Smelting method of converter efficient dephosphorization
A smelting method and converter technology, which is applied in the field of iron and steel metallurgy, can solve the problems of not being able to effectively improve the dephosphorization efficiency of the converter, and cannot reduce the phosphorus content and cost at the end of the converter, and achieve low cost, low phosphorus content, and improved dephosphorization efficiency. Effect
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[0012] see figure 1 The embodiment of the present invention provides a high-efficiency converter dephosphorization smelting method, which is mainly used for smelting molten iron with a mass fraction of phosphorus of 0.080-0.200%, and finally reaching steel grades with a mass fraction of phosphorus of less than 0.010% in the finished product. Suitable for 180-250 ton converters, the smelting method includes the following steps:
[0013] Step 1, carry out slag splashing to protect the furnace, and pour out the residual slag.
[0014] Step 2, adding pre-melted slag into the furnace.
[0015] Step 3: Carry out converter blowing for 4-5 minutes, and the oxygen lance position and oxygen supply intensity are dynamically adjusted according to the blowing time.
[0016] Step 4, carry out the slag dumping operation.
[0017] Step 5: Carry out slagging and blowing, and control the basicity R of slag, the mass fraction of magnesium oxide and the mass fraction of ferrous oxide at the en...
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