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| Citation: |
LI Aiqiang, ZHOU Wenbo, LI Qingqing, HUA Xuqin. Effect of Magnetization Treatment on Flocculation of Fine Grained Hematite[J]. Conservation and Utilization of Mineral Resources, 2018, (1): 84-90. DOI: 10.13779/j.cnki.issn1001-0076.2018.01.015
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Taking pure hematite minerals as the research object, the sedimentation test was conducted to investigate the influence of magnetization treatment on flocculation sedimentation of hematite.The results showed that the flocculation performance of the treated pulp and reagent with magnetization was obviously better than that of the non-magnetized pulp, which was also increased with magnetic field strength.When the magnetization time of the slurry and the magnetization of the agent was 60 min, the hematite sedimentation rate reached the maximum at 73.9% and 72.7%, respectively, which indicated the effect of magnetized slurry on the flocculation of hematite was more obvious that of magnetized reagent.The results of Zeta potential measurements showed that magnetized pulp and magnetized reagent changed the Zeta potential of hematite from -50.765 mV to -43.538 mV and -44.006 mV, respectively.Magnetization reduced the repulsive force of the electric double layer between the hematite particles and reduced the potential barrier between the particles, making the hematite particles more agglomerated and enhancing flocculation performance.Results of hematite and starch infrared spectroscopy demonstrated that there are chemical adsorption and hydrogen bonding between hematite and starch molecules.
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