安徽抛刀岭金矿工艺矿物学研究

Study on process mineralogy of gold ore from Paodaoling of Anhui Province

通过光学显微镜、化学分析等手段,对安徽抛刀岭金矿石的工艺矿物学特性进行了研究。结果表明:矿石中金、银元素含量较高,但岩矿鉴定中未发现金矿物和银矿物,初步推断金以次显微金存在于矿石中;该矿中有用矿物为黄铁矿、毒砂、闪锌矿和脆硫锑铅矿;脉石矿物主要为白云母-绢云母、石英、黑云母以及长石、高岭土、绿泥石、磷灰石和锆石等;金属矿物浸染粒度皆不均匀,黄铁矿、闪锌矿浸染粒度较粗,易于单体解离;毒砂和脆硫锑铅矿粒度较细,与各金属矿物间交代共生关系密切,不易单体解离;非金属矿物中易泥化矿物含量较高,对浮选会产生不利影响。

The characterization of process mineralogy of the gold ore from Paodaoling of Anhui Province was investigated though optical microscope and chemical analysis. The results showed： although the content of Au and Ag is quite high, gold and silver mineral was not found in the ore, so preliminary inference was that gold existed in the ore by the means of microscopic gold; the valuable minerals in the ore were pyrite, arsenopyrite, sphalerite and jamesonite; the primary gangue minerals were white mica-sericite, quartz, biotite, feldspar, kaolinite, chlorite, zircon and apatite; the dissemination size of metallic minerals were unevenly distributed, pyrite and sphalerite had coarse dissemination size and was easy to be dissociated; arsenopyrite and jamesonite were fine and interspersed with other metallic minerals, and difficult to be dissociated; there was high content of easily mudded mineral in nonmetallic mineral, which might adversely affected flotation.