| 铝土矿反浮选新型阳离子有机硅类捕收剂QAS222 |
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| 引用本文： | 余新阳,钟宏,刘广义,苏晓明.铝土矿反浮选新型阳离子有机硅类捕收剂QAS222[J].中南大学学报(自然科学版),2011,42(7). |
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| 作者姓名： | 余新阳 钟宏 刘广义 苏晓明 |
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| 作者单位： | 1. 中南大学化学化工学院,湖南长沙,410083;江西理工大学资源与环境学院,江西赣州,341000
2. 中南大学化学化工学院,湖南长沙,410083 |
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| 基金项目： | 国家重点基础研究发展计划(“973”)项目，国家自然科学基金资助项目 |
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| 摘 要： | 考察新型阳离子捕收剂有机硅季铵盐QAS222对一水硬铝石、高岭石、叶蜡石、伊利石4种单矿物及其混合物的浮选行为,并对其机理进行分析.研究结果表明,在碱性条件下,QAS222是铝土矿反浮选脱硅的有效捕收剂;在矿浆pH=ll和QAS222浓度为4×10-4 mol/L条件下,可实现不同铝硅比人工混合矿反浮选脱硅.高岭石、伊利石和叶蜡石零电点分别为3.4,3 0和2 5,一水硬铝石与QAS222作用后零电点由6.2提高至10.9;当QAS222浓度为4×10-4 mol/L时,4种矿物表面动电位随矿浆pH增加不同程度地先增加后减少,但在pH=2～12范围内,3种铝硅酸盐矿物动电位大于0V,证实了单矿物浮选实验结果；QAS222在高岭石、叶腊石和伊利石表面除发生静电吸附作用、氢键作用和铵吸附外,还发生化学吸附,使其牢固地吸附在矿物表面,并在广泛pH范围内保持较好可浮性;而当矿浆pH=ll时,QAS222与一水硬铝石作用较弱,很难形成表面吸附,导致其可浮性较差.
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| 关 键 词： | 捕收剂 铝土矿 反浮选 铝硅酸盐矿物 有机硅季铵盐 |
A novel cationic organ silicon collector QAS222 for reverse flotation of bauxite |
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| YU Xin-yang,ZHONG Hong,LIU Guang-yi,SU Xiao-ming.A novel cationic organ silicon collector QAS222 for reverse flotation of bauxite[J].Journal of Central South University:Science and Technology,2011,42(7). |
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| Authors: | YU Xin-yang ZHONG Hong LIU Guang-yi SU Xiao-ming |
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| Institution: | YU Xin-yang1,2,ZHONG Hong1,LIU Guang-yi1,SU Xiao-ming1 (1.School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China,2.School of Resource and Environmental Engineering,JIangxi University of Science and Technology,Ganzhou 341000,China) |
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| Abstract: | The flotation behaviors of diaspore,kaolinite,pyrophyllite illite and their mixture were studied with a novel cationic collector entitled QAS222 and the acting mechnisam of the collector with the minerals was analysed by Zeta potential measuring and FT-IR spectrum analyzing methods.The results indicate that QAS222 is an effective collector in the reverse flotation of bauxite;efficient separations of the mixture at different mass ratios of Al2O3 to SiO2 can be achieved in a slurry of pH=11 at a QAS222 concen... |
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| Keywords: | collector bauxite reverse flotation aluminosilicate minerals organosilicon quaternary ammonium |
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