A preparation method for producing ship plates using high-phosphorus, high-arsenic, and high-sulfur molten iron

Abstract

The invention relates to a preparation method for producing ship plates by using high-phosphorus, high-arsenic, and high-sulfur molten iron, comprising: (1) mixing high-P, high-S, high-As molten iron with low-S, low-As molten iron to reduce the S and As contents in molten steel; (2) ) KR desulfurization and arsenic removal, removing high S and high As slag; (3) smelting of the first slag of the converter, adding low As scrap steel, further reducing As and dephosphorization; (4) Dephosphorization of the second slag of the converter, leaving slag Tapping; (5) alloying and deoxidation during converter tapping; (6) blowing argon at the argon station, feeding aluminum wires for deoxidation; (7) LF refining deep desulfurization, dearsenization, deoxidation, and adjusting alloy components; (8) using electromagnetic Stirring and light reduction, constant casting speed, low superheat casting, reduce the aggregation and segregation of P, S, As and other elements; Effects of elements such as As on the performance of steel plates; the invention realizes the production of qualified low-temperature ship plate steel with molten iron with high P, high S and high As, and realizes low-cost manufacturing of ship plate steel.

Description

Technical field [0001] The present invention relates to the technical field of steel material, in particular, a method of preparing a high-phosphorus high arsenic high sulfur ferrous production. Background technique [0002] During the smelting production of shipbaro steel, due to the sources of iron ore, the iron water composition has a large change and affects subsequent smelting control and finished product performance, especially harmful elements P, S, and AS. The usual smelting control means only is only ≤ 0.13% of the iron water, the iron water S content is ≤0.05%. The "three high" hazardous elements, such as high P (≥0.15%), high S (0.05 ~ 0.08%). ), High AS (0.03 ~ 0.1%) of iron water, the effect is not obvious or only part of the purpose, eventually causing the steel sheet to not meet the standard, the performance is unqualified. Surface steel pairs have strict control requirements for P, S content, and higher AS will have a large impact on the quality of the shipboard a...

AI Technical Summary

Problems solved by technology

This invention aims to increase C and preserve Mn to increase residual Mn content, which is not the best solution to reduce P and S content, and cannot cope with high As molten iron

[0006] It can be seen from the above that at present, there is no existing technology at home and abroad that can properly process molten iron containing high phosphorus, high sulfur and high arsenic, and use the molten iron to produce ship plates. The steel plate whose performance meets the requirements of the ship plate is of great significance

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