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In this paper, we propose an array sensing detection method for smelting of submerged arc furnaces (SAF) based on electromagnetic radiation. AC magnetic field generated by electrode currents and molten currents in the furnace is reflected outside of the furnace. According to the spatial distribution of electromagnetic field a radiation model of SAF is built. We design a 3D magnetic field sensing array system in order to collect the magnetic field information. Through the collected information, the current distribution characteristics of SAF are described and the key parameters of smelting are obtained. Theoretical simulation and field test show that the curves acquired by the sensing array can accurately reflect the information of the relative displacement when the relative displacement between the array and electrode is 10 ㎝. Compared with the detection method of 3D single point, the proposed array sensing method of magnetic field obtains better results in terms of realtime and accuracy, and has good practical value for industrial measurement.

Array Sensing Using Electromagnetic Method for Detection of Smelting in Submerged Arc Furnaces