Control method and system for steelmaking process of electric arc furnace through preheating type oxygen gun

Abstract

The invention belongs to the technical field of electric arc furnace steelmaking, and provides a control method for the steelmaking process of an electric arc furnace through a preheating type oxygen gun. The method comprises the steps that the melting process of the electric arc furnace is decomposed into a plurality of melting stages; the melting stage of the melting process of the electric arc furnace is judged; in each melting stage, the oxygen flow and the oxygen temperature are adjusted in a time frame divided manner, and the oxygen jet flow oxidizability and the impact stirring capacity are independently controlled; the adjusting range of the oxygen flow ranges from 100 Nm<3> / h to 4000 Nm<3> / h, and the adjusting range of the oxygen temperature ranges from 25 DEG C to 500 DEG C; and the method has the beneficial effects that compared with a traditional method, the oxygen jet flow has the more excellent jet flow characteristic, the oxygen utilization rate is improved by 2% to 5%, the decarburization rate is quickened, the decarburization time is shortened by more than 1 min, TFe of final slag is reduced by more than 2%, consumption of steel materials is reduced by more than 5 kg / t, the obvious optimization effect and obvious economic benefits are achieved, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of electric arc furnace steelmaking, and in particular relates to a steelmaking process control method and system using a preheating oxygen lance in an electric arc furnace. Background technique [0002] At present, the oxygen supply of electric arc furnace steelmaking is mainly completed through the oxygen lance located above the molten pool. The oxygen lance nozzle adopts the Laval nozzle structure to generate supersonic jet flow, and uses the kinetic energy of oxygen jet to penetrate the furnace gas and slag layer and molten steel. touch and react. [0003] The supersonic oxygen jet produced by the oxygen lance of the electric arc furnace is blown into the molten pool, on the one hand, it provides the oxygen required for the oxidation of the molten pool, and on the other hand, it provides the stirring work required for the stirring of the molten pool; Stirring work requirements are different, and reasona...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a steelmaking process control method and system using a preheating oxygen lance in an electric arc furnace, which solves the problem of single oxygen supply parameters and low oxygen consumption in the existing electric arc furnace steelmaking production. The problem that the jet oxidation ability and impact stirring ability cannot be independently controlled, based on the process requirements of different smelting stages, the oxygen supply flow and oxygen temperature are adjusted in time intervals to realize the independent control of the oxygen jet oxidation ability and impact stirring ability, and improve the efficiency of electric arc furnace smelting. High efficiency and oxygen utilization efficiency, reducing energy consumption and metal material consumption

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