【摘要】 研究了OH^-和Sb³⁺-OH^-体系中锌粉置换锡的反应动力学。结果表明:在Sb³⁺-OH^-体系中,Sb³⁺的析氢副反应产生较多气泡,分散了锌粉与产物锡,促使锌粉置换锡反应速率加快,反应时间缩短,产物锡颗粒更分散:OH^-体系中,锌粉置换锡反应由内扩散控制;Sb³⁺-OH^-体系中,锌粉置换锡反应由化学反应控制。更多还原

【Abstract】 Recovery of stannum from alkaline solution by replacement using zinc powder in OH^- and Sb³⁺-OH^-systems was studied.The results show that in Sb³⁺-OH^- system,with increasing of air bubble produced by Sb³⁺ hydrogen evolution secondary reaction,replacement reaction is accelerated,reaction time is shortened,and stannum particles are more dispersed.Reaction of replacement stannum by Zn is controlled by internal diffusion in OH^- system while is controlled by chemical reaction in Sb³⁺-OH^- system.更多还原