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The technical parameters of the submerged arc furnace are also one of the important factors affecting the life of the lining refractory. Therefore, it is very important to properly arrange the electrode of the kiln, the diameter of the kiln shell and the secondary voltage.
1, the impact of the diameter of the heart circle
The diameter of the center circle is an important process parameter for electric furnaces. If the size is too small, the power density of the center circle will be too large, and the high temperature heat is too concentrated in the center circle area, so that the temperature is too high, the furnace bottom is eroded, the consumption is fast, and the life of the lining is shortened; if the size is too large, the center of the circle The power will be low, the temperature at the edge of the molten pool will be too high, the slag iron will intensify the erosion of the furnace wall, the furnace wall will become thinner, and the furnace wall burning accident will occur, and the life of the lining will also be shortened. Therefore, the proper diameter of the center of the circle can effectively control the temperature in the center of the circle and the wall of the furnace, and reduce the erosion of the furnace bottom and the furnace wall by the temperature and heat, which is the main factor affecting the service life of the furnace lining.
2, the influence of the diameter of the furnace shell
The furnace shell diameter is also the main process parameter of the electric furnace. Whether the choice of furnace parameters is reasonable and whether it matches the parameters of the core circle not only affects the technical specifications of the production, but also affects the service life of the lining. If the diameter of the shell and the diameter of the core circle, the distance between the pole wall and the thickness of the furnace wall match , the life of the lining will be extended accordingly; conversely, if the diameter of the furnace shell does not match the diameter of the core circle, if the diameter of the furnace shell is too large, not only the refractory material is wasted but also the furnace is affected; and if the diameter of the furnace shell is too small, the wall spacing is too small. If it is too small or the furnace wall is too thin, it will not be resistant to erosion, and the life of the lining will be shortened accordingly. This is an important cause of the short service life of the lining.
3. Influence of secondary voltage on furnace lining
The secondary voltage is another important process parameter for the electric furnace. The secondary voltage should be matched to the diameter of the pole circle to extend the life of the lining. When the diameter of the center circle is constant, when the secondary voltage used is low, the arc of the electrode is short, the depth is deep, and the bottom of the furnace is close to the bottom of the furnace, which causes the temperature of the bottom of the corresponding center of the circle to be too high, and the thermal erosion of the bottom of the furnace Increase, so that the bottom of the furnace forms a "pot bottom" and consumes too fast. Conversely, the bottom temperature is low, the slag temperature is high, and the excessive temperature makes the slag fluidity increase, the erosion of the furnace wall is intensified, and the furnace wall becomes thin and extremely easy. The furnace wall burn-through accident occurs, which affects the life of the lining. Because the secondary voltage is relatively stable relative to a certain smelting variety, the influence on the lining is relatively stable.
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