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Process for producing steel containing alumium low carbon low ilicon by small square blank continuous caster

A billet continuous casting, low-carbon and low-silicon technology, applied in the manufacture of converters, etc., can solve the problems of high labor intensity, many processes, and high production costs, and achieve good results

Inactive Publication Date: 2005-03-23
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ML12-20Al steel produced by this method has many processes, high labor intensity, low yield and high production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention can be implemented in iron and steel complexes. The following is the example of the third steelmaking plant of Shougang-the third wire rod plant, which adopts the present invention to produce ML15Al steel.

[0028] The process route is: hot metal desulfurization and slag removal→3rd steelmaking 80t converter smelting→slag blocking and tapping→ladle deoxidation and alloying→ladle slag modification→LF ladle refining→feeding Al wire and Ca wire→argon soft blowing at the bottom of the ladle→130mm 2 Billet casting machine → billet surface quality inspection → high-speed wire rolling mill rolling ∮ 6.5 ~ 14mm wire rod (or profile rolling mill rolling ∮ 16 ~ 25mm bar) → slow cooling after rolling → finished product packaging.

[0029] Stoves

[0030] Stoves

[0031] Stoves

[0032] Stoves

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PUM

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Abstract

The invention relates to a method of making small billet casting with low carbon, low silicon aluminium-containing steel. Its features lie in: the converter adopts the double-slag operation, controls the carbon 0.08% to 0.18% in the end and the temperature of 1640deg.C to 1680deg.C and output the steel while fencing off the slag. Final deoxidization by the Al-Mn-Fe and adding the steel of the 3.0kg / t to 5.0kg / t and 200ky to 400kg of slag into every converter. Controlling the destination degree of the oxygen less than 10ppm, according to 0.02% to 0.035% of the middle package, 0.03% to 0.05% of leaving the station after being refined, 0.002% to 0.01% of leaving the place after being refined and 0.025% to 0.038% of reaching the destination after being refined, adjusting the Ca-Si line according to 0.1 of the Ca / Si after feeding the Al. The invention can stabilize the Als between 0.02% and 0.05%.

Description

[0001] Field [0002] The invention relates to a production method of billet continuous casting ML12-20Al steel, which is especially suitable for the production of billet continuous casting low-carbon, low-silicon and aluminum-killed steel. Background technique [0003] The traditional process of domestic production of ML12-20Al steel is: converter or electric furnace smelting → pouring die-casting ingot or bloom casting machine pouring billet → blooming billet → wire rod or bar rolling mill rolling. The ML12-20Al steel produced by this method has many procedures, high labor intensity, low yield and high production cost. With the technical progress of the metallurgical industry, the traditional die-casting production process is gradually replaced by the continuous casting process, and the production cost is gradually reduced. Therefore, it is an important topic to study the production of ML12-20Al low-carbon, low-silicon and aluminum-killed steel by continuous casting process....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C7/04C22C33/04
Inventor 许晓东李永东李本海曾利王丽萍于广石刘光明
Owner SHOUGANG CORPORATION
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