湖南某钾钠长石矿选矿试验

湖南某长石矿矿物组成复杂，主要有用矿物为长石和石英。为开发利用该矿石，对其进行了选矿试验研究。结果表明：在磨矿细度为-0.074 mm占62.36%时，原矿经脱泥-脱石英浮选后，以硫酸为调整剂、N-烷基丙撑二胺+石油磺酸钠为捕收剂经1粗2扫长石-石英分离浮选，获得了Al₂O₃含量为18.68%的长石浮选精矿和SiO2含量为98.35%的石英浮选精矿；长石浮选精矿经1粗1精磁选除铁获得了Al₂O₃含量为18.68%、Fe₂O₃为0.18%、Na₂O+K₂O为12.28%的长石精矿，达到了陶瓷工业的一级质量标准；石英浮选精矿在0.35 T条件下磁选除铁后获得了SiO₂含量为98.35%、Fe₂O₃为0.076%的石英精矿，满足玻璃工业二级质量要求。

Beneficiation Tests of Feldspar from Hunan

Main minerals in a feldspar ore of Hunan Province are feldspar and quartz.Beneficiation experiments were conducted for the development and utilization of the ore.Results show that at the grinding fineness is 62.36% -0.074 mm，after desliming and quartz discarding flotation，with sulfuric acid modifier，N-alkyl diaminopropane + petroleum sodium sulfonate as collector by one roughing and two scavenging feldspar-quartz separating floattion，feldspar concentrate with 18.68% Al₂O₃ and quartz concentrate with 98.35% SiO₂ are obtained.Through one roughing and one cleaning magnet separation for iron removal dealing with feldspar flotation concentrate，feldspar concentrate with 18.68% Al₂O₃，0.18% Fe₂O₃ and 12.28% Na₂O+K₂O was received.Quartz concentrates with 98.35% SiO₂ and 0.076% Fe₂O₃ was received dealing with quartz flotation concentrate at the magnet intensity of 0.35 T for iron removal.The feldspar concentrates meets the first-grade quality standard of ceramics，while the quartz concentrates for the secondary quality standard of glass.