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Method for smelting suprelow carbon steel using ordinary arc furnace

An ultra-low carbon steel and electric arc furnace technology, applied in the field of ultra-low carbon steel smelting, can solve the problems of reduced service life of the electric arc furnace, no technical enlightenment found, electric arc furnace damage, etc., and achieves extended service life, shortened oxidation time, reduced Effect of smelting cost

Inactive Publication Date: 2009-04-08
BENXI IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the very low requirements for non-metallic content such as carbon and phosphorus in ultra-low carbon blade steel, and the ultra-low carbon steel is smelted by the return method, in order to make the carbon meet the requirements, a high-temperature oxidation and decarburization process is adopted, and the temperature can reach Above 1800℃, and high-temperature steelmaking not only wastes energy, but also causes great damage to the electric arc furnace, resulting in a reduction in the service life of the electric arc furnace. Therefore, in the prior art, the return method is usually used to smelt stainless steel. So far, There is no technical inspiration for smelting ultra-low carbon steel by using the return method, especially the technical inspiration for using ordinary electric arc furnaces to smelt ultra-low carbon steel by the return method

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0013] This embodiment is only a detailed description of the EBT electric arc furnace. Referring to this embodiment, there is no obstacle for those skilled in the art to use other types of ordinary electric arc furnaces to smelt ultra-low carbon steel. The EBT electric arc furnace has a furnace shell with a furnace chamber and a furnace cover for covering the upper surface of the furnace chamber. Before using this type of electric arc furnace to smelt ultra-low carbon steel, the furnace chamber of the furnace Magnesia bricks or fused bricks are used to transform the electric arc furnace into a carbon-free inner wall. When smelting, first add 1000-1500Kg of dephosphorization agent into the electric arc furnace (the amount of dephosphorization agent can be determined according to the phosphorus content of low phosphorus steel and returned steel), and then put low phosphorus steel and Return to the steel and make the weight ratio between the two 1:1.5. When the electric arc furn...

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Abstract

The invention discloses a smelting method of hyperlow-carbon steel in the common arc furnace, which comprises the following steps: loading; stripping phosphor under low temperature; stripping carbon under high temperature; sampling. The invention shortens the oxidizing time by one third, which can recycle heavy metal effectively.

Description

Technical field: [0001] The invention relates to a method for smelting ultra-low carbon steel by using an ordinary electric arc furnace. Background technique: [0002] Ordinary electric arc furnace refers to the electric arc furnace with eccentric bottom tapping, like the EBT electric arc furnace called in the industry. This kind of electric arc furnace is a metal smelting furnace designed for smelting ordinary steel. The lower mid-block magnesia carbon brick masonry. When using this kind of electric arc furnace to smelt metal, because the furnace lining is subjected to the arc radiation of the electrode and the erosion of the slag, it is easy to continuously separate the carbon contained in the brick, so that the carbon in the molten steel cannot be removed. The electric arc furnace cannot smelt ultra-low carbon steel, especially the German steel grade X5CrNiCuNb16-4 blade steel cannot be smelted with this electric arc furnace; at the same time, because the carbon containe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52C21C7/064C21C7/068F27B3/08
CPCY02P10/20
Inventor 王继伟张万发常志宏王继晨
Owner BENXI IRON & STEEL GROUP