The advantages of using lime stone instead of lime for steel making
After being put into the converter, lime stone can resolve oxidizing
CO2, which can strengthen oxygen supply in furnace in the initial stage.
The resolve of lime stone can sustain a long time low termperature on
the slag-iron interface, which is good for the dephosphorization of
liquid iron at the early stage of converting.
3. Lime has the highest
activity in the moment of its generation, which is the ideal activated
lime raw material, at this very moment, when lime is in touch of slag,
the deslagging speed will be improvded.
4. Lime stone has bigger
specific gravity, even if the lump is small, it won't be taken out by
the air in the converter. After goes into the furnace, by the effect of
sudden heating, it will crack and surface area will be bigger, melting
and deslagging speed will be improvded.
5. The calcium carbonate in
lime stone can be fully utilized, after resolving, CaO will participate
in slag forming, CO2 will participate in the oxidation reaction in
converter, the CO that is generated can be recycled.