Electric phenomenon of interphase movement between metallurgical refractory and molten iron
ZHANG Yuan-yuan1, HE Zhi-jun1, CHEN Wen2, YANG Xin1
1. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China; 2. Liaoning Inspection Examination and Certification Centre, Shenyang 110000, Liaoning, China
Abstract:In the process of iron and steel smelting, the interfacial effects such as wetting, dissolution and chemical reaction between the refractory and molten steel (hot metal) will be affected by the electric field existing on the interface. In order to clarify the frictional electrification behavior between molten steel (hot metal) and refractory materials caused by relative motion, a low-temperature fluid flow charging experiment and a thermal simulation experiment were carried out. It can be seen from the low-temperature fluid flow and charging experiment that as the stirring speed increased, the electrostatic voltage generated by the friction between the fluid and the graphite container gradually increased. Due to the different density, viscosity, and the number of impurities and ions in different fluids, the static electricity generated by the flow varied significantly. From the thermal simulation test, it can be seen that frictional electrification occurred between the flowing molten iron and the refractory material, and as the speed of the molten iron flow increased, the generated static electricity increased. The magnitude of static electricity generated between different types of refractory materials and flowing molten iron was different, which was related to their physical and chemical properties.
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