提高德兴铜矿泗洲选矿厂铜回收率的途径
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摘要
针对德兴铜矿低品位矿石(铜品位0.31%)难磨难选的特点,在矿石性质分析的基础上开展了浮选试验研究。矿石黄铜矿主要呈浸染状分布,部分呈细小粒状分布于脉石中或被脉石包裹,少量黄铜矿与黄铁矿毗邻嵌布。全流程闭路浮选结果表明,在磨矿细度为-0.074 mm占61.60%,粗选石灰调矿浆pH值为8.0时,以Mac-12+丁黄药为捕收剂,经1粗2扫铜硫混合浮选,粗精矿再磨至-0.037 mm占68%,经1粗2精2扫铜硫分离浮选,获得的铜精矿铜回收率和品位分别为85.56%、27.27%,较现场当班铜精矿铜品位提高了1.68个百分点,铜回收率提高了3.95个百分点。提高矿浆pH值或优化捕收剂配比可改善粗选泡沫结构,提高浮选指标。
Aiming at the characteristics of refractory copper ore(copper grade is 0.31%)in Dexing Copper Mine,flotation experiment was conducted based on the analysis of ore property. The chalcopyrite is mainly disseminated distributed in the ore,and some of it is distributed as fine granule in the gangue or wrapped by gangue. A small amount of chalcopyrite and pyrite are adjacent to each other. Whole flow of closed circuit flotation results show that at the grinding fineness of 61.60%passing 0.074 mm,lime regulating slurry pH value of 8.0,using Mac-12 + butyl xanthate as collector,via one roughing two scavenging copper flotation,rough concentrate reground to 68% passing 0.037 mm,via one roughing two cleaning two scavenging copper flotation,copper concentrate with copper grade of 27.27% and recovery of 85.56% was obtained,copper grade and recovery increased by 1.68 and 3.95 percentage points respectively. Increase pulp pH or optimize collector mass ratio can improve foaming structure,increase flotation index.
Aiming at the characteristics of refractory copper ore(copper grade is 0.31%)in Dexing Copper Mine,flotation experiment was conducted based on the analysis of ore property. The chalcopyrite is mainly disseminated distributed in the ore,and some of it is distributed as fine granule in the gangue or wrapped by gangue. A small amount of chalcopyrite and pyrite are adjacent to each other. Whole flow of closed circuit flotation results show that at the grinding fineness of 61.60%passing 0.074 mm,lime regulating slurry pH value of 8.0,using Mac-12 + butyl xanthate as collector,via one roughing two scavenging copper flotation,rough concentrate reground to 68% passing 0.037 mm,via one roughing two cleaning two scavenging copper flotation,copper concentrate with copper grade of 27.27% and recovery of 85.56% was obtained,copper grade and recovery increased by 1.68 and 3.95 percentage points respectively. Increase pulp pH or optimize collector mass ratio can improve foaming structure,increase flotation index.
引文
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[16]He Z L,Liu G Y,Yang X L,et al.A novel surfactant,N,N-diethyl-N'-cyclohexylthiourea:Synthesis,flotation and adsorption on chalcopyrite[J].Journal of Industrial and Engineering Chemistry,2016,37:107-114.
[17]Fairthorne G,Fornasiero D,Ralston J.Interaction of thionocarbamate and thiourea collectors with sulphide minerals:a flotation and adsorption study[J].International Journal of Mineral Processing,1997,50:227-242.
[2]詹信顺,钟宏,刘广义.提高德兴铜矿铜浮选回收率的新型捕收剂研究[J].金属矿山,2008(12):70-73.Zhan Xinshun,Zhong Hong,Liu Guangyi.Investigation on new collectors for improving the copper flotation recovery of Dexing Copper Mine[J].Metal Mine,2008(12):70-73.
