关键词: 低品位铜硫矿石, 水溶性铜, 酸浸, 选冶联合流程, 浮选, 磁选

Abstract: Main valuable elements copper，sulfur，iron grade is 0.51%，27.68% and 34.07% in a low-grade copper ore from Guangdong province.Copper occurrence state is complex，secondary copper sulfide copper accounted for 54.91% of total copper，water soluble copper accounted for 26.39% of total copper，high copper recovery cannot obtained by conventional flotation method.To explore high efficient separation technology for copper，sulfur，iron，metallurgy process research was conducted.Results show that at the grinding fineness of 72% passing 0.074 mm，using sulfuric acid solution with pH=3 as leaching agent，the liquid-solid ratio of 4 mL/g，stirring speed of 1 400 r/min，leaching time of 24 h，copper leaching rate of 93.33% can be obtained；Copper leaching slag being lavated to pH=6 via one roughing one scavenging sulfur flotation process using butyl xanthate as collector，2# oil as frother，the sulfur concentrate was obtained with sulfur grade of 48.44% and recovery to copper leaching slag is 95.57%；Sulfur flotation tailings via one stage high gradient high intensity magnetic separation operation using Ф2 mm rods medium as magnetic medium，pulsating stroke is 16 mm，pulsating frequency is 280 times/min，background magnetic field intensity is 0.6 T，the iron concentrate was obtained with iron grade of 51.42%，recovery to copper leaching slag is 17.02%.The abrove test results indicated that effective separation of copper，sulfur and iron can be realized via copper leaching-sulfur flotation-magnetic separation technological process.

Key words: Low grade copper-sulfur ore, Water-soluble copper, Acid leaching, Beneficiation-metallurgy combined process, Flotation, Magnetic separation