Study on Mechanism of N, N-alkyl Dodecyl Amine in Flotation of Kaolinite and Diaspore
The flotation behavior of kaolinite and diaspore using N, N-diethyl dodecyl amine (DEN12) and N, N-dimethyl dodecyl amine (DRN12) as collector have been investigated through flotation experiments. The mechanism of adsorption of two tertiary amine collectors on surface of kaolinite and diaspore were investigated by FTIR spectral, Zeta potentials measurements and calculation of molecular orbital energy. It has been found that DEN12 and DRN12 have stronger collecting power to kaolinite and weaker collecting abilityto diaspore than DDA. Kaolinite and diaspore in bauxite ores can be separated by using DEN12 and DRN12 as collectors at pulp pH below 8 and 6,respectively. The results of zeta potentials and calculation of molecular orbital energy indicated that the adsorption strength on kaolinite surface is in the order DEN12＞DRN12＞DDA and the adsorption strength on diaspore surface is in the order DDA＞DEN12＞DRN12. FTIR spectral analysis and Zeta potentials approve that the action between kaolinite and tertiary amine collector is strong electrostatic adsorption and that of diaspore is weak electrostatic adsorption in the range of pH 5～6.
Kaolinite Diaspore N, N-diethyl dodecyl amine (DEN12) N, N-dimethyl dodecyl amine (DRN12) Electrostatic adsorption Reverse flotation Infrared spectrum
L. Zhang L. M. Zhang Y. H. Hu X. F. Cao K. Ouyang
Daye Nonferrous Metals Company, Huangshi, Hubei School of Minerals Processing and Bio-Engineering, Central South University, Changsha, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
1580-1586
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）