搅拌过程铝离子溶出对微细粒一水硬铝石浮选的影响
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摘要
以油酸钠为捕收剂,考察了搅拌预处理引起的铝离子溶出对微细粒一水硬铝石浮选行为的影响。浮选结果表明:添加少量铝离子能促进矿物浮选,添加铝离子浓度大于1×10~(-5)mol/L后,矿物可浮性逐渐降低;短时间搅拌预处理可提高浮选回收率,搅拌时间大于10 min后,浮选效果逐渐变差。ICP、吸附量、接触角测定结果和浮选溶液化学分析表明:铝离子添加量较小时,溶液中铝离子主要形成羟基络合物,促进油酸钠吸附,增强矿物疏水性;铝离子添加量较大时,亲水性氢氧化物沉淀逐渐增多,矿物疏水性变差,可浮性降低。Zeta电位和粒度测试结果表明:搅拌预处理后,颗粒表面负电性降低、粒度变粗,这说明颗粒形成絮团。适宜条件下搅拌预处理有助于絮团生长,这也是搅拌预处理相比于直接添加铝离子能够获得更高浮选回收率的重要原因。
The objective of this study was to assess the effect of Al~(3+)dissolution induced by pre-agitation on the flotation of ultra-fine diaspore with the addition of NaOl. The results of flotation tests show that the addition of a small amount of Al~(3+)into the pulp is helpful for flotation, however, after Al~(3+)concentration is higher than 1×10~(-5) mol/L, the addition of Al~(3+)has a detrimental effect on flotation. A short time of pre-agitation can improve the recovery of diaspore, while the recovery decreases gradually when the miners are agitated more than 10 min. ICP measurements, adsorption capacity measurements, contact angle measurements and the analysis results of flotation solution chemistry show that Al~(3+)exists mainly as a form of hydroxy complexes in solution with a small additive quantity, which promotes the adsorption of NaOl on the mineral surface and enhances the hydrophobicity of diaspore. With a big additive quantity, the amount of hydrophilic hydroxide precipitation increases gradually, and the hydrophobicity of minerals becomes worse so that the floatability is decreased. Zeta potential measurements and particle size measurements show that the electronegativity of particles decreases and the particle size increases after pre-agitation, the results indicate the formation of flocculation.Compared with the direct addition of Al~(3+), an appropriate pre-agitation is beneficial to the formation of hydrophobic flocculation in pre-agitation, which is also an important reason for the higher recovery.
The objective of this study was to assess the effect of Al~(3+)dissolution induced by pre-agitation on the flotation of ultra-fine diaspore with the addition of NaOl. The results of flotation tests show that the addition of a small amount of Al~(3+)into the pulp is helpful for flotation, however, after Al~(3+)concentration is higher than 1×10~(-5) mol/L, the addition of Al~(3+)has a detrimental effect on flotation. A short time of pre-agitation can improve the recovery of diaspore, while the recovery decreases gradually when the miners are agitated more than 10 min. ICP measurements, adsorption capacity measurements, contact angle measurements and the analysis results of flotation solution chemistry show that Al~(3+)exists mainly as a form of hydroxy complexes in solution with a small additive quantity, which promotes the adsorption of NaOl on the mineral surface and enhances the hydrophobicity of diaspore. With a big additive quantity, the amount of hydrophilic hydroxide precipitation increases gradually, and the hydrophobicity of minerals becomes worse so that the floatability is decreased. Zeta potential measurements and particle size measurements show that the electronegativity of particles decreases and the particle size increases after pre-agitation, the results indicate the formation of flocculation.Compared with the direct addition of Al~(3+), an appropriate pre-agitation is beneficial to the formation of hydrophobic flocculation in pre-agitation, which is also an important reason for the higher recovery.
引文
[1]SUN Wei,HU Yue-hua,DAI Jing-ping,LIU Run-qing.Observation of fine particle aggregating behavior induced by high intensity conditioning using high speed CCD[J].2006,16(1):198-202.
