Abstract
Abstract. The mathematical model to determine the key local and average integral electromagnetic forces acting on the arc discharges in the threephase arc furnace has been given. There are the forces acting on the arc column, which are caused by currents fl owing through the liquid metal, the forces of the electromagnetic interaction of the arc with other arcs and currents fl owing through the graphite electrodes and the forces of the interaction of the arc with its own magnetic fi eld. Through computer simulations it is shown that in three-phase arc furnace, when the distances between the electrodes are less than 1.5 – 2.5 of the arc lengths the most signifi cant infl uence on the behavior of the electric arc and its form have the forces of the electromagnetic interaction between the currents fl owing through the arc and graphite electrodes, and at large distances the most signifi cant infl uence on the behavior of the electric arc and its form have the force of interaction of the arcs with currents fl owing through the liquid metal. It was found that average resultant electromagnetic force acting on the arc can signifi cantly defl ect it from a straight line connecting the center of the electrodes and the axis of the electrode.
Highlights
The mathematical model to determine the key local and average integral electromagnetic forces acting on the arc discharges in the threephase arc furnace has been given
There are the forces acting on the arc column, which are caused by currents flowing through the liquid metal, the forces of the electromagnetic interaction of the arc with other arcs and currents flowing through the graphite electrodes and the forces of the interaction of the arc with its own magnetic field
Through computer simulations it is shown that in three-phase arc furnace, when the distances between the electrodes are less than 1.5 – 2.5 of the arc lengths the most significant influence on the behavior of the electric arc and its form have the forces of the electromagnetic interaction between the currents flowing through the arc and graphite electrodes, and at large distances the most significant influence on the behavior of the electric arc and its form have the force of interaction of the arcs with currents flowing through the liquid metal
Summary
Ячиков И.М., д.т.н., доцент, профессор кафедры вычислительной техники и программирования ( jachikov@mail.ru ) Посредством компьютерного моделирования показано, что в трехфазной дуговой печи при расстоянии между электродами меньше 1,5 – 2,5 длины дуги наиболее существенное влияние на поведение электрической дуги и ее форму оказывают силы электромагнитного взаимодействия между токами, протекающими через дуги и графитированные электроды, а при больших расстояниях силы взаимодействия дуг с токами, протекающими через жидкий металл. Вочке определил силу сжатия дуги посредством пинч-эффекта и силу, действующую на металл в трехфазной дуговой печи со стороны тока дуги.
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