A low-cost production method of low-carbon enamelled steel

A production method, enamelled steel technology, is applied in the low-cost production field of low-carbon enameled steel, which can solve the problems of high production cost, achieve the effects of simplifying the production process, reducing production cost, and easy to control the production rhythm

Active Publication Date: 2021-05-07
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-cost production method of low-carbon enamelled steel, which mainly solves the technical problem that low-carbon enameled steel must adopt RH furnace vacuum refining process and high production cost in the prior art; the method of the present invention solves the current It is difficult to produce qualified low-carbon enamelled steel with the LF furnace refining process, which reduces the cost of low-carbon enameled steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, the steel output of the converter is 271.9t, the weight content of carbon in the steel is 355ppm, and the weight content of oxygen is 639ppm; %, blow argon at the bottom of the ladle, heat up to the target temperature; then feed aluminum wire, add 362kg of ferrotitanium, switch the gas blowing at the bottom of the ladle from argon to nitrogen, blow nitrogen and stir for 10 minutes to obtain the finished molten steel, and the carbon in the finished steel The weight content of nitrogen is 301ppm, and the weight content of nitrogen is 36.4ppm.

Embodiment 2

[0018] Example 2, the steel output of the converter is 272.6t, the weight content of carbon in the steel is 326ppm, and the weight content of oxygen is 780ppm; the weight content of nitrogen in the molten steel entering the LF furnace is 17.9ppm, and the weight percentage of Alt is 0.0079% , heated up to the target temperature; then feed the aluminum wire, add 361kg of ferrotitanium, blow nitrogen and stir for 8 minutes to obtain the finished molten steel, the weight content of carbon in the finished steel is 360ppm, and the weight content of nitrogen is 43.8ppm.

[0019] See Table 1 for the nitrogen content (by weight percentage) in molten steel in the examples of the present invention.

[0020] Table 1 Nitrogen content in molten steel of the embodiment of the present invention, unit: weight percent.

[0021] category Nitrogen in molten steel at the end of converter smelting Nitrogen in LF in molten steel Nitrogen in finished steel Example 1 0.0011 0.001...

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PUM

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Abstract

The invention discloses a low-cost production method of low-carbon enamelled steel, which mainly solves the technical problems in the prior art that the low-carbon enameled steel must adopt the RH furnace vacuum refining process and the production cost is high. The technical solution of the present invention is: a low-cost production method of low-carbon enamelled steel, comprising: using a top-bottom combined blowing converter for smelting, the mass percentage of the main metal raw material is 75% to 100% of molten iron, and the balance is scrap steel; The control of the converter smelting end point is to detect the w[C] and temperature of the molten steel at the converter blowing end point; the steel is tapped immediately after the converter blowing end; the molten steel in the ladle is transported to the LF furnace for the regulation of the molten steel temperature and the composition of the molten steel. The low-carbon enamel steel produced by the method of the invention has low cost, and compared with the existing RH furnace vacuum refining process, the production cost is 20 yuan / ton steel lower.

Description

technical field [0001] The present invention relates to a production method of low-carbon enamel steel, in particular to a low-cost production method of low-carbon enamel steel; in particular, it relates to a production method for regulating carbon and nitrogen elements in low-carbon enamel steel by adopting LF furnace technology , belongs to the technical field of steel smelting and continuous casting. Background technique [0002] Low-carbon enamel steel is enamel enamel on the surface of the steel plate to prevent the steel plate from rusting, so that the steel plate will not form an oxide layer on the surface when it is heated and resist various liquids. It is widely used in eating utensils and washing utensils used in daily life. In order to prevent defects such as pinholes, bubbles, "lin burst" and product deformation of low-carbon enamelled steel at high temperatures, it is necessary to precisely control the carbon content of the finished product; at the same time, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/35C21C7/00C21C7/06C21C7/072C22C38/02C22C38/04C22C38/14
CPCC21C5/35C21C7/0006C21C7/06C21C7/072C22C38/001C22C38/02C22C38/04C22C38/14Y02P10/20
Inventor 刘相林夏富春孙玉军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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