焙烧温度对高岭石与硫代硫酸金相互作用的影响
投稿时间:2019-04-26  修订日期:2019-08-29  点此下载全文
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作者单位E-mail
刘淑杰 辽宁科技大学矿业工程学院 18341263876@163.com 
代淑娟 辽宁科技大学矿业工程学院 shujuandai@163.com 
李鹏程 辽宁科技大学矿业工程学院  
苏馨 辽宁科技大学矿业工程学院  
基金项目:国家自然科学(编号51574146)。
中文摘要:金在火法冶炼中的高温活化作用下,可能与高岭石等硅酸盐类矿物相互作用,导致金回收难度增大,因此,探索焙烧下金与高岭石相互作用很有意义。将室温高岭石及不同焙烧温度下的高岭石焙渣分别与硫代硫酸金充分混合进行搅拌试验,结合红外和X射线衍射对高岭石与硫代硫酸金相互作用进行机理探讨。在矿浆浓度28.57%、初始金浓度85 mg.L-1、搅拌转数500 r.min-1及搅拌时间30min条件下,得出高岭石与硫代硫酸金吸附能力强。与室温搅拌相比,焙烧活化了高岭石,增强了高岭石对硫代硫酸金的吸附效果。经700℃焙烧后的焙渣对硫代硫酸金的吸附量急剧增加,表明该温度下的焙渣对硫代硫酸金的吸附能力强。
中文关键词:高岭石  硫代硫酸金  焙烧  吸附
 
Effect of calcination temperature on the interaction between kaolinite and gold thiosulfate
Abstract:Under the action of high temperature activation in pyrometallurgical processes, gold likely interacts with silicate minerals such as kaolinite, which makes gold recovery more difficult. Therefore, it is of great significance to explore the interaction between gold and kaolinite under calcination. Room temperature Kaolinite and the kaolinite slag at different temperatures was fully mixed with gold thiosulfate for stirring tests. The mechanism of interaction between kaolinite and gold thiosulfate was discussed by combining infrared and X-ray diffraction. At pulp concentration of 28.57%, initial gold concentration of 85 mg.L-1, stirring speed of 500 r.min-1, and stirring time of 30 min, which proved that kaolinite has strong adsorption capacity for gold thiosulfate. Compared with stirring at room temperature, roasting activated kaolinite enhances the adsorption of activated kaolinite for gold thiosulfate. The amount of gold thiosulfate adsorbed on the roasted slag increased sharply after calcination at 700℃, indicating that the roasted slag at this temperature has a strong adsorption capacity for gold thiosulfate.
keywords:Kaolinite  Gold thiosulfate  Calcination  Adsorption
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