External refining method capable of increasing continuous casting heats of ultra-deep drawing cold-rolled enamel steel

A technology for refining and enamelling steel outside the furnace, applied in the field of steelmaking, can solve the problems of restricting the release of production capacity of steel mills, improving production efficiency, production interruption, poor pourability, etc., achieving significant economic benefits, accurately controlling nitrogen content, and improving continuous production. The effect of the number of continuous casting furnaces

Active Publication Date: 2019-09-27
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to metallurgical principles, continuous casting of this type of steel has poor pourability, and the casting process is prone to accumulating flow and interrupt production, which seriously restricts the release of production capacity and the improvement of production efficiency in steel plants.

Method used

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  • External refining method capable of increasing continuous casting heats of ultra-deep drawing cold-rolled enamel steel
  • External refining method capable of increasing continuous casting heats of ultra-deep drawing cold-rolled enamel steel
  • External refining method capable of increasing continuous casting heats of ultra-deep drawing cold-rolled enamel steel

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Embodiment 1

[0027] An out-of-furnace refining method for increasing the number of continuous casting furnaces for ultra-deep-drawing cold-rolled enamel steel, including the following steps:

[0028] (1) Converter smelting. The composition of the molten steel in the converter is qualified, and when the end temperature of the molten steel reaches the target, the tapping temperature is shown in Table 1.

[0029] Table 1 Converter tapping temperature table

[0030] Furnace numberABCDE Steel tapping temperature / ℃16981695169716921690

[0031] (2) Lime is added during the tapping of the converter. During the lime addition, the bottom of the ladle is opened and argon is blown. After the lime is melted, the bottom is closed. The amount of lime added and the flow rate of argon are shown in Table 2.

[0032] Table 2 The amount of lime added and the argon flow rate during the tapping period of the converter

[0033]

[0034] (3) The amount of slag under the control of the converter is shown in Table 3. ...

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Abstract

The invention discloses an external refining method capable of increasing continuous casting heats of ultra-deep drawing cold-rolled enamel steel. The external refining method comprises the following steps: smelting molten iron and waste steel into primarily molten steel; performing first-step modifying on steel ladle slag in an alloy fine-tuning station process; performing decarburization and nitrogen pickup after RH molten steel is circulated, starting to measure oxygen before decarburization starts, adding aluminum particles to perform deoxidizing and alloying after decarburization is ended, and adding a steel ladle slag modifying agent to perform secondary modifying after performing RH vacuum-breaking. The external refining method disclosed by the invention increases continuous casting heats of ultra-deep drawing cold-rolled enamel steel to five-heat casting from three-heat casting with an increase rate of 66.7%, realizes batch, efficient and stable production of ultra-deep drawing cold-rolled enamel steel, and has remarkable economic benefits.

Description

Technical field [0001] The invention belongs to the technical field of steelmaking, and specifically relates to an out-of-furnace refining method for increasing the number of continuous casting furnaces for ultra-deep drawing cold-rolled enameled steel. Background technique [0002] Enamel products are generally formed by stamping a steel plate into a base blank, and then enamelling and sintering the surface of the base blank. Ultra-deep-drawing cold-rolled enamel steel has both excellent stamping performance and anti-scaling performance. It can meet the needs of the production of enamel products with complex shapes, difficult stamping, and high enamel quality. Its composition characteristics are ultra-low carbon, high sulfur, With high nitrogen and high titanium, with the advancement of smelting technology, composition control is no longer a difficulty restricting ultra-deep drawing cold-rolled enameled steel. According to metallurgical principles, this steel grade has poor pou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C38/02C22C38/04C22C38/06C22C38/14C22C38/16C21C7/00C21C7/06C21C7/068C21C7/10
CPCC21C7/0006C21C7/06C21C7/068C21C7/10C22C33/06C22C38/001C22C38/002C22C38/004C22C38/02C22C38/04C22C38/06C22C38/14C22C38/16
Inventor 李应江邓勇胡晓光李宝庆张宜谢大为夏序河王欢熊华报张正群张雷杨明
Owner MAANSHAN IRON & STEEL CO LTD
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