Abstract

To effectively separate and recover the valuable elements iron and boron from ludwigite, this study investigated the magnetic properties and the magnetic separation efficiency. And the reactivity of boron component in the B-bearing tailing was studied. The results indicated that the saturation magnetization of ore samples was increased with the increase of microwave power and heating time. Under condition of 40 s with 4 kW, the saturation magnetization of ore samples increased from 12.73 emu/g for the raw ore to 24.70 emu/g for the treated ore, an increased of 94.03%. After magnetic separation, the grade and recovery rate of iron in the iron concentrate and the boron grade in the tailing for the treated sample with 4 kW for 40 s were increased by 19.74%, 31.46% and 86.46% in comparison with those of the untreated ore. The sample was heated to 600 °C at 4 kW and held for 20 min, the reactivity of boron component in the B-bearing tailing reached 86.68 wt%, which increased by 34.01% compared with that of the raw ore and 4.43% compared with that of the optimal traditional roasting value at 700 °C for 2 h, indicating that the roasting temperature and time were obviously decreased and the reactivity was significantly improved by the microwave radiation.

摘要

为了有效地从路德维希矿中分离和回收有价元素铁和硼，本研究调查了磁性能和磁分离效率。并对含B尾矿中硼组分的反应性进行了研究。结果表明，随着微波功率和加热时间的增加，矿石样品的饱和磁化强度增加。在4 kW 40 s条件下，矿石样品的饱和磁化强度从原矿的12.73 emu/g提高到处理矿石的24.70 emu/g，提高了94.03%。经磁选后，4 kW 40 s处理后的铁精矿铁品位和回收率和尾矿硼品位比未处理样品分别提高了19.74%、31.46%和86.46%。矿石。