关键词: 长石, 石英, 浮选, 磁选除铁

Abstract: 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.

Key words: Feldspar, Quartz, Flotation, Iron removal by magnet separation