[2]WARREN L J.Shear-flocculation of ultrafine scheelite in sodium oleate solutions[J].Journal of Colloid&Interface Science,1975,50(2):307-318.
[3]YIN Wan-zhong,YANG Xiao-sheng,ZHOU Da-peng,LIYan-jun,LU Zhen-fu.Shear hydrophobic flocculation and flotation of ultrafine Anshan hematite using sodium oleate[J].Transactions of Nonferrous Metals Society of China,2011,21(3):652-664.
[4]张国范,鄢代翠,朱阳戈,冯其明,欧乐明,卢毅屏.Ca2+对钛铁矿与钛辉石浮选行为的影响[J].中南大学学报(自然科学版),2011,42(3):561-567.ZHANG Guo-fan,YAN Dai-cui,ZHU Yang-ge,FENG Qi-ming,OU Le-ming,LU Yi-ping.Influence of calcium ion on flotation of ilmenite and titanaugite[J].Journal of Central South University(Science and Technology),2011,42(3):561-567.
[5]石绍渊,方兆珩.金属离子强化铁闪锌矿浮选精矿的生物浸出[J].中国有色金属学报,2005,15(10):1623-1628.SHI Shao-yuan,FANG Zhao-heng.Enhancement of bioleaching of marmatite flotation concentrate by metallic ions[J].The Chinese Journal of Nonferrous Metals,2005,15(10):1623-1628.
[6]周瑜林,王毓华,胡岳华,孙大翔,喻明军.金属离子对一水硬铝石和高岭石浮选行为的影响[J].中南大学学报(自然科学版),2009,40(2):268-274.ZHOU Yu-lin,WANG Yu-hua,HU Yue-hua,SUN Da-xiang,YUMing-jun.Influence of metal ions on floatability of diaspore and kaolinite[J].Journal of Central South University(Science and Technology),2009,40(2):268-274.
[7]高跃升,高志勇,孙伟.金属离子对矿物浮选行为的影响及机理研究进展[J].中国有色金属学报,2017,27(4):859-868.GAO Yue-sheng,GAO Zhi-yong,SUN Wei.Research progress of influence of metal ions on mineral flotation behavior and underlying mechanism[J].The Chinese Journal of Nonferrous Metals,2017,27(4):859-868.
[8]WANG Yu-hua,YU Fu-shun.Effects of metallic ions on the flotation of spodumene and beryl[J].International Journal of Mining Science and Technology,2007,17(1):35-39.
[9]LIU Wei-jun,ZHANG Shi-qiu,WANG Wei-qing,ZHANG Jie,YAN Wu,DENG Jie,FENG Qi-ming,HUANG Yang.The effects of Ca(Ⅱ)and Mg(Ⅱ)ions on the flotation of spodumene using NaOl[J].Minerals Engineering,2015,79:40-46.
[10]ZHANG Jie,WANG Wei-qing,LIU Jing,HUANG Yang,FENGQi-ming,ZHAO Hong.Fe(Ⅲ)as an activator for the flotation of spodumene,albite,and quartz minerals[J].Minerals Engineering,2014,61(6):16-22.
[11]袁致涛,张其东,刘炯天.金属离子对辉钼矿浮选的影响及机理研究[J].东北大学学报(自然科学版),2016,37(7):1013-1016.YUAN Zhi-tao,ZHANG Qi-dong,LIU Jiong-tian.Influence and mechanism of metal ions on flotation of molybdenite[J].Journal of Northeastern University(Science and Technology),2016,37(7):1013-1016.
[12]葛英勇,侯静涛,余俊.微细粒矿物浮选技术进展[J].金属矿山,2010(12):90-94,106.GE Ying-yong,HOU Jing-tao,YU Jun.Advances in micro-fine mineral flotation technology[J].Metal Mine,2010(12):90-94,106.
[13]NGUYEN A V,GEORGE P,JAMESON G J.Demonstration of a minimum in the recovery of nanoparticles by flotation:Theory and experiment[J].Chemical Engineering Science,2006,61(8):2494-2509.
[14]MIETTINEN T,RALSTON J,FORNASIERO D.The limits of fine particle flotation[J].Minerals Engineering,2010,23(5):420-437.
