N-十二烷基-1,3-丙二胺在赤铁矿反浮选中的应用

通过单矿物试验考察了N-十二烷基-1,3-丙二胺(ND13)对赤铁矿和石英的浮选行为,结果表明,ND13对石英具有良好的捕收性能,在捕收剂用量为50mg/L,pH=7～10时,石英回收率达93%以上.人工混合矿分选试验结果表明,ND13对赤铁矿和石英质量比为1∶1(铁品位为35%)的人工混合矿具有一定的分选效果,在ND13用量为66.7mg/L,淀粉用量为6.67mg/L,pH=7.27的条件下,达到较好的分选效果,此时精矿中铁的回收率为86.35%,精矿的铁品位为62.78%,尾矿的铁品位为9.21%.动电位和红外光谱分析结果表明,ND13主要以静电和氢键作用在矿物表面发生吸附.

Application of N-Laurel-1,3-Diaminopropanes as Collector in Reverse Flotation of Hematite

The flotation capability of N-laurel-1, 3-diaminopropanes (ND13) for hematite and quartz were studied in laboratory via single mineral flotation and the results showed that ND13 has high catchability to quartz, i.e., when the concentration of collector is 50 mg/L with the pH value of pulp 7~10, the recovery of quartz is over 93%. The flotation test results of manually mixed ore samples where the mass ratio of hematite to quartz is 1:1 with iron grade 35% showed that ND13 can separate hematite from quartz better, i.e., the iron recovery from ore concentrate is 86.35% the iron grade of ore concentrate 62.78% and that of tailings 9.21% if the concentration of ND13 is 66.7 mg/L and that of starch 6.67 mg/L with pH value 7.27. The analysis of zeta-potentials and IR spectra indicated that both the electrostatic adsorption and hydrogen bonding adsorption take place between ND13 and minerals surfaces.