首页|Development and utilization of a novel hydrogen bonding enhanced collector in the separation of apatite from quartz
Development and utilization of a novel hydrogen bonding enhanced collector in the separation of apatite from quartz
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NSTL
Elsevier
In the light of the adsorption difference of cationic collectors on quartz and apatite, an additional hydrogen bond functional group can be introduced into the traditional collector molecule-dodecylammoniu m acetate (DDA) to achieve high-efficient separation of minerals. In this study, a new surfactant-N-(2-hydroxy-1, 1-dimethylethyl) dodecylamine (HDMEA) was synthesized in ou r laborator y and acted as a new-type amine collector in the reverse flotation separation of apatite from quartz. The results of micro-flotation tests indicated that the separation performance of HDMEA was significantly better than that of DDA . When the concentration of HDMEA was 20 mg/L at pH 6.43, the apatite with 38.57% grade and 95.8% recover y could be achieved in mixed-flotation tests. The adsorption mechanism of DDA and HDMEA on quartz and apatite was comparably explored by the mea-surements of zeta potential , FTIR, contact angle, and AFM as we l l as the DFT calculations. These results demonstrated that improving the hydrogen bonds adsorption on quartz (by -NH-and -OH groups) and increasing the steric-hindrance effect on apatite help to achieve efficient flotation separation of quartz and apatite.
NSTL
Elsevier