[15]冯其明,周伟光,石晴.纳米气泡的形成及其对微细粒矿物浮选的影响[J].中南大学学报(自然科学版),2017,48(1):9-15.FENG Qi-ming,ZHOU Wei-guang,SHI Qing.Formation of nano-bubbles and their influences on ultrafine mineral flotation[J].Journal of Central South University(Science and Technology),2017,48(1):9-15.
[16]JOANNE V,STEARNES B.Fine particles flotation and the influence of dissolved gas on interpaticle interractions[D].Adelaide:Ian Wark Research Institute,2000.
[17]蒋昊,彭伟文,杨沁红,赵琛.阴离子-非离子组合药剂对一水硬铝石浮选和泡沫稳定性的影响[J].中国有色金属学报,2017,27(8):1708-1714.JIANG Hao,PENG Wei-wen,YANG Qin-hong,ZHAO Chen.Effect of mixed anionic-nonionic reagents on flotation of diaspore and stability of froth[J].The Chinese Journal of Nonferrous Metals,2017,27(8):1708-1714.
[18]黄根.浮选调浆的界面效应及过程强化研究[D].徐州:中国矿业大学,2013.HUANG Gen.Interfacial effects of flotation conditioning and process intensification[D].Xuzhou:China University of Mining and Technology,2013.
[19]冯程,卢毅屏,冯其明,石晴.强搅拌调浆对硫化镍矿浮选的作用[J].中南大学学报(自然科学版),2016,47(11):3621-3626.FENG Cheng,LU Yi-ping,FENG Qi-ming,SHI Qing.Effect of high intensity conditioning on flotation of nickel sulfide mineral[J].Journal of Central South University(Science and Technology),2016,47(11):3621-3626.
[20]卢佳,高惠民,金俊勋,岑对对,任子杰.钙离子对红柱石浮选的影响及作用机理[J].中国有色金属学报,2016,26(6):1311-1315.LU Jia,GAO Hui-min,JIN Jun-xun,CEN Dui-dui,REN Zi-jie.Effect and mechanism of calcium ion on flotation of andalusite[J].The Chinese Journal of Nonferrous Metals,2016,26(6):1311-1315.
[21]董宏军,陈荩,毛钜凡.金属离子对蓝晶石可浮性的影响及机理研究[J].非金属矿,1996(1):27-29,40.DONG Hong-jun,CHEN Jin,MAO Ju-fan.Influence and mechanism of metal ions on flotation of kyanite[J].Nonferrous Metals,1996(1):27-29,40.
[22]官贵臣,刘杰,韩跃新.金属离子对微细粒锡石浮选行为的影响[J].矿产综合利用,2016(4):43-47.GUAN Gui-chen,LIU Jie,HAN Yue-xin.Effect of metal ions on flotation behaviors of fine cassiterite[J].Multipurpose Utilization of Mineral Resources,2016(4):43-47.
[23]刘亚川,龚焕高,张克仁.金属离子对浮选药剂作用的影响[J].金属矿山,1994(2):45-48.LIU Ya-chuan,GONG Huan-gao,ZHANG Ke-ren.Effects of metal ions on the flotation reagent functions[J].Metal Mine,1994(2):45-48.
[24]FERNANDO C A.Particle aggregation by coagulation and flocculation[C]//Solid-Liquid Separation in the Mining Industry.Springer International Publishing,2014:143-172.
[25]陈军.高泥化煤泥水中微细颗粒疏水聚团特性及机理研究[D].合肥:安徽理工大学,2017.CHEN Jun.Characteristics and mechanism research on hydrophobic aggregation of fine particles in high muddied coal slurry water[D].Hefei:Anhui University of Science and Technology,2017.
[26]ZHOU Wei-guang,OU Le-ming,SHI Qing,CHEN Hao.Aggregation of ultra-fine scheelite particles induced by hydrodynamic cavitation[J].International Journal of Mineral Processing,2016,157:236-240.
