河南某花岗岩尾矿综合利用试验研究

Comprehensive Recovery of Nonmetallic Minerals from Granite Tailings in Henan Province

为实现河南某花岗岩尾矿中非金属矿物资源综合回收,并探讨其制备高纯石英的可行性,对其进行了详细试验研究。结果表明,该花岗岩尾矿主要矿物为斜长石、石英、钾长石和云母,具有综合利用潜力,采用擦洗磁选-脱泥预处理-云母长石石英依次优先浮选的工艺流程,可获得Al_(2)O_(3)、K_(2)O、Na_(2)O、SiO_(2)、Fe_(2)O_(3)含量分别为33.84%、8.13%、0.32%、56.78%、0.121%的云母精矿,Al_(2)O_(3)、K_(2)O、Na_(2)O、SiO_(2)、Fe_(2)O_(3)含量分别为15.89%、2.16%、10.68%、71.06%、0.124%的长石精矿,Al_(2)O_(3)、K_(2)O、Na_(2)O、SiO_(2)、Fe_(2)O_(3)含量分别为1.05%、0.17%、0.56%、97.76%、0.106%的石英精矿;石英精矿经进一步深度提纯后,可获得SiO_(2)含量99.994%的高纯石英砂。

Experimental study was carried out to realize comprehensive recovery of non-metallic mineral resources from granite tailings in Henan Province,and explore the feasibility of preparing high-purity quartz.The results show that the granite tailings,mainly containing minerals of plagioclase feldspar,quartz,potassium feldspar and mica,have potential to be comprehensively utilized.With a flowsheet consisting sequentially of scrubbing-magnetic separation,pre-treatment of desliming,and mica-feldspar-quartz preferential flotation,a mica concentrate with Al_(2)O_(3)、K_(2)O、Na_(2)O、SiO_(2) and Fe_(2)O_(3) contents of 33.84%,8.13%,0.32%,56.78%and 0.121%,a feldspar concentrate with Al_(2)O_(3)、K_(2)O、Na_(2)O、SiO_(2) and Fe_(2)O_(3)contents of 15.89%,2.16%,10.68%,71.06%and 0.124%,and a quartz concentrate with Al_(2)O_(3)、K_(2)O、Na_(2)O、SiO_(2)and Fe_(2)O_(3) contents of 1.05%,0.17%,0.56%,97.76%and 0.106%,respectively,can be collected.The quartz concentrate can be further purified to obtain a high-purity quartz sand with SiO_(2) content of 99.994%.