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Dynamic furnace temperature control method for hot rolling heating furnace

A control method and heating furnace technology, applied in the field of steel rolling, can solve the problems of affecting product quality, failing to meet process requirements, and high temperature of silicon steel

Active Publication Date: 2019-01-22
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the target temperature of some silicon steel processes is low. If the target temperature of the slab in front of the silicon steel is higher in the heating furnace, the weight of the front slab is the largest during the heating process. High, not up to the process requirements, seriously affecting product quality

Method used

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  • Dynamic furnace temperature control method for hot rolling heating furnace
  • Dynamic furnace temperature control method for hot rolling heating furnace
  • Dynamic furnace temperature control method for hot rolling heating furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] See Table 1 for the original plan data of the heating billet in this embodiment:

[0140] Table 1: Cold scale values ​​of the original plan data implementation example table

[0141]

Steel type

Slab thickness

Slab width

Slab length

Heating target temperature

1

50A-MZ13

230mm

1280mm

10610mm

1140℃

2

50A-MZ13

230mm

1280mm

10600mm

1140℃

[0142] This example uses different control methods to heat 2 slabs, the steel grade is the same 50A-MZ13, and the specifications are almost the same. Among them, No. 1 slab adopts the original system furnace temperature control method. No. 2 slab adopts the furnace temperature control method of this method, and adds the 50A-MZ13 steel grade to the special steel control database table. The weighting coefficient rule belongs to the furnace temperature setting rule of the specific steel grade. Since the 50A-MZ13 steel grade is silicon steel, it is more sensitive to process temperature and requires high precision for target tempe...

Embodiment 2

[0146] See Table 2 for the original plan data of the heating billet in this embodiment:

[0147] Table 2: Cold scale values ​​of the original plan data implementation example table

[0148]

Steel type

Slab thickness

Slab width

Slab length

Heating target temperature

1

SPCC

230mm

1080mm

9690mm

1220℃

2

SPCC

230mm

1080mm

9460mm

1220℃

[0149] This example uses different control methods to heat 2 slabs, the steel grade is the same SPCC, and the specifications are almost the same. Among them, No. 1 slab adopts the original system furnace temperature control method. No. 2 slab adopts the furnace temperature control method of this method. Since the SPCC steel grade is not in the specific steel grade database table, the new method program judges the average necessary furnace temperature setting rule. Because SPCC steel grade is also more sensitive to process temperature, the weighted calculation has a higher priority. In this example, two steels are heated to a target te...

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Abstract

The invention relates to a dynamic furnace temperature control method for a hot rolling heating furnace. The method comprises the steps that real-time temperatures of steel billets in the furnace areperiodically calculated; the remaining in-furnace time of the steel billets in the furnace is predicted; the temperature of a certain region for a plate blank to come out of the furnace is predicted;the necessary furnace temperatures required by all sections in the heating furnace are determined; aiming at different steel types, the furnace temperature is dynamically adjusted, and the final furnace temperature set value is determined; the furnace temperature set value is calculated according to the working condition of one plate blank and the heating furnace, and each steel billet needs to becalculated once; for one furnace section, the number of the steel billets in the section is large, while the furnace set value is only one, therefore, all steel types existing in each furnace sectionneed to be retrieved, and if specific steel types exist, specific control over furnace temperature needs to be conducted. The method has the advantages that aiming at different steel types, furnace temperature setting is conducted through comprehensive treatment, and the produced specific steel types can be specially controlled.

Description

Technical field [0001] The invention belongs to the field of steel rolling, and in particular relates to a dynamic furnace temperature control method for a hot rolling heating furnace. Background technique [0002] In modern industrial production, the heating furnace is a very important link in the production of hot strip mills, which affects the slab heating quality, equipment stability, and production rhythm. Also reduce fuel consumption and improve energy efficiency. The automatic combustion model of the heating furnace realizes automatic steel burning according to this requirement. [0003] The secondary computer control system of the heating furnace is a program control system. Its control object is the heating furnace, and the control parameters include variables such as furnace temperature, slab temperature, and heating time. Interference factors for control include changes in rolling rhythm, heating value of fuel, fuel pressure and flow, and equipment status. Process co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74
CPCB21B37/74
Inventor 赵明车志良赵勐谭学超
Owner ANGANG STEEL CO LTD