Method for reducing steel slag adhesion in ultra-low carbon steel smelting process

A technology of ultra-low carbon steel and smelting process, applied in the field of molten steel refining, which can solve problems such as the impact of molten steel quality and production efficiency

Active Publication Date: 2021-07-06
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above-mentioned patents can remove the steel slag in the hot bend pipe and the vacuum tank during the decarburization period when the steel slag adhesion is the most serious, which will still affect the quality and production efficiency of molten steel

Method used

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  • Method for reducing steel slag adhesion in ultra-low carbon steel smelting process
  • Method for reducing steel slag adhesion in ultra-low carbon steel smelting process
  • Method for reducing steel slag adhesion in ultra-low carbon steel smelting process

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Embodiment 1

[0034] The composition requirements of ultra-low carbon steel used in this embodiment are as shown in Table 1:

[0035] Table 1 Ultra-low carbon steel composition requirements

[0036]

[0037] In the production of ultra-low carbon steel in a 110t steel ladle, according to the specific carbon content in the ultra-low carbon steel, different oxygen lance control parameters are used during the decarburization period to perform oxygen blowing operation, see Table 2 for details:

[0038] Table 2 Oxygen lance control parameters

[0039]

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Abstract

The invention relates to the technical field of molten steel refining, in particular to a method for reducing steel slag adhesion in the ultra-low carbon steel smelting process. The method for reducing steel slag adhesion in the ultra-low carbon steel smelting process is provided and is limited in an ultra-low carbon steel decarburization period, different oxygen lance positions, oxygen blowing amounts and oxygen blowing time are set according to the carbon content of initial steel, CO generated in the decarburization process is combusted into CO2 by oxygen, heat generated in the combustion process is utilized to heat steel slag, steel slag adhering to the inner wall of a vacuum tank is melted, the adhesion amount of the steel slag is reduced, meanwhile, oxidation pollution caused by excessive oxygen to molten steel can be avoided, and the purity of the molten steel is guaranteed.

Description

technical field [0001] The invention relates to the technical field of molten steel refining, in particular to a method for reducing the adhesion of steel slag in the ultra-low carbon steel smelting process. Background technique [0002] With the development of the automobile industry, the demand for ultra-low carbon steel is increasing, and its quality requirements are becoming more and more stringent. Purity has become one of the important indicators to measure the quality of steel products. As an important means of smelting ultra-low carbon steel, RH vacuum treatment technology is used by many metallurgical enterprises in the refining process outside the furnace. It has the functions of decarburization, degassing, alloy fine-tuning and uniform composition and temperature. [0003] However, with the increase in the number of times the vacuum tank is used and the existence of production gaps in the smelting process, more and more steel slag adheres to the vacuum tank and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
CPCC21C7/064
Inventor 杜雪岩李树军申莹莹
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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