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Production method of low-carbon steel

A production method and low-carbon steel technology, applied in the manufacture of converters, etc., can solve the problems of high production cost of low-carbon steel, failure to meet the normal casting of slab continuous casting machine, and difficulty in controlling inclusions in low-carbon steel, and achieve Reduce the cost of smelting, solve the problem of abnormal casting, and benefit the stable effect of utilization rate

Active Publication Date: 2017-09-26
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to provide a production method of low-carbon steel, which mainly solves the difficulty in controlling inclusions in low-carbon steel smelted in the prior art, which cannot meet the normal casting of slab continuous casting machines and the high production cost of low-carbon steel. technical problem

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Embodiment Construction

[0017] The present invention will be further illustrated below in conjunction with specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0018] In the examples shown in Table 1 to Table 4, a 150-ton top-bottom combined blowing converter is used as an example to smelt 340CQ-1 automobile inner plate steel, and the bottom blowing gas in the converter smelting process is argon. The technical scheme includes: converter smelting, converter lower temperature tapping and deoxidation, molten steel treatment at the argon blowing station and refining molten steel at the refining furnace. The specific operation is as follows:

[0019] Table 1 converter smelting metal material parameters of the present invention

[0020]

[0021] Table 2 Converter smelting index and endpoint molten steel control parameters of the present invention

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Abstract

The invention discloses a production method of low-carbon steel. The production method mainly aims to solve the technical problems that normal pouring of a slab caster cannot be satisfied and the production cost of the low-carbon steel is high because inclusions in the low-carbon steel which is smelted by a converter are difficult to control in the prior art. According to the technical scheme, the production method comprises the following steps of performing convertor smelting, converter low-temperature tapping and deoxidation, performing molten steel treatment at an argon blowing station, and refining molten steel in a refining furnace. The molten steel produced by adopting the production method has high cleanliness, the average content of total oxygen in the molten steel is 16.5 ppm, the average content of phosphorus is 95 ppm, the content of phosphorus as a harmful element in the molten steel is greatly reduced, and the production cost of the molten steel per ton steel is reduced by 13 Yuan.

Description

technical field [0001] The invention relates to a production method of carbon steel, in particular to a production method of low-carbon steel, and belongs to the technical field of converter steelmaking. Background technique [0002] In the prior art, the treatment process of low-carbon steel molten steel in converter smelting is as follows: tapping at the end point of converter smelting at 1670-1700°C; during the alloying process of converter tapping, the molten steel is fully deoxidized, and then the top slag of the ladle is modified and deoxidized; The argon station feeds the aluminum wire to adjust the aluminum content of molten steel. There are two defects in this process: one is that the end temperature of converter smelting is high, high temperature often brings strong oxidizing molten steel, the oxygen content is generally greater than 0.065%, and the amount of slag in the tapping process increases, which is not conducive to the removal of inclusions in molten steel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/35C21C7/06
CPCC21C5/35C21C7/0006C21C7/06
Inventor 王多刚虞大俊郑毅
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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