(1. 福州大學(xué) 紫金礦業(yè)學(xué)院，福州 350116；
2. 靈寶金源礦業(yè)股份有限公司，靈寶 472500)
摘 要: 對河南盧氏花崗偉晶巖的礦物學(xué)特征進(jìn)行研究，開發(fā)“重選-正反浮選”聯(lián)合工藝回收鋰電氣石和云母新技術(shù)，采用光學(xué)顯微鏡(OM)、XRD、SEM及EDS對原礦和精礦形貌及礦物組成進(jìn)行表征，并對原礦、精礦及尾礦中元素含量進(jìn)行分析。結(jié)果表明：花崗偉晶巖主要礦物組成為鋰電氣石、石英、鈉長石、白云母和鋰云母；當(dāng)磨礦粒度小于74 μm的礦石含量為40%時(shí)，采用“重選-浮選”新技術(shù)可獲得鋰電氣石品位為98.31%、回收率為82.19%的鋰電氣石精礦和云母品位為98.94%、回收率為93.95%的云母精礦；鋰電氣石化學(xué)式為Na(Li,Al2)Al6(BO3)3Si6O18(OH)x(x=4或5)，結(jié)晶度為95.94%。
關(guān)鍵字: 偉晶巖；鋰電氣石；結(jié)晶度；礦物學(xué)特征；綜合利用
（1. College of Zijin Mining，F(xiàn)uzhou University, Fuzhou 350116, China;
2. Lingbao Jinyuan Mining Company Limited, Lingbao 472500, China）
Abstract:Based on the study of mineralogical characteristics of granitic pegmatite in Lushi, Henan Province, a novel technology for recovery of elbaite and mica was developed with gravity and direct or reverse-flotation separation. The morphology and the mineral composition of the raw ore and the concentrate were investigated by optical microscopy (OM), XRD, SEM and EDS, and chemical composition of the raw ore, concentrate and tailings were analyzed. The results show that the major minerals of granitie pegmatite are elbaite, quartz, albite, muscovite and lepidolite. The elbaite concentrate with tourmaline grade of 98.31% and tourmaline recovery of 82.19% and mica concentrate with mica grade of 98.94% and mica recovery of 93.95% can be obtained by gravity and flotation when the particle grinding size of mineral less than 74 μm and content of 40%. The chemical formula for elbaite is Na(Li,Al2)Al6(BO3)3Si6O18(OH)x(x=4 or 5) with crystallization of 95.94%.
Key words: pegmatite; elbaite; crystallization; mineralogical characteristics; comprehensive utilization
