Method for inhibiting splashing in steelmaking process of converter

Abstract

The invention relates to a method for inhibiting the splashing in a steelmaking process of a converter, which belongs to the field of converter steelmaking. The method comprises the following steps: determining an appropriate addition amount of waste steel cold material and an addition amount of first batch materials for blowing according to the temperature, components and slag content of molten iron entering the converter as well as the slag residual situation of the previous process, enabling the alkalinity range of the steel slag to be 1.4 to 1.9 when an oxidation period of silicon and manganese is ended, wherein the content of MgO in the slag is 5 to 7 percent, the content of TFe is 18 to 24 percent, and the temperature of the molten iron is 1390 to 1420 DEG C; at a first carbon / phosphorus oxidation reaction selection point, adding a slag making material comprising calcium and magnesium in different batches for multiple times as well as a cold material comprising the iron oxide, wherein at the second carbon / phosphorus oxidation reaction selection point, the alkalinity range of the steel slag is 2.8 to 3.5, the MgO content in the slag is 7 to 10 percent, and the content of TFe is 15 to 20 percent; and in the later period of the blowing, operating by virtue of a pressure gun. By adopting the method, a slag making process is ensured to be adaptive to a reaction process of themolten iron in the blowing of the converter, so that the air permeability and viscosity of the furnace slag in the blowing process can be matched with the reaction rate of carbon removal, silicon removal and manganese removal of the molten steel, and the splashing problem in the steelmaking process of the converter is solved.

Description

technical field [0001] The invention belongs to the technical field of converter steelmaking, in particular to a method for suppressing splashing during the converter steelmaking process. Background technique [0002] Sputtering is a phenomenon often encountered in the steelmaking operation of the top-blown oxygen converter. It not only interferes with the normal production operation of the converter, but also contains a large amount of metal in the splashed material, which reduces the amount of steel and increases the amount of steel. material consumption. Sputtering will occur if improper operation is performed before, during and after converter smelting. The essence of splatter is the result of the interaction and struggle of two forces. In the top-blown converter, when the content of Si and P in the molten iron is high, the content of SiO2 and P2O5 in the slag is high, and the slag amount is large, and the TFe content in the slag is high, the surface tension of the sla...

AI Technical Summary

Problems solved by technology

[0002] Sputtering is a phenomenon often encountered in the steelmaking operation of the top-blown oxygen converter. It not only interferes with the normal production operation of the converter, but also contains a large amount of metal in the splashed material, which reduces the amount of steel and increases the amount of steel. Material consumption

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