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Automatic steelmaking and slag-leaving operation method for converter

An operation method and technology of slag retention, applied in the manufacture of converters, etc., can solve the problems of converter material balance and heat balance without theoretical or empirical reference, automatic steelmaking model is difficult to calculate accurately, and the amount of slag remaining cannot be determined, etc. Achieve the effect of improving economic and technical indicators, improving converter production efficiency, and improving dephosphorization effect

Active Publication Date: 2014-04-02
新余钢铁股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the specific amount of slag remaining in the slag operation cannot be determined, and the slag condition of each furnace is also different, there is no ready-made theoretical or empirical reference for the influence on the material balance and heat balance of the converter, and it is difficult to accurately calculate the automatic steelmaking model
Therefore, the current automated steelmaking abandons the operation of slag retention because of its adverse impact on the hit rate of automatic steelmaking

Method used

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  • Automatic steelmaking and slag-leaving operation method for converter
  • Automatic steelmaking and slag-leaving operation method for converter
  • Automatic steelmaking and slag-leaving operation method for converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) The secondary computer system collected 12.5% ​​of FeO in the slag and 0.65% of Si in the molten iron in the lower furnace;

[0032] (2) The smelting steel grade is X60, and the secondary computer system sets an end point carbon target of 0.06%;

[0033] (3) According to 12.5% ​​FeO content in the slag, add 200kg of modifier for slag conditioning, or add 100kg or 300kg according to the situation, splash the slag for 5 minutes;

[0034] (4) According to the molten iron [Si] 0.65%, the system automatically matches the corresponding slag retention mode 1. The system prompts to select the slag retention amount between 2 to 4 tons, and the conventional slag retention amount is 3 tons, or 2 tons or 4 tons according to the situation. ;

[0035] (5) The end point carbon target is 0.06%, the system automatically matches the corresponding group number 15, and extracts the corresponding execution parameters;

[0036] (6) The static model performs related calculations, automatically gen...

Embodiment 2

[0038] (1) The secondary computer system collects 20.0% FeO content in the slag and 0.45% Si content in the molten iron in the lower furnace;

[0039] (2) The smelting steel grade is Q345B, and the secondary computer system sets the end point carbon target of 0.12%;

[0040] (3) According to the FeO content in the slag 20.0%, add 400kg of modifier for slag conditioning, or add 310kg or 500kg according to the situation, splash the slag for 7 minutes;

[0041] (4) According to the molten iron [Si] 0.45%, the system automatically matches the corresponding slag retention mode 2. The system prompts to select the slag retention> 4~8 tons, and the conventional input slag retention is 6 tons, or choose 4.1 tons or 8 according to the situation. Ton;

[0042] (5) The end point carbon target is 0.12%, the system automatically matches the corresponding group number 30, and extracts the corresponding execution parameters;

[0043] (6) The static model performs related calculations, automatically ge...

Embodiment 3

[0045] (1) The secondary computer system collects 30.0% FeO content in the slag and 0.28% Si content in the molten iron;

[0046] (2) The smelting steel grade is 08Al, and the secondary computer system sets the end point carbon target of 0.04%;

[0047] (3) According to the FeO content in the slag 30.0%, add 600kg of modifier for slag conditioning, or add 510kg or 700kg according to the situation, and splash the slag for 10 minutes;

[0048] (4) According to 0.28% of the molten iron [Si], the system automatically matches the corresponding slag retention mode 3. The system prompts to select the slag retention> 8-12 tons, and the conventional input slag retention is 10 tons, or select 8.1 tons or 12 according to the situation Ton;

[0049] (5) The end point carbon target is 0.04%, the system automatically matches the corresponding group number 33, and extracts the corresponding execution parameters;

[0050] (6) The static model performs related calculations, automatically generates smel...

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Abstract

The invention discloses an automatic steelmaking and slag-leaving operation method for a converter. The method comprises the following steps: (1) collecting the FeO content, and lower furnace molten iron ingredients in an end-point slag of the furnace by a secondary computer system; (2) adding a modifier for regulating the slag according to the FeO content in the slag, and protecting the furnace by slag splashing, wherein the slag splashing time is over 5 minutes; (3) determining the residual sludge amount according to the content of the lower furnace molten iron [Si], and automatically matching corresponding residual slag mode number by the system; (4) automatically matching an execution parameter of a corresponding end-point carbon target value according to the residual slag mode number and the residual slag mode group number subdivided by the corresponding end-point carbon target value; (5) carrying out related calculation on a secondary system steelmaking model, automatically generating an oxygen smelting step and a charging list, and transmitting to a primary system to implement. By adopting the automatic steelmaking and slag-leaving operation method, large splashing when the molten iron is blended can be effectively prevented, automatic steelmaking under the residual slag mode is achieved, consumption of a solvent and a steel material is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a converter automatic steelmaking operation method, in particular to a converter automatic steelmaking operation method for leaving slag. Background technique [0002] The slag operation of the converter can reduce the consumption of flux and steel materials, and can quickly form slag in the early stage of blowing, which is conducive to improving production efficiency, so there is great potential for development and application. However, the slag operation of the converter is prone to large splashes at the moment of adding molten iron, which is unsafe, thus limiting its application. Especially for the converter using automatic steelmaking, the operation is more difficult. Converter automatic steelmaking is a new steelmaking technology that controls the operation of the converter steelmaking process through the computer secondary system. This technology is based on the composition, temperature, loading and Scrap steel, iron bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/36
Inventor 冯小明赵和明王国文林文辉付军邹锦忠张邹华孙乐飞黄文欢吕继平张延和
Owner 新余钢铁股份有限公司
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