Whole process dynamic monitoring method for converter steel melting

A dynamic monitoring and converter steelmaking technology, which is applied in the field of metallurgical steelmaking, can solve the problems that the sub-lance method is not suitable for small and medium converters, and is not a full-range dynamic control, etc., and achieve the effect of improving the level of smelting control, simple installation method, and simple and compact equipment

Active Publication Date: 2009-07-08
北京北科麦思科自动化工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two types of steelmaking modes are not fully dynamic control in the smelting process, and the sub-lance method is not suitable for small and medium-sized converters

Method used

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  • Whole process dynamic monitoring method for converter steel melting
  • Whole process dynamic monitoring method for converter steel melting
  • Whole process dynamic monitoring method for converter steel melting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 120t converter steelmaking production, furnace number 80708562, steelmaking raw materials: 100t molten iron, 5t scrap steel, 10t iron nuggets. Smelting steel Q345B. During the smelting process, the furnace gas composition is analyzed throughout the whole process, and the blowing is automatically bombed and corrected at the 903rd second. At the end of the blowing, the system predicts that the carbon content of the molten steel at the end of the system is 0.029%, and the temperature is 1606°C; double samples are taken from the furnace to measure the double temperature comparison The test results are: the carbon content of sample 1 is 0.04%, the carbon content of sample 2 is 0.04%, and the average value is 0.040%; the temperature one is 1611°C, the temperature two is 1598°C, and the average value is 1604.5°C. Therefore, the carbon content error is 0.011%, and the temperature error is 1.5°C.

Embodiment 2

[0054] 120t converter steelmaking production, furnace number 80708564, steelmaking raw materials: 102t molten iron, 5t scrap steel, 8t iron nuggets. Smelting steel Q345B. During the smelting process, the furnace gas composition analysis is carried out throughout the whole process, and the blowing is automatically bombed and corrected at the 923rd second. At the end of the blowing, the system predicts that the carbon content of the molten steel at the end point is 0.038%, and the temperature is 1692°C; double samples are taken from the furnace to measure the double temperature comparison The test results are: the carbon content of sample 1 is 0.039%, the carbon content of sample 2 is 0.039%, and the average value is 0.039%; the temperature one is 1694°C, the temperature two is 1695°C, and the average value is 1694.5°C. Therefore, the carbon content error is 0.001%, and the temperature error is 2.5°C.

Embodiment 3

[0056] 120t converter steelmaking production, furnace number 80708565, steelmaking raw materials: 103t molten iron, 4t scrap steel, 8t iron nuggets. Smelting steel SPHC. During the smelting process, the furnace gas composition analysis is carried out throughout the whole process, and the blowing is automatically bombed and corrected at the 913th second. At the end of the blowing, the system predicts that the carbon content of the molten steel at the end point is 0.04%, and the temperature is 1654°C; double samples are taken from the furnace for double temperature comparison The test results are: the carbon content of sample 1 is 0.031%, the carbon content of sample 2 is 0.037%, and the average value is 0.034%; the temperature one is 1647°C, the temperature two is 1642°C, and the average value is 1644.5°C. Therefore, the carbon content error is 0.006%, and the temperature error is 9.5°C.

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Abstract

The invention pertaining to the field of metallurgy and steel-making technology provides a convertor steelmaking whole-course dynamic monitoring method. The whole-course dynamic control of the convertor steelmaking can be realized by adopting a laser gas analyzer and a stock bin port bombing technology, molten steel component and temperature are forecasted continuously and detected dynamically, and the convertor is assisted to perform the end point judgment. The method comprises steps of using a network of computer to monitor the information of charging, jetting and the like; using the laser gas analyzer as the gas signal acquiring and analyzing device in the convertor smelting process; using the bombing device installed at the stock bin port to performing head ejecting to detect information of molten steel component, temperature and the like; acquired parameters are all transferred through the network of computer; the computer continuously forecasts the parameters of molten steel component, temperature and the like by utilizing the above parameters and a built-in control model, and displays the parameters and provides guidance on the user interface.The invention has advantages that the whole-course feedback signals can be obtained, a whole-course dynamic control of the convertor smelting can be realized, variation of temperature and molten steel component can be forecasted continuously, the size of the convertor capability is not limited, and the convertor has characteristics of simple structure, convenient maintenance, small investment and low rate of fault.

Description

technical field [0001] The invention belongs to the technical field of metallurgical steelmaking, and particularly relates to a method for dynamic monitoring of the whole process of converter steelmaking. Specifically, the whole process of dynamic control of converter steelmaking is carried out by using a laser gas analyzer and bombing at the silo port, and the composition of molten steel (mainly including Continuous forecast and dynamic detection of molten steel carbon, silicon, manganese, phosphorus and sulfur) and temperature, assisting the converter to judge the end point. Background technique [0002] The purpose of converter steelmaking is to continuously reduce the carbon content and raise the temperature of raw materials such as molten iron and scrap steel mixed into the converter by means of continuous oxygen blowing through the oxygen lance. The main basis for judging whether to directly tap steel is whether the carbon content and temperature of molten steel meet t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/30G05B19/048
Inventor 张丽张红文
Owner 北京北科麦思科自动化工程技术有限公司
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