贵州某锂辉石矿石选矿试验

贵州某锂辉石矿石Li2O含量为1.21%。主要脉石矿物有石英、长石、磷灰石、磁铁矿、高岭石等。为确定锂辉石的回收工艺,进行了选矿试验。矿石采用浮选工艺富集锂辉石、磁选工艺剔除混入锂辉石精矿中的磁铁矿。结果表明,在磨矿细度为-0.074 mm占83.2%的情况下,以油酸钠+水杨羟肟酸(质量配合比为1∶1)为捕收剂,总用量为1 200 g/t,以氯化铁为活化剂,用量为100 g/t,采用1粗1扫3精、中矿顺序返回浮选流程富集锂辉石,1次弱磁选(磁场强度为198.94 k A/m)流程脱铁,最终获得Li_2O品位为6.16%、含铁0.45%、Li_2O回收率为85.43%的锂辉石精矿。

Study on Beneficiation Experiment of Spodumene in Guizhou

There is 1.21% Li₂O in a spodumene ore of Guizhou. The primary gangue minerals were quartz， feldspar， apatite， magnetite， kaolinite， etc. In order to find recovery process of spodumene， beneficiation test was conducted on the ore. The flotation process was investigated in order to concentrate spodumene， followed by magnetic separation process to remove magnetite in spodumene concentrate. The results indicated that， at the grinding fineness of 83.2% -0.074 mm， with sodium oleate and salicylic acid as mixed collector （the mass proportion was 1∶1） the total dosage was 1 200 g/t， and ferric chloride as activator， the dosage was 100 g/t， via one roughing-one scavenging-three cleaning closed circuit process to enrich spodumene， and removal of Fe by one stage low-intensity magnetic separation（the magnetic field intensity was 198.94 kA/m）. Concentrates acquired contain 6.16% Li₂O and 0.45% Fe， and the recovery of Li₂O was 85.43%.