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实验室条件下以粉煤灰、钢渣粉、选铁尾矿粉为磁性材料,研究了磁性材料的磁化性能、生产磁化复混肥的磁化工艺及肥料磁性的稳定性,并测定了磁化复混肥料的重金属含量。结果表明,磁化工艺以先造粒后磁化为佳;以选铁尾矿粉为磁性材料,在磁化场强为8 000 mT下磁化10 s生产的磁化复混肥料磁化效果最佳,且放置时间对肥料的磁感应强度影响弱;以三种磁性材料制成的磁化复混肥料的重金属含量均低于国家标准,使用安全。
Magnetization performance of magnetic materials, magnetization process of producing magnetized compound fertilizer and magnetic stability of fertilizer were studied by using fly ash, steel slag powder and iron tailing powder as magnetic materials under laboratory conditions. Fertilizer heavy metal content. The results show that the magnetization process is better after the first granulation magnetization; to iron tailings powder as the magnetic material, the magnetization compound magnetization produced by magnetization for 10 s at a magnetization field of 8 000 mT has the best magnetization effect, and the placement time The magnetic induction intensity of fertilizer is weak; the content of heavy metals in the magnetized compound fertilizer made of three magnetic materials is lower than the national standard, and it is safe to use.