The invention relates to a method for gasifying, dephosphorizing and steel-making in a converter steel
slag furnace, and belongs to the technical field of
metallurgy. The method comprises the following steps of: first furnace
smelting: blowing gas, adding a
slag-making material into a first furnace while starting to blow, controlling
alkalinity of end-point
slag until blowing is ended, adding first
anthracite before tapping, splashing slag after tapping, gasifying, dephosphorizing and keeping all steel slag; second furnace
smelting: reducing dosage of the slag-making material by one half, keeping one half of the slag after tapping, splashing the slag, and keeping the residual steel slag; and the rest of the steps which are the same with the first furnace
smelting step; the third to the tenth furnace smelting: reducing 20-30wt% of the dosage of the slag-making material on the basis of the first furnace, keeping one half of the slag after tapping, and splashing the slag; and the rest ofthe steps which are the same with the first furnace smelting step. The method is simple, can reduce content of
phosphor in steel slag, increases steel slag circulating times, reduces
material consumption, improves converter dephosphorizing efficiency, relieves the problem that a semi-steel smelting heat source is insufficient, and reduces steel slag
discharge amount.