[2]WARREN L J.Shear-flocculation of ultrafine scheelite in sodium oleate solutions[J].Journal of Colloid&Interface Science,1975,50(2):307-318.
[3]YIN Wan-zhong,YANG Xiao-sheng,ZHOU Da-peng,LIYan-jun,LU Zhen-fu.Shear hydrophobic flocculation and flotation of ultrafine Anshan hematite using sodium oleate[J].Transactions of Nonferrous Metals Society of China,2011,21(3):652-664.
[4]张国范,鄢代翠,朱阳戈,冯其明,欧乐明,卢毅屏.Ca2+对钛铁矿与钛辉石浮选行为的影响[J].中南大学学报(自然科学版),2011,42(3):561-567.ZHANG Guo-fan,YAN Dai-cui,ZHU Yang-ge,FENG Qi-ming,OU Le-ming,LU Yi-ping.Influence of calcium ion on flotation of ilmenite and titanaugite[J].Journal of Central South University(Science and Technology),2011,42(3):561-567.
[5]石绍渊,方兆珩.金属离子强化铁闪锌矿浮选精矿的生物浸出[J].中国有色金属学报,2005,15(10):1623-1628.SHI Shao-yuan,FANG Zhao-heng.Enhancement of bioleaching of marmatite flotation concentrate by metallic ions[J].The Chinese Journal of Nonferrous Metals,2005,15(10):1623-1628.
[6]周瑜林,王毓华,胡岳华,孙大翔,喻明军.金属离子对一水硬铝石和高岭石浮选行为的影响[J].中南大学学报(自然科学版),2009,40(2):268-274.ZHOU Yu-lin,WANG Yu-hua,HU Yue-hua,SUN Da-xiang,YUMing-jun.Influence of metal ions on floatability of diaspore and kaolinite[J].Journal of Central South University(Science and Technology),2009,40(2):268-274.
[7]高跃升,高志勇,孙伟.金属离子对矿物浮选行为的影响及机理研究进展[J].中国有色金属学报,2017,27(4):859-868.GAO Yue-sheng,GAO Zhi-yong,SUN Wei.Research progress of influence of metal ions on mineral flotation behavior and underlying mechanism[J].The Chinese Journal of Nonferrous Metals,2017,27(4):859-868.
[8]WANG Yu-hua,YU Fu-shun.Effects of metallic ions on the flotation of spodumene and beryl[J].International Journal of Mining Science and Technology,2007,17(1):35-39.
[9]LIU Wei-jun,ZHANG Shi-qiu,WANG Wei-qing,ZHANG Jie,YAN Wu,DENG Jie,FENG Qi-ming,HUANG Yang.The effects of Ca(Ⅱ)and Mg(Ⅱ)ions on the flotation of spodumene using NaOl[J].Minerals Engineering,2015,79:40-46.
[10]ZHANG Jie,WANG Wei-qing,LIU Jing,HUANG Yang,FENGQi-ming,ZHAO Hong.Fe(Ⅲ)as an activator for the flotation of spodumene,albite,and quartz minerals[J].Minerals Engineering,2014,61(6):16-22.
[11]袁致涛,张其东,刘炯天.金属离子对辉钼矿浮选的影响及机理研究[J].东北大学学报(自然科学版),2016,37(7):1013-1016.YUAN Zhi-tao,ZHANG Qi-dong,LIU Jiong-tian.Influence and mechanism of metal ions on flotation of molybdenite[J].Journal of Northeastern University(Science and Technology),2016,37(7):1013-1016.
[12]葛英勇,侯静涛,余俊.微细粒矿物浮选技术进展[J].金属矿山,2010(12):90-94,106.GE Ying-yong,HOU Jing-tao,YU Jun.Advances in micro-fine mineral flotation technology[J].Metal Mine,2010(12):90-94,106.
[13]NGUYEN A V,GEORGE P,JAMESON G J.Demonstration of a minimum in the recovery of nanoparticles by flotation:Theory and experiment[J].Chemical Engineering Science,2006,61(8):2494-2509.
