The strong collecting performance of N-laurel-1,3-diaminopropane（ND13） with respect to quartz encouraged us to study its separation of hematite and quartz mixtures in a laboratory cell flotation test The results sho...The strong collecting performance of N-laurel-1,3-diaminopropane（ND13） with respect to quartz encouraged us to study its separation of hematite and quartz mixtures in a laboratory cell flotation test The results show that the best separation results can be achieved when the pulp pH is 7.27 and 58.3 mg/L collector plus 6.67 mg/L depressant are added to the mixture.Products with 58.45%,62.78%and 63.72% iron grades can be achieved respectively when mass ratio of hematite to quartz is 2：3,1：1,and 3：2.The adsorption mechanism of ND13 on a quartz surface was investigated by zeta-potential and X-ray photoelectron spectroscopy measurements.The results reveal that electrostatic and hydrogen bonding adsorption take place between ND13 and the quartz surface,and that ND13 mainly interacts with the oxygen atoms on the quartz surface.展开更多
基金Financial support for this research provided by the National Key Technology Development and Research Programs of China(Nos. 2008BAB32B14 and 2008BAB31B03)
文摘The strong collecting performance of N-laurel-1,3-diaminopropane（ND13） with respect to quartz encouraged us to study its separation of hematite and quartz mixtures in a laboratory cell flotation test The results show that the best separation results can be achieved when the pulp pH is 7.27 and 58.3 mg/L collector plus 6.67 mg/L depressant are added to the mixture.Products with 58.45%,62.78%and 63.72% iron grades can be achieved respectively when mass ratio of hematite to quartz is 2：3,1：1,and 3：2.The adsorption mechanism of ND13 on a quartz surface was investigated by zeta-potential and X-ray photoelectron spectroscopy measurements.The results reveal that electrostatic and hydrogen bonding adsorption take place between ND13 and the quartz surface,and that ND13 mainly interacts with the oxygen atoms on the quartz surface.
