A method of suppressing splashing during converter steelmaking

Abstract

The invention relates to a method for suppressing splashing in the process of converter steelmaking. Firstly, the addition amount of steel scrap cold material and the addition of the first batch of material for blowing are determined, and at the end of the oxidation period of silicon and manganese, the range of alkalinity of steel slag is 1.4. ~1.9, MgO 5%~7% in slag, TFe 18%~24%, molten iron temperature 1390~1420℃; at the first selection point of carbon and phosphorus oxidation reaction, add calcium-containing and magnesium-containing slagging materials in batches And the iron-containing oxide cold material, at the second carbon and phosphorus oxidation reaction selection point, the steel slag basicity ranges from 2.8 to 3.5, the MgO content in the slag is 7% to 10%, and the TFe content is 15% to 20%. In the later stage of refining, the gun pressing operation is carried out. This method ensures that the process of slagging in converter blowing is compatible with the reaction process of molten iron, and makes the air permeability and viscosity of slag in the process of blowing match with the reaction rates of decarburization, desiliconization and demanganization of molten steel, and solves the problem of converter smelting. Splatter problems in steel processes.

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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