[14]MIETTINEN T,RALSTON J,FORNASIERO D.The limits of fine particle flotation[J].Minerals Engineering,2010,23(5):420-437.
[15]冯其明,周伟光,石晴.纳米气泡的形成及其对微细粒矿物浮选的影响[J].中南大学学报(自然科学版),2017,48(1):9-15.FENG Qi-ming,ZHOU Wei-guang,SHI Qing.Formation of nano-bubbles and their influences on ultrafine mineral flotation[J].Journal of Central South University(Science and Technology),2017,48(1):9-15.
[16]JOANNE V,STEARNES B.Fine particles flotation and the influence of dissolved gas on interpaticle interractions[D].Adelaide:Ian Wark Research Institute,2000.
[17]蒋昊,彭伟文,杨沁红,赵琛.阴离子-非离子组合药剂对一水硬铝石浮选和泡沫稳定性的影响[J].中国有色金属学报,2017,27(8):1708-1714.JIANG Hao,PENG Wei-wen,YANG Qin-hong,ZHAO Chen.Effect of mixed anionic-nonionic reagents on flotation of diaspore and stability of froth[J].The Chinese Journal of Nonferrous Metals,2017,27(8):1708-1714.
[18]黄根.浮选调浆的界面效应及过程强化研究[D].徐州:中国矿业大学,2013.HUANG Gen.Interfacial effects of flotation conditioning and process intensification[D].Xuzhou:China University of Mining and Technology,2013.
[19]冯程,卢毅屏,冯其明,石晴.强搅拌调浆对硫化镍矿浮选的作用[J].中南大学学报(自然科学版),2016,47(11):3621-3626.FENG Cheng,LU Yi-ping,FENG Qi-ming,SHI Qing.Effect of high intensity conditioning on flotation of nickel sulfide mineral[J].Journal of Central South University(Science and Technology),2016,47(11):3621-3626.
[20]卢佳,高惠民,金俊勋,岑对对,任子杰.钙离子对红柱石浮选的影响及作用机理[J].中国有色金属学报,2016,26(6):1311-1315.LU Jia,GAO Hui-min,JIN Jun-xun,CEN Dui-dui,REN Zi-jie.Effect and mechanism of calcium ion on flotation of andalusite[J].The Chinese Journal of Nonferrous Metals,2016,26(6):1311-1315.
[21]董宏军,陈荩,毛钜凡.金属离子对蓝晶石可浮性的影响及机理研究[J].非金属矿,1996(1):27-29,40.DONG Hong-jun,CHEN Jin,MAO Ju-fan.Influence and mechanism of metal ions on flotation of kyanite[J].Nonferrous Metals,1996(1):27-29,40.
[22]官贵臣,刘杰,韩跃新.金属离子对微细粒锡石浮选行为的影响[J].矿产综合利用,2016(4):43-47.GUAN Gui-chen,LIU Jie,HAN Yue-xin.Effect of metal ions on flotation behaviors of fine cassiterite[J].Multipurpose Utilization of Mineral Resources,2016(4):43-47.
[23]刘亚川,龚焕高,张克仁.金属离子对浮选药剂作用的影响[J].金属矿山,1994(2):45-48.LIU Ya-chuan,GONG Huan-gao,ZHANG Ke-ren.Effects of metal ions on the flotation reagent functions[J].Metal Mine,1994(2):45-48.
[24]FERNANDO C A.Particle aggregation by coagulation and flocculation[C]//Solid-Liquid Separation in the Mining Industry.Springer International Publishing,2014:143-172.
[25]陈军.高泥化煤泥水中微细颗粒疏水聚团特性及机理研究[D].合肥:安徽理工大学,2017.CHEN Jun.Characteristics and mechanism research on hydrophobic aggregation of fine particles in high muddied coal slurry water[D].Hefei:Anhui University of Science and Technology,2017.
[26]ZHOU Wei-guang,OU Le-ming,SHI Qing,CHEN Hao.Aggregation of ultra-fine scheelite particles induced by hydrodynamic cavitation[J].International Journal of Mineral Processing,2016,157:236-240.
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