Physical Modeling of Slag Penetration on the Refractories in a Static Magnetic Field

摘要

Alumina based refractory is the important lining material in the process of steelmaking, and slag corrosion is one of the main forms of refractory wear. Electromagnetic field will affect the interface behaviour between refractories and molten slag because the molten slag has certain conductivity, meanwhile the wettability between refractories and molten slag is an important factor affecting slag corrosion. Therefore, a method of simulation experiment at room temperature was adopted, in which the molten slag was simulated by saturated NaCI solution composite, and alumina and resin materials were selected to simulate refractories in the static magnetic field, the effect of magnetic flux density on the slag penetration was investigated. The results showed that the effective electromagnetic damping formed in the static magnetic field, which can prevent the penetration of the molten slag to refractory materials. The higher the magnetic flux density is, the shallower the penetration will be, and the weaker the electrophoretic effect is. Furthermore, the inhibitory effect of slag penetration to the smaller pores is more obvious in the static magnetic field with same magnetic flux density. It is indicated that a static magnetic field can effectively regular or control the interface behaviour between refractory and molten slag to prolong the service life of refractories.