摘要
针对湖南某铅锌矿浮选铅锌后剩余的硫精矿进行了提取金的试验研究。通过采用同步热分析仪确定了难处理含金硫精矿焙烧氧化的最佳条件,采用扫描电镜和能谱仪分析含金硫精矿和焙砂表面形态及主要元素的变化。考察初始碘浓度,碘和碘化物摩尔分数比,反应时间和液固比对碘化法浸出过程中金浸出率的影响。研究结果表明,马弗炉焙烧氧化的最佳条件为:在700℃温度下焙烧2 h后的难处理含金硫精矿。当碘的质量分数为1.0%,n(I2)∶n(I-)=1∶10,浸出时间为4 h,液固比为4∶1时,金浸出率可达78.78%。
Gold leaching experiments were carried out on the left sulfur concentrate which was obtained by flotation in a lead and zinc mine of Hunan. The best condition of roasting oxidizing on refractory gold-bearing sulfur concentrate was studied with synchronous thermal analyzer. Besides,the surface morphology and the changes of main elements in raw ore and roasted ore were analyzed by scanning electron microscopy and energy spectrometer analysis. Effects of initial iodine content,iodine and iodide mol ratio,reaction time and liquid-solid ratio on leaching rates of Au during iodine leaching process were investigated. The results showed that the optimum roasting oxidizing was achieved in the muffle at 700℃ in two hours. The leaching rates of Au would reached 78. 78% when initial iodine content of 1%,iodine and iodide mole ratio of 1∶ 10,reaction time of 4 h and liquid-solid ratio of 4∶ 1.
出处
《矿业研究与开发》
CAS
北大核心
2015年第2期47-51,共5页
Mining Research and Development
基金
湖南省自然科学省市联合基金项目(12JJ8008)
关键词
金
焙烧氧化
碘化法浸出
难处理含金硫精矿
Gold,Roasting oxidation,Iodine leaching,Refractory gold-bearing sulfur concentrate
