How to design refractory AOD furnace molten pool?

Among all kinds of refractory furnace, for the design of AOD molten pool, it is better to choose flat molten pool. The flat kind has been proved to be the best one according to the past experience.

One special feature of the flat molten pool is that its furnace bottom conic section is short and its ratio of molten pool diameter to height is big, D/H is not less than 2.2, while in conventional AOD design, D/H is always no more than 2. It is also proved that relatively flatter molten pool has great effect on metallurgical properties of the furnace, especially for its decarbonization function. What’s more, it has the following four refractory advantages for using flat molten pool.

1. It can reduce CO partial pressure in bubble surface, speed up decarbonization and improve the efficiency by 15%.

2. Shorter blowing and converting time.

3. Lessen consumption of reductive silicon.

4. Lower refractories cost due to no backpack.