Taking pure hematite minerals as the research object, the sedimentation test was con-ducted to investigate the influence of magnetization treatment on flocculation sedimentation of hema-tite. The results showed that the flocculation performance of the treated pulp and reagent with mag-netization 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 perform-ance. Results of hematite and starch infrared spectroscopy demonstrated that there are chemical ad-sorption and hydrogen bonding between hematite and starch molecules.%以赤铁矿纯矿物作为研究对象,通过沉降试验来考察不同方式的磁化处理作用对赤铁矿絮凝沉降行为的影响.结果表明:矿浆和药剂在经过磁化处理后,絮凝效果明显优于未经过磁化处理的絮凝效果,且磁场强度越高絮凝效果越好;在矿浆磁化和药剂磁化为60 min时赤铁矿沉降率达到最大值,分别为73.9%和72.7%,磁化矿浆比磁化药剂对赤铁矿絮凝的效果好;磁化矿浆和磁化药剂两种不同磁化处理方式下的赤铁矿颗粒Zeta 电位测量结果表明,磁化处理会改变赤铁矿颗粒的 Zeta 电位,分别从 -50.765 mV 减小至-43.538 mV和-44.006 mV;磁化处理降低了赤铁矿颗粒间双电层排斥力,降低颗粒间的势能垒,使赤铁矿颗粒更易于聚团,絮凝效果增强;赤铁矿与淀粉红外光谱研究结果表明,赤铁矿与淀粉分子间存在着化学吸附和氢键作用.
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