硫脲浸金新进展

NEW RESEARCH PROGRESSES OF GOLD LEACHING IN THIOUREA SOLUTIONS

综述了最有希望取代氰化法浸金的硫脲法近年来的研究进展。酸性硫脲法存在硫脲过多消耗、设备严重腐蚀、溶金没有选择性、以及溶液的再生和净化工序复杂等一系列问题。为克服这些缺点,笔者从硫脲本身的微观结构出发,根据"构效关系"找到了一种能使硫脲在碱性介质中稳定的稳定剂,并对碱性硫脲浸金工艺及其基础理论进行了系统深入的研究,此工艺在含金废料的回收及金矿的浸取中取得了满意的效果,是一条经济合理、简单可行的提金新途径。文中最后指出了碱性硫脲法浸金尚待解决的问题,并展望了其发展前景。

In this papers, the recent research progresses of Gold leaching in thiourea solution, which is the most prospective substitute for dissolving Gold in cyanide solution, were summarized Gold leaching in acidic thiourea solution exist a series of problems, such as higher consumption of thiourea during Gold resolution, serious corrosion of equipments in acidic solution, no selectivity of Gold leaching, complicated regeneration and purify procedures of lixiviums In order to overcome the above disadvantages, in our present work, from the viewpoint of microstructure of thiourea and the molecular mechanics, based on the structure-property relationship between the stability of alkaline thiourea and the structure of thiourea and sodium sulfite, an efficient stable reagent was selected, with which thiourea could exist in alkaline thiourea stably The Gold leaching technics and foundational theory in alkaline thiourea solution were investigated systematically and thoroughly The application of this technics to the recycle of Gold scrap and leaching of Gold ores was very effective, and it is an economical, reasonable, simple, feasible and novel approach to Gold leaching In the end, the underresolving questions of Gold leaching in alkaline thiourea were indicated, and the developing foregrounds were expected