贵州某铜尾矿铜金回收浮选试验研究

发布时间：2018-08-16 17:38

【摘要】：以贵州某铜尾矿为研究对象,该地区铜尾矿中富含铜、金金属。针对尾矿成分复杂,嵌布粒度细等特点进行可选性试验,选择适宜的工艺流程和药剂制度,获得满足工业品级的铜精矿。通过工艺矿物学分析鉴定,铜主要以硫化铜的形式存在,金主要以裸露金的形式存在,含铜0.31%,含金0.46g/t；脉石矿物主要有石英、角闪石、方解石、石榴石、透辉石、绿泥石等。黄铜矿与黄铁矿、磁黄铁矿等共生关系密切,呈细粒、微细粒不均匀嵌布,部分粒度极细,难以单体解离。根据该含金铜尾矿实际特点,进行了磨矿细度试验、捕收剂种类和用量试验、活化剂试验、pH调整剂试验、起泡剂种类和用量试验、CaO用量试验等条件试验,确定适宜的药剂制度,并制定了“铜金硫混浮—混合精矿再磨—铜硫分离”的原则工艺流程。研究表明,在磨矿细度为-0.074mm占80%的情况下采用1粗2精2扫、混合精矿再磨至-0.038mm占82.14%,铜硫分离后3次精选、1次扫选中矿顺序返回流程处理该试样,最终获得铜金精矿含铜14.59%、铜回收率为56.01%,含金19.29g/t、金回收率为51.01%；硫精矿含硫39.74%、硫的回收率为60.77%,含金0.74g/t、金回收率为20.21%的良好指标,对尾矿综合利用有借鉴意义。
[Abstract]:The copper tailings in Guizhou province are rich in copper and gold. According to the characteristics of complex tailing composition and fine grain size, the suitable technological process and medicament system were selected to obtain copper concentrate to meet the industrial grade. Through process mineralogical analysis, copper mainly exists in the form of copper sulphide, gold in the form of exposed gold, copper 0.31 and gold 0.46 g / t; gangue minerals mainly include quartz, hornblende, calcite, garnet, diopside, chlorite, etc. Chalcopyrite has close symbiotic relationship with pyrite and pyrrhotite. According to the actual characteristics of the gold-bearing copper tailings, the grinding fineness test, the collector type and dosage test, the activator test and pH adjuster test, the foaming agent type and dosage test and Cao dosage test were carried out to determine the appropriate reagent system. The principle of "copper-gold-sulfur flotation-mixed concentrate regrinding-copper-sulfur separation" was established. The results show that when the fineness of grinding is -0.074 mm and 80%, the sample is treated by the process of regrinding the mixed concentrate to -0.038 mm and returning the ore back to the first time after the separation of copper and sulfur. Finally, the copper concentrate contains 14.59% copper, the copper recovery is 56.01%, the gold recovery is 19.29 g / t, the gold recovery is 51.01.The sulfur concentrate contains 39.74% sulfur, the sulfur recovery is 60.77%, the gold recovery rate is 20.21% and the recovery rate is 0.74 g / t, which is useful for the comprehensive utilization of tailings.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD923

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