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An automatic control method for converter slag-less smelting

A technology of slag-less smelting and converter, which is applied in the manufacture of converters, etc., and can solve the problems of automatic control technology that have not been reported.

Active Publication Date: 2016-06-29
BEIJING SHOUGANG AUTOMATION INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, only a small number of metallurgical enterprises adopt this kind of converter slag-less smelting process, and there are no relevant reports on the automatic control technology of this process

Method used

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  • An automatic control method for converter slag-less smelting

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Embodiment Construction

[0039] (1) Smelting furnace number: 0800938

[0040] Molten iron: 217.2 tons, main element weight percentage C4.43%, Si0.36%, Mn0.12%, P0.069%, temperature 1346℃

[0041] Steel scrap: 27.72 tons;

[0042] Proceed as follows:

[0043] Step1: Set the requirements for the end point of dephosphorization smelting in the secondary software, with the target temperature at 1350°C, the target carbon at 3.5% by weight, and the target alkalinity at 1.8;

[0044] Step2: The secondary software calculates the amount of dephosphorization smelting flux usage, ore amount and oxygen consumption according to the alkalinity requirements; as follows:

[0045] Lime: 2544kg; dolomite 823kg; ore 1084kg; oxygen consumption 2902m 3 ;

[0046] Step3: The operator confirms the data and sends it to the first-level basic automation system;

[0047] Step4: The operator confirms the start of dephosphorization, smelting and blowing in the first-level basic automation system.

[0048] Step5: The first-le...

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Abstract

An automatic control method for converter slag-less smelting belongs to the technical field of converter steelmaking automatic control. The second-level software is used to model the oxygen lance control and feeding control of the dephosphorization smelting process and decarbonization smelting process of the less-slag smelting process. Through the data communication between the secondary software and the primary automatic control system, the automatic control of the slag-less smelting process is realized. It is characterized in that it is applicable to the slag-less smelting process with molten iron Si>0.2% by weight, and adopts second-level software to separately calculate the amount of auxiliary raw materials, ore amount, and oxygen consumption in the dephosphorization and decarburization smelting processes. The second-level system sends dephosphorization and decarbonization control data to the first-level basic automation system, and the first-level basic automation system completes the blowing process control. The advantage is that it realizes the automatic control of the dephosphorization smelting process and decarbonization smelting process of the converter less-slag smelting process, stabilizes the less-slag smelting production, improves the fluctuation caused by human experience control, improves the automation level of the converter and reduces the workload of the operator.

Description

technical field [0001] The invention belongs to the technical field of automatic control of converter steelmaking, and in particular provides an automatic control method for converter less-slag smelting, which is suitable for the process of converter less-slag smelting. Background technique [0002] Converter steelmaking is an important link in the production process of metallurgical enterprises. Its main purpose is to decarburize and raise the temperature. In addition to using iron materials such as molten iron scrap, the smelting process also needs to use flux materials such as lime and dolomite to form slag during the blowing process. The traditional converter smelting process consumes a lot of secondary raw materials. In order to further reduce the consumption of flux raw materials in converter smelting and achieve the purpose of reducing product costs, the use of less slag smelting technology can be an effective means. The basic idea of ​​smelting with less slag is to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/30C21C5/36
Inventor 邱成国杨伟强蒋学军高雷王琪童刘丹妹廖慧
Owner BEIJING SHOUGANG AUTOMATION INFORMATION TECH