方铅矿的直接还原研究

金属学报

1991, Vol. 27

Issue (5): 136-140

论文

本期目录 | 过刊浏览

方铅矿的直接还原研究

刘中华;刘纯鹏

昆明工学院;讲师;昆明工学院

DIRECT HYDROGEN REDUCTION OF GALENA AT MODERATE TEMPERATURE

LIU Zhonghua;LIU Chunpeng Kunming Institute of Technology

引用本文:

刘中华;刘纯鹏. 方铅矿的直接还原研究[J]. 金属学报, 1991, 27(5): 136-140.
, . DIRECT HYDROGEN REDUCTION OF GALENA AT MODERATE TEMPERATURE[J]. Acta Metall Sin, 1991, 27(5): 136-140.

全文: PDF(637 KB)

摘要: 在873—973K的温度范围内研究了方铅矿的氢还原反应·结果表明,反应比较彻底,其规律可用在化学控制区的收缩核模型描述.还原反应为氢浓度的一级反应,活化能为79.0kJ/mol.试样的SEM二次电子图象表明,因液态 Pb与固态方铅矿间的界面张力很大,反应过程中在方铅矿表面难以形成Pb的液膜。

关键词 ：气-固反应, 方铅矿, 直接还原

Abstract：The direct reduction of galena with hydrogen at 873-973 K could be described by the shrinking core model in the chemical control region. The reaction was revealed to be of first order with respeot to hydrogen concentration and the activation energy is 79.0 kJ/mol. Because of the fairly large interface tension between the solid galena and the liquid Pb, the SEM second electron images showed that the liquid Pb film is difficult to be formed on the unreacted galena surface in reaction process.

Key words： gas-solid reaction galena direct reduction

收稿日期: 1991-05-18

	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
	刘中华
	刘纯鹏
44.8K

链接本文:

https://www.ams.org.cn/CN/ 或 https://www.ams.org.cn/CN/Y1991/V27/I5/136

1 Liu Zhonghua, Liu Chunpeng, Xu Yousheng. Chin J Met Sci Technol, 1988; 4: 368
2 Szekely J, Evans J W. Sohn H Y. Gas-Solid Reactions. New York: Academic. 1976: 68
3 林传仙,白正华,张哲儒.矿物及有关化合物热力学数据手册.北京:科学出版社,1985:14
4 Davey T R A, Willis G M. J Met, 1977; 29(3) : 24
5 Smithells C J. Metals Reference Book, Vol. Ⅱ, 3rd ed, London: Butterworths, 1962: 571
6 Richardson F D. Physical Chemistry of Melts in Metallurgy. Vol. Ⅰ, London: Academic, 1974: 28

[1]	金永丽,于海,张捷宇,赵增武. 磁场对含CaO铁氧化物还原的影响[J]. 金属学报, 2019, 55(3): 410-416.
[2]	黄典冰; 杨天钧 . 炼铁过程操作线图[J]. 金属学报, 2000, 36(2): 145-149 .
[3]	周寿增;于申军;张茂才;王润;林国标;尹有祥;林毅. 气-固相反应法制备Sm_2Fe_(17)N_y永磁合金过程中氮原子的扩散[J]. 金属学报, 1996, 32(8): 877-883.

Viewed

Full text

Abstract

Cited

Shared

Discussed