文献类型：期刊文献

中文题名：含金矿物的氰化浸取动力学

英文题名：Leaching Kinetics of Gold Ores by Cyanidation

作者：傅建顺[1];周展云[1]

机构：[1]华东化工学院化学工程研究所

年份：1990

卷号：16

期号：2

起止页码：145

中文期刊名：华东化工学院学报

收录：国家哲学社会科学学术期刊数据库;Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：金矿物;浸取;氰化;硝基苯磺酸钠;金

外文关键词：cyanidation; gold; additive agents; leaching kinetics; gold ores; sodium m-nitrobenzene sulfonate

摘要：筛选了一种能强化金浸取反应速率的添加剂——间硝基苯磺酸钠(MS),并进行了浸取反应过程的动力学研究。讨论了MS和氰化钠浓度、温度、搅拌强度及矿物粒度等因素对浸取反应的影响。MS通过改变阴极反应体系强化了金的氰化浸取反应速率,且对浸取液中氰化物无破坏作用。采用收缩未反应芯模型较好地描述了金的浸取过程,金浸取的动力学过程受扩散控制。同时导出了宏观动力学方程。用黄铁矿焙渣在串联式池浸装置中进行工业化模拟试验的结果表明,含MS的浸取液,浸取金含量仅为0.94g/t的矿渣,具有较力满意的结果。
It is found that sodium m-nitrobenzene sulfonate (MS) as an additive can enhance the leaching rate of gold by changing the cathode reaction mechanism without destroying cyanide in leaching solution. The leaching kinetics is studied. The effects of the concentrations of cyanide and the additive, temperature, agitation rate and ore granule size on the leaching reaction are discussed. The Shrinking Core Model can be applied to describe the leaching process. It is concluded that the whole process is controlled by the diffusion of the reactants. An empirical equation for the leaching rate correlation is established. A similating test has been carried out using pyrite cinder in a cascade pond leaching set-up. Experimental results show that MS additive in small amounts can enhance the gold leaching rate, especially in case of low grade gold ores.