During the process of steel making, the
operating methods have great influence on AOD furnace lining.
The motion path of gas come from side gas
gun is like a parabola. There is a highest point of the parabola, after the
point, the gas begins to fall down, and then the lining will be scoured heavily
by the gas. Therefore, during the blowing, the furnace body should lean at an
angle of 6-8°.
Besides, controlling gas pressure and
blowing amount of inner and outer gas gun is quite important for stable
operation. Improper control, abnormal growing of umbrella shaped things because
of overcooling, and rise of back pressure are essential elements for control.
As fire point is too close to the side wall, it will lead to overheat of place
around tuyere, and finally bring about trumpet-shaped melting loss of
refractories.
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