Determination of dielectric properties of titanium carbide fabricated by microwave synthesis with Ti-bearing blast furnace slag

Peng Liu^1,2,3,4，Li-bo Zhang^1,2,3,4，Bing-guo Liu^1,2,3,4，Guang-jun He^1,2,3,4,5，Jin-hui Peng^1,2,3,4，Meng-yang Huang⁶

1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology2. Yunnan Provincial Key Laboratory of Intensification Metallurgy3. National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology4. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology5. Faculty of Science, Kunming University of Science and Technology6. Yunnan Energy Research Institute Co., Ltd.

摘 要：The preparation of functional material titanium carbide by the carbothermal reduction of Ti-bearing blast furnace slag with microwave heating is an effective method for valuable metals recovery; it can alleviate the environmental pressure caused by slag stocking.The dynamic dielectric parameters of Ti-bearing blast furnace slag/pulverized coal mixture under high-temperature heating are measured by the cylindrical resonant cavity perturbation method.Combining the transient dipole and large π bond delocalization polarization phenomena, the interaction mechanism of the microwave macroscopic non-thermal effect on the titanium carbide synthesis reaction was revealed.The material thickness range during microwave heating was optimized by the joint analysis of penetration depth and reflection loss, which is of great significance to the design of the microwave reactor for the carbothermal reduction of Ti-bearing blast furnace slag.

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