not influenced by the concentration of Ni ion in solution up to most of Ni reduced. Both activation of hydrogen molecules and phase transformation of Ni are believed to proceed on the surface of Ni powder added. Reaction can be considered to proceed according to the following scheme with reaction 4 as the rate controlling step:(5) 2H~++2NH_3=2NH_4~+ fast 收稿日期: 1981-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 舒代萱 毛铭华 陈家镛 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1981/V17/I4/403 [1] Evans, D. I. J., Advances in Extractive Metallurgy, IMM, London, 1968, p. 831． [2] Burkin, A. R. and Richardson, F. D., Powder Metall., 10 (1967) , 33． [3] Derry, R., Miner. Sci. Eng., 4 (1972) , No. 4, 3． [4] Schaufelberger, F. A., J. Met., 8(1956) , 695． [5] 舒代萱,毛铭华,陈家镛,全国第一届冶金过程物理化学学术报告会论文集,1965,上海科学技术出版社,p.107． [6] Knacke, O., Pawlek, F. and Sussmuth, E., Z. Erzbergbau Metall. 9 (1956) , No. 12, 566． [7] Sircar, S. C. and Wiles, D. R., Trans. Metall. Soc. AIME, 218 (1960) , 891． [8] Mackiw, V. A., Lin, W. C. and Kunda, W., Trans. Metall. Soc., AIME, 209 (1957) , 786． [9] #12 [10] Needes, C. R. S. and Burkin, A. R., Leaching and Reduction in Hydrometallurgy, Ed. by A. R. Burkin Inst. Min. Metall., London, 1975, p, 91． [11] 坂野武,永野健,寺田富士朗,日本矿冶会誌,75(1959) ,853． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed