金属学报  1988, Vol. 24 Issue (1): 119-122

论文 本期目录 | 过刊浏览 |

PbS与PbO及硅酸铅反应的动力学和PbO的活度

陆跃华;刘纯鹏

昆明工学院冶金系;昆明工学院冶金系

KINETICS OF INTERACTION OF PbO, xPbO·SiO_2 WITH PbS AND ACTIVITY OF PbO

LIU Chunpeng Kunming College of Engineering LU Yuehua Post Graduate Student for Ph.D.;Department of Metallurgicel;Kunming Institute of Technology

陆跃华;刘纯鹏. PbS与PbO及硅酸铅反应的动力学和PbO的活度[J]. 金属学报, 1988, 24(1): 119-122.
, . KINETICS OF INTERACTION OF PbO, xPbO·SiO_2 WITH PbS AND ACTIVITY OF PbO[J]. Acta Metall Sin, 1988, 24(1): 119-122.

摘要 参考文献 相关文章 Metrics 全文: PDF(330 KB)   摘要: <正> 为了阐明QSL法直接炼Pb的化学反应动力学,研究PbS与PbO及xPbO·SiO_2的交互作用是具有实际意义的。为了避免高温造成PbS和PbO的挥发损失,在较低温度下研究该体系的交互反应动力学,对探索火法炼Pb新工艺具有一定价值。 试料是分析纯PbO,PbS和合成的纯xPbO·SiO_2,试料粒度均为100—120 mesh,在配比试样中以PbO:PbS=2:1作基础并混匀,以便保证按化学计量反应产生SO_2。装有试料的刚玉坩埚在密封竖直刚玉管底部低温区用Ar气保护升温加热,待达到预期温度后,坩埚由密封系统中的活动撑杆推到高温区并同时用Ar气载流使产生的SO_2连续为碘量法所测 关键词 ： 固—液界面反应,  化学控制,  扩散控制,  PbO的活度     Abstract：The rate equation for the reaction of PbO with PbS in liquidstate at 850--1000℃ has been determined as dα/dt=4.73×10~6 exp (-190/RT)in which the activation en ergy E=190kJ/mol. In the solid-liquid reaction system of xPbO. SiO_2-PbS, the rate equation maybe formulated as following: dF(α)/dt=k′(t<20min)+k"(t>20min) (1000℃)where F(α)=α-(N°_(SiO_2/N°_(PbO))ln(1-α) The activities of PbO and SiO_2 in the silicate calculated from the rate dataare in good agreement with those measured thermodynamically. Key words： solid-liquid interfacial reaction    chemical control    diffusion control    activity of PbO 收稿日期: 1988-01-18      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 陆跃华 刘纯鹏 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1988/V24/I1/119 1 #12 2 Shohu H Y,Wodsworth M E.郑蒂基译. 提取冶金速过程,北京:冶金工业出版社,1984:153 3 李振家,芦爱春,孙萼庭.全国第一届冶金过程物理化学学术论文集,上海科学技术出版社,1962:380 4 Liou Chunpen, Feng Ganming, Yan Chuanyi, Ho Aiping, First China-USA Bilateral Mctallurgical Conference, Beijing, 1981: 137 5 Richardson F D. WebbL E. Bull Inst Met. 1955; 64: 529 6 Kozuka Z, Samis C S. Met Trans, 1970; 1: 8717 [1] 王蕾,唐荻,宋勇. 扩散过程控制下的奥氏体连续冷却转变*[J]. 金属学报, 2015, 51(11): 1341-1348. [2] 王狂飞; 李邦盛; 米国发; 郭景杰; 傅恒志 . Ti44Al合金胞/枝晶转变及其生长过程的数值模拟[J]. 金属学报, 2007, 43(2): 211-216 . [3] 董振富;卢柯;刘学东;丁炳哲;魏文铎;王景唐. 非晶态Fe_(80)B_(20)合金的表观晶化动力学研究[J]. 金属学报, 1994, 30(17): 218-222. [4] 方鸿生;王家军. 贝氏体相变理论新进展及学术分歧[J]. 金属学报, 1994, 30(11): 481-490. Viewed Full text Abstract Cited   Shared      Discussed