[3]刘广义,钟宏,戴塔根,等.用Mac-12提高德兴铜矿铜金钼回收率的研究[J].金属矿山,2005(10):33-36.Liu Guangyi,Zhong Hong,Dai Tagen,et al.Research on improving copper and molybdenum recoveries by Mac-12 in Dexing Copper Mine[J].Metal Mine,2005(10):33-36.
[4]刘广义,钟宏,戴塔根,等.提高德兴铜矿高氧化率矿石铜金钼回收率的研究[J].矿业工程,2005(5):23-26.Liu Guangyi,Zhong Hong,Dai Tagen,et al.Study on improving the flotation recoveries of copper,gold and molybdenum from the copper sulfide ores with high oxidation ratio in Dexing Copper Mine[J].Mining and Metallurgical Engineering,2005(5):23-26.
[5]Liu G Y,Yang X L,Zhong H.Molecular design of flotation collectors:a recent progress[J].Adv Colloid Interfac,2017,246:181-195.
[6]Nagaraj D R,Farinato R S.Evolution of flotation chemistry and chemicals:a century of innovations and the lingering challenges[J].Mineral Engineering,2016,96:2-14.
[7]Qiu Z H,Liu G Y,Liu Q X,et al.Separation of pyrite from chalcopyrite and molybdenite by using selective collector of N-isopropoxypropyl-N'-ethoxycarbonyl thiourea in high salinity water[J].Mineral Engineering,2017,100:93-98.
[8]Liu G Y,Xiao J J,Ren H,et al.Adsorption thermodynamics and kinetics of N,N-diisopropoxypropyl-N,N-oxydiethylenedicarbonyl bis(thiourea)on chalcopyrite surfaces[J].Journal of Industrial and Engineering Chemistry,2015,21:306-1313.
[9]Liu G Y,Ren H,Zhan J H,et al.Synthesis,characterization and properties of 3,3'-diethyl-1,1'-oxydiethylenedicarbonyl bis(thiourea)[J].Research on Chemical Intermediates,2014,40:2025-2038.
[10]Liu G Y,Lu Y P,Zhong H,et al.A novel approach for preferential flotation recovery of molybdenite from a porphyry copper molybdenum ore[J].Mineral Engineering,2012,36:37-44.
[11]Liu,G.Y,Qiu,Z.H,Wang,J.Y,et al.Study of N-isopropoxypropyl-N’-ethoxycarbonyl thiourea adsorption on chalcopyrite using in situ SECM,ToF-SIMS and XPS[J].Journal of Colloid and Interface Science,2015,437:42-49.
[12]Liu G Y,Zhong H,Xia L Y,et al.Effect of N-substituents on performance of thiourea collectors by density functional theory calculations[J].Transactions of Nonferrous Metals Society of China,2010,20:695-701.
[13]Liu G Y,Zhong H,Xia L Y,et al.Improving copper flotation recovery from a refractory copper porphyry ore by using ethoxycarbonylthiourea as a collector[J].Mineral Engineering,2011,24:817-824.
[14]Xiao J J,Di N,Liu G Y,et al.The interaction of N-butoxypropylN'-ethoxycarbonylthiourea with sulfide minerals:Scanning electrochemical microscopy,diffuse reflectance infrared Fourier transform spectroscopy,and thermodynamics[J].Journal of Colloid and Interface Science,2014,456:203-210.
[15]顾晓薇,胥孝川,王青,等.世界铜资源格局[J].金属矿山,2015(3):8-13.Gu Xiaowei,Xu Xiaochuan,Wang Qing,et al.The world pattern of copper resource[J].Metal Mine,2015(3):8-13.
[16]He Z L,Liu G Y,Yang X L,et al.A novel surfactant,N,N-diethyl-N'-cyclohexylthiourea:Synthesis,flotation and adsorption on chalcopyrite[J].Journal of Industrial and Engineering Chemistry,2016,37:107-114.
[17]Fairthorne G,Fornasiero D,Ralston J.Interaction of thionocarbamate and thiourea collectors with sulphide minerals:a flotation and adsorption study[J].International Journal of Mineral Processing,1997,50:227-242.