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Automatic control method of duplex decarburization converter

A technology of decarburization converter and duplex process, which can be used in the manufacture of converters and other directions, and can solve the problems that have not been seen.

Inactive Publication Date: 2013-04-24
BEIJING SHOUGANG AUTOMATION INFORMATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The decarburization converter under the dual process uses dephosphorized semi-steel as the iron raw material. The carbon content of the semi-steel is about 3.5% by weight and the temperature is about 1350°C. It is quite different from the general converter smelting process. The automatic control technology for this smelting process , no related reports

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  • Automatic control method of duplex decarburization converter

Examples

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Effect test

example 1

[0066] Decarburization smelting furnace number: 11103296

[0067] 307 tons of semi-steel are loaded, the composition of the semi-steel from the double dephosphorization converter, C 3.3% by weight Si 0.03% by weight Mn0.01% by weight P 0.031% by weight, the temperature of the semi-steel is 1350°C.

[0068] Follow the relevant steps below:

[0069] Step 1: two-level system, according to the condition of semi-steel loading, and the target temperature of steel is 1690, the target carbon is 0.05% by weight, and the target alkalinity is 3.2. Calculate the total amount of flux, coolant and oxygen in this furnace as follows:

[0070] Lime: 4000kg; fluorite 600kg; light burning 2000kg, ore 2000kg; oxygen consumption 10900m 3 ;

[0071] Step 2: The second level automatically selects the corresponding oxygen lance mode 2 according to the temperature and composition of the semi-steel, automatically selects the corresponding mode 1 for feeding, matches the flux, coolant, and oxygen amo...

example 2

[0078] Decarburization smelting furnace number: 11203402

[0079] 310 tons of semi-steel are loaded, the composition of the semi-steel from the double dephosphorization converter is C 3.25% by weight Si 0.02% by weight Mn 0.015% by weight P 0.024% by weight, and the temperature of the semi-steel is 1345°C.

[0080] Follow the relevant steps below:

[0081] Step 1: two-level system, according to the loading of semi-steel, and the target temperature of steel is 1685, the target carbon is 0.055% by weight, and the target alkalinity is 3.2. Calculate the total amount of flux, coolant and oxygen in this furnace as follows:

[0082] Lime: 3500kg; fluorite 500kg; light burning 2000kg, ore 1200kg; oxygen consumption 11573m 3 ;

[0083] Step 2: The second level automatically selects the corresponding oxygen lance mode 2 according to the temperature and composition of the semi-steel, automatically selects the corresponding mode 2 for feeding, matches the flux, coolant, and oxygen amo...

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Abstract

The invention discloses an automatic control method of a duplex decarburization converter, belonging to the technical field of automatic control of converter steel making. According to the invention, based on a present related two-level system, a dynamic event-triggered mode is designed which comprises an oxygen demand absolute value event, a relative main blowing ending oxygen demand event, a relative blowing ending event, a relative deslagging accomplishing event, and a percentage event, and the original fixed mode relative to oxygen demand percentage is replaced; simultaneously, a mode that an oxygen lance and charging mode automatically carries out pattern matching according to Si content of the filled molten iron, Mn content of the molten iron, and the temperature of the molten iron;according to the actual situation of the semisteel, the two-level system automatically selects corresponding mode data, and distributes corresponding control data to the primary PLC system to finish the automatic control of the whole blowing process. The invention has the advantages of improving the automatic control level of the duplex decarburization converter, and simultaneously improving the double hit rate of the converter blowing terminal point.

Description

technical field [0001] The invention belongs to the technical field of automatic control of converter steelmaking, and in particular relates to an automatic control method of a decarburization converter in a double process mode. Background technique [0002] In the dual steelmaking process, one converter performs the dephosphorization operation of molten iron, and the other converter receives semi-steel from the dephosphorization furnace for decarburization operation, and the dephosphorization and decarburization of molten iron are separated and completed by two converters. [0003] The dephosphorization and decarburization dual process has the following main characteristics: First, it is beneficial to dephosphorization and decarbonization. Dephosphorization of molten iron is carried out in the top-bottom combined blowing converter, so that the molten pool is well stirred, which can speed up the flow of slag and increase the contact area between slag and molten iron, promote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/34
Inventor 胡丕俊魏钢李金柱蒋学军张丙龙杨伟强胡显堂边吉明邱成国李海森袁天祥
Owner BEIJING SHOUGANG AUTOMATION INFORMATION TECH