Process for smelting aluminum containing steel through calcium carbide deoxidation

Abstract

The invention belongs to a steelmaking process in the metallurgy field and relates to a process for smelting aluminum containing steel through calcium carbide deoxidation without the aluminum deoxidation in the whole process. The process belongs to a production process that the converter steel tapping deoxidation system and the slagging system are optimized, aluminum wires are fed behind a converter, the aluminum in molten steel is regulated, the LF (ladle furnace) calcium carbide and aluminum wire deoxidation slagging is carried out, and in addition, the LF aluminum wire feeding is matched for finely regulating the aluminum in molten steel. The characteristics of calcium carbide and aluminum wires are utilized, and the diffusive deoxidation and the bulk deoxidation in the smelting process are fully and reasonably combined. The process has the advantages that the converter steel tapping deoxidation is stable, the LF slagging desulfurization effect is obvious, the casting blank quality is good, the flaw detection qualified rate of steel plates is high, the aluminum consumption of each ton of steel in the aluminum containing steel production is reduced by about 0.80kg, and the economic benefit of the aluminum containing steel production is greatly improved.

Description

technical field [0001] The invention belongs to a steelmaking process in the field of metallurgy, in particular to a calcium carbide deoxidation smelting aluminum-containing steel process that does not require aluminum deoxidation throughout the process. Background technique [0002] The deoxidation system in the smelting process is the key process for producing high-quality steel. As the most common active deoxidizer in the steelmaking process, aluminum is widely used in major steelmaking plants. Especially in the production of aluminum-containing steel, aluminum is used not only as a deoxidizer, but also as one of the alloying elements in molten steel, resulting in the consumption of about 2kg of aluminum per ton of steel in the production process of aluminum-containing steel, which increases production costs and reduces The economic benefits of steel manufacturers. With the fluctuations in the steel market, reducing production costs has become the main way for various st...

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Problems solved by technology

[0003] The purpose of the present invention is to break through the restrictive links that require aluminum and reduce aluminum in aluminum-containing steel, reduce the aluminum consumption of aluminum-containing steel per ton of steel and reduce the aluminum consumption per ton of steel without affecting the quality of cast billet, and solve the problem of aluminum-containing steel. The outstanding problem of high aluminum consumption in steel production

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