疏水碳链长度对胺类捕收剂起泡性能的影响研究
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摘要
为了研究疏水碳链中碳原子数目对胺类捕收剂起泡性能的影响,采用充气法对十二胺、十四胺和十六胺产生的泡沫体积、泡沫半衰期和泡沫大小分布等参数进行了测量。结果表明:在溶液p H=6.0时,具有最大发泡体积的捕收剂种类由高到低依次是十四胺>十六胺>十二胺;在药剂用量均为1.0 g/L时,起泡能力由强到弱为十四胺>十六胺>十二胺;随着捕收剂疏水碳链中碳原子数的增加,分子间的相互作用增强,溶液黏度增大,泡沫半衰期也大幅增加,t1/2由高到低依次是十六胺>十四胺>十二胺;气泡索特直径达到最小值时的药剂用量由低到高依次为十六胺<十四胺<十二胺;胺类捕收剂中疏水碳链越长,其最大发泡体积和CCC也更容易在低浓度下达到,在试验药剂用量范围内,药剂溶液黏度由低到高依次为:十二胺<十四胺<十六胺,药剂溶液黏度越大,产生的泡沫稳定性越好。
In order to study the effect of the number of carbon atoms in the hydrophobic carbon chain on the perfor?mance of the amine collector foaming ability,the aeration method was used to capture the foam volume of dodecylamine,tetra?decylamine and hexadecylamine. The parameters such as foam half-life and foam size distribution were also measured. The re?sults show that the order of the agents has biggest foam volume at pH=6.0 from high to low is tetradecylamine>hexadecylam?ine>dodecylamine. As the number of carbon atoms in the hydrophobic carbon chain increases,the interaction between the molecules increases,and the viscosity of the solution increases,so that the half-life of the foam is also greatly increased. The order of t1/2 from large to small is hexadecylamine>tetradecylamine>dodecylamine. When the foam Sauter diameter reach the minimum number,the dosage of agents from low to high is tetradecylamine
In order to study the effect of the number of carbon atoms in the hydrophobic carbon chain on the perfor?mance of the amine collector foaming ability,the aeration method was used to capture the foam volume of dodecylamine,tetra?decylamine and hexadecylamine. The parameters such as foam half-life and foam size distribution were also measured. The re?sults show that the order of the agents has biggest foam volume at pH=6.0 from high to low is tetradecylamine>hexadecylam?ine>dodecylamine. As the number of carbon atoms in the hydrophobic carbon chain increases,the interaction between the molecules increases,and the viscosity of the solution increases,so that the half-life of the foam is also greatly increased. The order of t1/2 from large to small is hexadecylamine>tetradecylamine>dodecylamine. When the foam Sauter diameter reach the minimum number,the dosage of agents from low to high is tetradecylamine
引文
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[2]格劳R A.起泡剂对气泡大小的影响[J].国外金属矿选矿,2006(3):33-46.Grou R A.Effect of foaming agent on bubble size[J].Metallic Ore Dressing Abroad,2006(3):33-46.
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[4]曹玉川.新型铁矿阳离子捕收剂的浮选及泡沫性能研究[D].长沙:中南大学,2011.Cao Yuchuan.Flotation and Foam Properties of a New Type of Cationic Collector for Iron Ore[D].Changsha:Central South University,2011.
[5]郑伟.我国浮选起泡剂的研究进展[J].有色金属:选矿部分,2004(1):37-40.Zheng Wei.Research progress of flotation frothing agents in China[J].Nonferrous Metals:Mineral Processing Section,2004(1):37-40.
[6]张世杰,刘文礼,赵树凯.浮选气泡测量及其影响因素分析[J].煤炭工程,2014,46(12):117-119.Zhang Shijie,Liu Wenli,Zhao Shukai.Measurement of flotation bubbles and analysis of influencing factors[J].Coal Engineering,2014,46(12):117-119.
[7]麦罗F,等.浮选起泡剂的基本性质及其对浮选的影响[J].国外金属矿选矿,2007(4):31-35.Mailuo F,et al.Basic properties of flotation frothing agent and itseffect on flotation[J].Metallic Ore Dressing Abroad,2007(4):31-35.
[8]谷艳玲.硫化矿浮选起泡剂性能与作用研究[D].长沙:中南大学,2013.Gu Yanling.Study on Properties and Effects of Flotation Foaming Agent for Sulfide Ore[D].Changsha:Central South University,2013.
[9]Toshiyuki S,Watanabe M,Fukano T.Effects of viscosity on coalescence of a bubble upon impact with a free surface[J].Chemical Engineering Science,2005(6):5372-5384.
[10]刘华森,阳春华,王雅琳.微泡浮选中气泡尺寸影响分析与参数优化[J].矿业工程研究,2009,24(4):58-61.Liu Huasen,Yang Chunhua,Wang Yalin.Influence analysis and parameter optimization of bubble size in microbubble flotation[J].Mining Engineering Research,2009,24(4):58-61.
[11]龚明光.泡沫浮选[M].北京:冶金工业出版社,2008:108-122.Gong Mingguang.Foam Flotation[M].Beijing:Metallurgical Industry Press,2008:108-122.
[12]石少波.水溶性高分子溶液粘度的研究[D].青岛:中国海洋大学,2005.Shi Shaobo.Study on Viscosity of Water-Soluble Polymer Solution[D].Qingdao:Ocean University of China,2005.