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A double converter steelmaking method

A dual steelmaking and converter technology, applied in the manufacture of converters, etc., can solve the problems of difficult to achieve satisfactory product quality, affect the quality of molten steel, and difficult to solve the problem of dephosphorization in dephosphorization furnaces and increase sulfur, so as to reduce the consumption of refined lime, Enhanced smelting effect and reduced sulfur content

Active Publication Date: 2015-10-28
LAIWU IRON & STEEL GRP
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Problems solved by technology

[0008] The above-mentioned duplex steelmaking process introduces its basic process and related applications of this process. However, it is still difficult to solve the problems of dephosphorization in the dephosphorization furnace and sulfur increase in the smelting process, which affects the quality of molten steel and is difficult to achieve satisfactory products. quality

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  • A double converter steelmaking method

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Embodiment Construction

[0016] The invention will be described in more detail hereinafter with reference to exemplary embodiments of the invention, however, the invention should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0017] According to an embodiment of the present invention, a new converter double-steelmaking process is provided, which is more conducive to the dephosphorization of the dephosphorization furnace in the double-steelmaking process of the converter and the small amount of sulfur increase in the smelting process as much as possible.

[0018] According to this embodiment, a double-connected converter steelmaking method includes the following steps: pretreatment of molten iron; converter dephosphorization; It is 50-70kg / t (that is, the amount of low-sulfur iron block added to each ton...

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Abstract

The invention discloses a duplex steel making method of a converter. The duplex steel making method comprises the following steps: pretreating hot metal; dephosphorizing in the converter; decarbonizing in the converter, wherein in the dephosphorizing process of the converter, a low-sulfur briquette is added in the molten steel, and the addition amount is 50-70 kg / t. By using the duplex steel making method of the converter, disclosed by the invention, the quality of the molten steel can be improved.

Description

technical field [0001] The invention relates to a converter double-connected steelmaking method, more specifically, relates to a converter double-connected steelmaking method capable of improving the quality of molten steel. Background technique [0002] In the process of converter steelmaking, how to reduce the sulfur and phosphorus content in molten steel and improve the quality of molten steel is a technical problem to be solved in the current smelting of high-quality steel. At present, the competition in the iron and steel market is becoming increasingly fierce, and the requirements for product quality are becoming increasingly stringent. Variety steel smelting is getting more and more attention from various iron and steel enterprises, and effective control of sulfur and phosphorus content in molten steel is one of the main ways to improve the level of smelting variety steel. As one of the methods to achieve high-quality steel smelting, the duplex steelmaking method play...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/28C21C7/064
Inventor 郭伟达张佩温福新毕永杰王明杰沈彬彬于亮涛王强胡增跃
Owner LAIWU IRON & STEEL GRP
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