Mineral Liberation of Magnetite-Precipitated Copper Slag Obtained via Molten Oxidation by Using High-Voltage Electrical Pulses
Mineral Liberation of Magnetite-Precipitated Copper Slag Obtained via Molten Oxidation by Using High-Voltage Electrical Pulses
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DOI：
10.1007/s11663-016-0754-2
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发表时间：
2016-10-01
影响因子：
3
通讯作者：
Nakamura, Takashi
中科院分区：
文献类型：
--
作者：
Fan, Yong;Shibata, Etsuro;Nakamura, Takashi
我们提出的方法，即，在1体积%氧气下的受控熔融氧化工艺导致磁铁矿在铜冶炼炉渣中选择性沉淀，用于下游的铁分离。采用高压电脉冲法对预焙磁铁矿沉淀铜渣进行磁铁矿解离处理。通过使用激光显微镜及其图像分析来确定矿物分布;并且它揭示了100-A μ m筛下产品包含约70%的释放的矿物颗粒。该研究肯定了使用这种新的粉碎技术获得微米级颗粒的积极成果，这些颗粒通过选择性释放产生单矿物。使用磁选，铁最终能够分离成可用于特定应用的高含铁和低含铁精矿和尾矿。
Our proposed method, i.e., a controlled molten oxidation process under 1 vol pct oxygen, leads to selective precipitation of magnetite in a copper smelter slag for downstream iron separation. In the present study, the preroasted magnetite precipitated copper slag was treated via magnetite liberation, which was realized by using high-voltage electrical pulses. The mineral distribution was determined by using a laser microscope and its image analysis; and it revealed that the 100-A mu m under-sieve product contains approximately 70 pct of liberated mineral particles. The study affirms the positive outcome of using this new technology for comminution to obtain micrometer-scale particles that yield monominerals via selective liberation. Using magnetic separation, iron was capable of finally separating into high- and low-iron-bearing concentrate and tailing that can be used in specific applications.