摘要
针对江西某钨锡重选尾矿中石英、长石、云母含量高的特点,试验采用磨矿—磁选除铁—脱泥—云母浮选—石英与长石浮选分离的无氟少酸工艺综合回收石英和长石。在试样磨矿细度-0.074 mm含量占73.20%、磁场强度为1.0 T条件下进行磁选除铁,非磁性产品采用静置—虹吸方法脱去-0.020 mm细泥。磨矿—磁选—脱泥等预处理后的样品采用碳酸钠调整矿浆pH=10.5、捕收剂YF-1用量240 g/t和十二胺用量80 g/t联合浮选云母。对云母浮选尾矿以Ba^(2+)用量120 g/t活化石英、YF-2用量250 g/t抑制长石、捕收剂YF-1用量250 g/t进行石英与长石的浮选分离。石英浮选尾矿即为长石精矿,石英精矿通过酸法反浮选长石工艺得到石英精矿和长石副产品。试验获得石英精矿产率25.30%,SiO_(2)含量99.20%,石英矿物回收率50%;长石精矿产率22.69%,K_(2)O+Na_(2)O含量13.16%,长石副产品产率7.68%,K_(2)O+Na_(2)O含量9.23%,长石矿物总回收率约79%;云母精矿产率14.50%,K_(2)O含量7.65%,Na_(2)O含量1.65%,Al_(2)O_(3)含量16.40%,云母矿物回收率85%。
According to the characteristics of high content of quartz,feldspar and mica in the tailings of tungsten and tin gravity separation from Jiangxi Province,a fluoride-free and less acid process of grinding-iron removal by magnetic separation-desliming-mica floatation-quartz and feldspar flotation separation was adopted to comprehensively recover quartz and feldspar.Magnetic separation was carried out with the sample grinding fineness of−0.074 mm content 73%and the magnetic field intensity of 1.0 T,following the fine mud of−0.020 mm removed by static-siphon method for non-magnetic products.Furthermore,the mica was floated using a combination of YF-1(240 g/t)and dodecylamine(80 g/t)as collectors while the slurry pH was adjusted to 10.5 by Na_(2)CO_(3).Subsequently,quartz and feldspar were separated from mica flotation tailings using Ba^(2+)as the activator of quartz(120 g/t),YF-2 as the inhibitor of feldspar(250 g/t),and YF-1 as the collector(250 g/t).The flotation tailings was feldspar concentrate,and the flotation concentrate was further separated to obtain the quartz concentrate and feldspar by-products by reverse flotation feldspar process under acidic conditions.The yield of quartz concentrate was 25.30%with a SiO2 content of 99.20%,and the recovery rate of quartz mineral was 50%.Additionally,the yield of feldspar concentrate was 22.69%with K_(2)O+Na_(2)O content of 13.16%,while the yield of feldspar by-products was 7.68%with the content of K_(2)O+Na_(2)O of 9.23%,and the total recovery of feldspar mineral was 79%.The yield of mica concentrate was 14.50%,with K_(2)O,Na_(2)O,and Al_(2)O_(3)content of 7.65%,1.65%,and 16.40%,respectively.The recovery rate of mica mineral was 85%.
作者
孔建军
陈慧杰
张明
韦凯
程飞飞
KONG Jianjun;CHEN Huijie;ZHANG Ming;WEI Kai;CHENG Feifei(Suzhou Sinoma Design&Research Institute of Non-metallic Minerals Industry Co.,Ltd.,Suzhou 215151,Jiangsu,China;National Engineering Research Center for Further Processing of Non-metallic Minerals,Suzhou 215151,Jiangsu,China)
出处
《矿产保护与利用》
2022年第6期146-152,共7页
Conservation and Utilization of Mineral Resources
关键词
尾矿
石英
长石
云母
无氟
浮选
tailings
quartz
feldspar
mica
fluoride-free
flotation
