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Steel desulfurizing method

A technology for molten steel and steelmaking furnace, applied in the field of metallurgy, can solve the problems of complex process and high difficulty in realization, and achieve the effect of reducing the difficulty and simplifying the desulfurization process

Active Publication Date: 2013-12-18
新方正控股发展有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, the current method of desulfurization of steel requires the construction of molten iron pretreatment equipment, which makes the process of desulfurization of steel complicated and difficult to implement

Method used

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Embodiment Construction

[0024] In the embodiment of the present invention, molten iron is subjected to electric furnace steelmaking in a steelmaking furnace to obtain molten steel; in the ladle refining furnace LF, the molten steel is desulfurized through a slag system. Since the sulfur content in the steel can be reduced in the existing steelmaking equipment without the need to build additional equipment for pretreatment of molten iron, the process of desulfurizing the steel is simplified and the difficulty of implementation is reduced.

[0025] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, the embodiment of the present invention carries out the method for desulfurizing steel comprising the following steps:

[0027] Step 101, performing electric furnace steelmaking on molten iron in a steelmaking furnace to obtain molten steel;

[0028] Step 102, desulfurize the molten steel thro...

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Abstract

The embodiment of the invention relates to the field of metallurgy, and particularly relates to a steel desulfurizing method which is used for conveniently reducing the sulfur content in steel. The steel desulfurizing method provided by the embodiment of the invention comprises the following steps of: carrying out electric furnace steelmaking on molten iron in a steelmaking furnace so as to obtain molten steel; carrying out desulfurizing treatment on the molten steel through a slag system in a ladle refining furnace (LF). The steel desulfurizing method has the advantages that the sulfur content in the steel can be reduced only by using existing steelmaking equipment without additionally building molten iron pretreatment equipment, thus the steel desulfurizing technology is simplified, and the realization difficulty is reduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for desulfurizing steel. Background technique [0002] With the rapid development of economic construction, the market has higher and higher requirements for the quality of steel. In order to improve the quality of steel, it is necessary to reduce the sulfur content in steel, especially when manufacturing ship plate steel, Z-direction steel, interstitial atom-free IF steel and pipeline steel, the requirements for sulfur content in steel are higher. [0003] At present, in order to reduce the sulfur content in steel, general iron and steel enterprises adopt the method of pretreatment of molten iron to desulfurize before the molten iron is added to the steelmaking furnace, such as: throwing method, injection method or KR (Kambara Reactor) stirring method. Desulfurization of steel by means of hot metal pretreatment needs to be carried out in hot metal pretreatment equipment. [...

Claims

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Application Information

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IPC IPC(8): C21C7/064
Inventor 周志伟俞杰
Owner 新方正控股发展有限责任公司
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