Deoxidation method of low-carbon wire drawing steel Q195LB

Abstract

The invention relates to the technical field of external refining of steel-making furnaces, in particular to a deoxidation method of low-carbon wire-drawing steel Q195LB, which can be used for accurately determining silicon loss aiming at different argon blowing flows and power transmission time lengths according to the argon blowing flows (the exposed diameter of molten steel) and the power transmission time lengths (the length of an electric arc). And according to the specific silicon loss amount, silicon iron powder with the corresponding amount is added, accurate silicon deoxidation is achieved, the target oxygen value is stably reached, and accurate and reliable deoxidation is achieved.

Description

technical field [0001] The invention relates to the technical field of out-of-furnace refining in steelmaking, in particular to a deoxidation method for low-carbon wire-drawing steel Q195LB. Background technique [0002] When producing low carbon welding wire steel, regardless of top suction or side suction, LF refining and slag making generally use ferrosilicon powder to diffuse and deoxidize the slag surface, and increase the thickness of the slag layer to create white slag and maintain the submerged arc effect throughout the refining process. However, increasing the amount of slag will not increase the foaming ability of the slag and increase the cost of the slag material. The deoxidation of ferrosilicon powder is easily involved in the molten steel to increase silicon, and the ferrosilicon powder cannot fully reduce FeO+MnO in the slag when the slag is foamed. , it is easy to cause incomplete reduction of oxides in the slag. When the LF is refined, as the temperature ris...

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Problems solved by technology

[0002] When producing low-carbon welding wire steel, regardless of top suction or side suction dust removal, LF refining slag generally uses ferrosilicon powder to diffuse and deoxidize the slag surface, and increases the thickness of the slag layer to create white slag and maintain the submerged arc effect of the entire refining process , but increasing the amount of slag will not increase the foaming ability of slag and increase the cost of slag material. Ferrosilicon powder deoxidation is easy to be involved in molten steel to increase silicon, and ferrosilicon powder cannot fully reduce FeO+MnO in slag when slag foams. , it is easy to cause incomplete reduction of oxides in the slag. When LF is refined, as the temperature rises, the oxygen in the slag returns to the molten steel, causing secondary oxidation of the molten steel, resulting in high total oxygen in the steel.

[0003] Relevant technologies are difficult to accurately and reliably deoxidize

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